1859 строки
82 KiB
Python
Executable File
1859 строки
82 KiB
Python
Executable File
#!/usr/bin/env python2
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# -*- Mode: python -*-
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'''
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emcc - compiler helper script
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=============================
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emcc is a drop-in replacement for a compiler like gcc or clang.
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Tell your build system to use this instead of the compiler, and similarly
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use emar, emranlib etc. instead of the same command without 'em'.
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Example uses:
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* For configure, instead of ./configure, cmake, etc., run emconfigure.py
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with that command as an argument, for example
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emconfigure.py ./configure [options]
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emconfigure.py is a tiny script that just sets some environment vars
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as a convenience. The command just shown is equivalent to
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EMMAKEN_JUST_CONFIGURE=1 RANLIB=PATH/emranlib AR=PATH/emar CXX=PATH/em++ CC=PATH/emcc ./configure [options]
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where PATH is the path to this file.
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EMMAKEN_JUST_CONFIGURE tells emcc that it is being run in ./configure,
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so it should relay everything to gcc/g++. You should not define that when
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running make, of course.
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After setting that up, run your build system normally.
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Note the appearance of em++ instead of emcc
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for the C++ compiler. This is needed for cases where we get
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a C++ file with a C extension, in which case CMake can be told
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to run g++ on it despite the .c extension, see
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https://github.com/kripken/emscripten/issues/6
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(If a similar situation occurs with ./configure, you can do the same there too.)
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emcc can be influenced by a few environment variables:
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EMMAKEN_NO_SDK - Will tell emcc *not* to use the emscripten headers. Instead
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your system headers will be used.
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EMMAKEN_COMPILER - The compiler to be used, if you don't want the default clang.
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'''
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import os, sys, shutil, tempfile, subprocess, shlex, time, re, logging
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from subprocess import PIPE
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from tools import shared, jsrun, system_libs
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from tools.shared import Compression, execute, suffix, unsuffixed, unsuffixed_basename, WINDOWS
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from tools.response_file import read_response_file
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# endings = dot + a suffix, safe to test by filename.endswith(endings)
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C_ENDINGS = ('.c', '.C')
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CXX_ENDINGS = ('.cpp', '.cxx', '.cc', '.CPP', '.CXX', '.CC')
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OBJC_ENDINGS = ('.m',)
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OBJCXX_ENDINGS = ('.mm',)
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SOURCE_ENDINGS = C_ENDINGS + CXX_ENDINGS + OBJC_ENDINGS + OBJCXX_ENDINGS
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BITCODE_ENDINGS = ('.bc', '.o', '.obj')
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DYNAMICLIB_ENDINGS = ('.dylib', '.so', '.dll')
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STATICLIB_ENDINGS = ('.a',)
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ASSEMBLY_ENDINGS = ('.ll',)
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HEADER_ENDINGS = ('.h', '.hxx', '.hpp', '.hh', '.H', '.HXX', '.HPP', '.HH')
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LIB_PREFIXES = ('', 'lib')
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JS_CONTAINING_SUFFIXES = ('js', 'html')
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# Mapping of emcc opt levels to llvm opt levels. We use llvm opt level 3 in emcc opt
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# levels 2 and 3 (emcc 3 is unsafe opts, so unsuitable for the only level to get
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# llvm opt level 3, and speed-wise emcc level 2 is already the slowest/most optimizing
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# level)
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LLVM_OPT_LEVEL = {
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0: 0,
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1: 1,
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2: 3,
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3: 3,
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}
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DEBUG = os.environ.get('EMCC_DEBUG')
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if DEBUG == "0":
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DEBUG = None
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TEMP_DIR = os.environ.get('EMCC_TEMP_DIR')
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LEAVE_INPUTS_RAW = os.environ.get('EMCC_LEAVE_INPUTS_RAW') # Do not compile .ll files into .bc, just compile them with emscripten directly
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# Not recommended, this is mainly for the test runner, or if you have some other
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# specific need.
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# One major limitation with this mode is that libc and libc++ cannot be
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# added in. Also, LLVM optimizations will not be done, nor dead code elimination
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AUTODEBUG = os.environ.get('EMCC_AUTODEBUG') # If set to 1, we will run the autodebugger (the automatic debugging tool, see tools/autodebugger).
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# Note that this will disable inclusion of libraries. This is useful because including
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# dlmalloc makes it hard to compare native and js builds
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EMCC_CFLAGS = os.environ.get('EMCC_CFLAGS') # Additional compiler flags that we treat as if they were passed to us on the commandline
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logging.debug('invocation: ' + ' '.join(sys.argv) + (' + ' + EMCC_CFLAGS if EMCC_CFLAGS else ''))
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if EMCC_CFLAGS: sys.argv.append(EMCC_CFLAGS)
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if DEBUG and LEAVE_INPUTS_RAW: logging.warning('leaving inputs raw')
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stdout = PIPE if not DEBUG else None # suppress output of child processes
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stderr = PIPE if not DEBUG else None # unless we are in DEBUG mode
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shared.check_sanity(force=DEBUG)
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# Handle some global flags
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if len(sys.argv) == 1:
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logging.warning('no input files')
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exit(1)
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# read response files very early on
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response_file = True
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while response_file:
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response_file = None
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for index in range(1, len(sys.argv)):
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if sys.argv[index][0] == '@':
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# found one, loop again next time
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response_file = True
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extra_args = read_response_file(sys.argv[index])
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# slice in extra_args in place of the response file arg
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sys.argv[index:index+1] = extra_args
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break
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if len(sys.argv) == 1 or '--help' in sys.argv:
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this = os.path.basename('em++' if os.environ.get('EMMAKEN_CXX') else 'emcc')
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print '''%s [options] file...
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Most normal gcc/g++ options will work, for example:
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--help Display this information
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--version Display compiler version information
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Options that are modified or new in %s include:
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-O0 No optimizations (default). This is the recommended
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setting for starting to port a project, as it
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includes various assertions.
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-O1 Simple optimizations, including asm.js, LLVM -O1
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optimizations, relooping, and no runtime assertions
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or C++ exception catching (to re-enable
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C++ exception catching, use
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-s DISABLE_EXCEPTION_CATCHING=0 ), and enables
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-s ALIASING_FUNCTION_POINTERS=1
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This is the recommended setting when you want a
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reasonably optimized build that is generated as
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quickly as possible (it builds much faster than -O2).
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(Note: for details on the affects of different
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opt levels, see apply_opt_level() in
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tools/shared.py and also src/settings.js.)
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-O2 As -O1, plus various js-level optimizations and
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LLVM -O3 optimizations. This is the recommended
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setting for a release build: slower compilation
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time in return for the smallest and fastest
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output.
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-O3 As -O2, plus additional optimizations that can
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take a significant amount of compilation time and/or
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are relatively new.
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For tips on optimizing your code, see
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https://github.com/kripken/emscripten/wiki/Optimizing-Code
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-s OPTION=VALUE JavaScript code generation option passed
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into the emscripten compiler. For the
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available options, see src/settings.js
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Note that for options that are lists, you
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need quotation marks in most shells, for
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example
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-s RUNTIME_LINKED_LIBS="['liblib.so']"
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or
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-s "RUNTIME_LINKED_LIBS=['liblib.so']"
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(without the external "s in either of those,
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you would get an error)
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You can also specify a file from which the
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value would be read, for example,
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-s DEAD_FUNCTIONS=@/path/to/file
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The contents of /path/to/file will be read,
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JSON.parsed and set into DEAD_FUNCTIONS (so
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the file could contain
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["_func1", "func2"]
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). Note that the path must be absolute, not
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relative.
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-g Use debug info. When compiling to bitcode,
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this is the same as in clang and gcc, it
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adds debug info to the object files. When
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compiling from source to JS or bitcode to JS,
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it is equivalent to -g3 (keep code as debuggable
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as possible, except for discarding LLVM
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debug info, so no C/C++ line numbers; use
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-g4 to get line number debugging info in JS).
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-g<level> When compiling from bitcode to JS, we can
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keep the code debuggable to different
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degrees. Each of these levels builds on the
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previous:
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-g0 Make no effort to keep code debuggable.
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Will discard LLVM debug info. (default
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in -O1+)
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-g1 Preserve (do not minify) whitespace
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-g2 Preserve function names
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-g3 Preserve variable names
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-g4 Preserve LLVM debug info (if -g was
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used when compiling the C/C++ sources),
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show line number debug comments, and
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generate source maps. This is the highest
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level of debuggability. Note that this
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may make -O1 and above significantly
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slower because JS optimization will be
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limited to 1 core. (default in -O0)
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--typed-arrays <mode> 0: No typed arrays
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1: Parallel typed arrays
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2: Shared (C-like) typed arrays (default)
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--js-opts 0: Prevent JS optimizer from running
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1: Use JS optimizer (default)
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--llvm-opts <level> 0: No LLVM optimizations (default in -O0)
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1: -O1 LLVM optimizations (default in -O1)
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2: -O2 LLVM optimizations
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3: -O3 LLVM optimizations (default in -O2+)
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You can also specify arbitrary LLVM options, e.g.
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--llvm-opts "['-O3', '-somethingelse']"
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--llvm-lto <level> 0: No LLVM LTO (default)
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1: LLVM LTO is performed
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2: We combine all the bitcode and run LLVM opt -O3
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on that (which optimizes across modules, but is
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not the same as normal LTO), but do not do normal
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LTO
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3: We do both 2 and then 1
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Note: If LLVM optimizations are not run
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(see --llvm-opts), setting this has no
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effect.
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Note that LLVM LTO is not perfectly stable yet,
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and can can cause code to behave incorrectly.
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--closure <on> 0: No closure compiler (default in -O2 and below)
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1: Run closure compiler. This greatly reduces
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code size and may in some cases increase
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runtime speed (although the opposite can also
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occur). Note that it takes time to run, and
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may require some changes to the code.
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In asm.js mode, closure will only be used on the
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'shell' code around the compiled code (the
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compiled code will be processed by the custom
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asm.js minifier).
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Note: If closure compiler hits an out-of-memory,
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try adjusting JAVA_HEAP_SIZE in the environment
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(for example, to 4096m for 4GB).
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Note: Closure is only run if js opts are being
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done (-O2 or above, or --js-opts 1).
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--pre-js <file> A file whose contents are added before the
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generated code. This is done *before*
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optimization, so it will be minified
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properly if closure compiler is run.
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--post-js <file> A file whose contents are added after the
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generated code This is done *before*
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optimization, so it will be minified
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properly if closure compiler is run.
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--embed-file <file> A file to embed inside the generated
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JavaScript. The compiled code will be able
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to access the file in the current directory
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with the same name as given here. So if
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you do --embed-file dir/file.dat, then
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(1) dir/file.dat must exist relative to
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where you run emcc, and (2) your compiled
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code will be able to find the file by
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reading that same path, dir/file.dat.
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If a directory is passed here, its entire
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contents will be embedded.
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Note: Embedding files is much less
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efficient than preloading them. You
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should only use it for small amounts
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of small files. Instead, use
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--preload-file which emits efficient
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binary data.
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--preload-file <name> A file to preload before running the
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compiled code asynchronously. Otherwise
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similar to --embed-file, except that this
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option is only relevant when generating
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HTML (it uses asynchronous binary XHRs),
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or JS that will be used in a web page.
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If a directory is passed here, its entire
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contents will be preloaded.
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Preloaded files are stored in filename.data,
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where filename.html is the main file you
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are compiling to. To run your code, you
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will need both the .html and the .data.
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emcc runs tools/file_packager.py to do the
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actual packaging of embedded and preloaded
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files. You can run the file packager yourself
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if you want, see docs inside that file. You
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should then put the output of the file packager
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in an emcc --pre-js, so that it executes before
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your main compiled code (or run it before in
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some other way).
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For more docs on the options --preload-file
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accepts, see https://github.com/kripken/emscripten/wiki/Filesystem-Guide
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--exclude-file <name> Files and directories to be excluded from
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--embed-file and --preload-file
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wildcard is supported
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--shell-file <path> The path name to a skeleton HTML file used
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when generating HTML output. The shell file
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used needs to have this token inside it:
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{{{ SCRIPT }}}
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(see src/shell.html and
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src/shell_minimal.html for examples)
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Note that this argument is ignored if a
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target other than HTML is specified using
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the -o option.
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--compression <codec> **THIS OPTION IS DEPRECATED**
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Compress both the compiled code and embedded/
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preloaded files. <codec> should be a triple,
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<native_encoder>,<js_decoder>,<js_name>
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where native_encoder is a native executable
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that compresses stdin to stdout (the simplest
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possible interface), js_decoder is a
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JavaScript file that implements a decoder,
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and js_name is the name of the function to
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call in the decoder file (which should
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receive an array/typed array and return
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an array/typed array.
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Compression only works when generating HTML.
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When compression is on, all filed specified
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to be preloaded are compressed in one big
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archive, which is given the same name as the
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output HTML but with suffix .data.compress
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--minify 0 Identical to -g1
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--js-transform <cmd> <cmd> will be called on the generated code
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before it is optimized. This lets you modify
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the JavaScript, for example adding some code
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or removing some code, in a way that those
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modifications will be optimized together with
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the generated code properly. <cmd> will be
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called with the filename of the generated
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code as a parameter; to modify the code, you
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can read the original data and then append to
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it or overwrite it with the modified data.
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<cmd> is interpreted as a space-separated
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list of arguments, for example, <cmd> of
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"python processor.py" will cause a python
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script to be run.
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--split <size> Splits the resulting javascript file into pieces
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to ease debugging. This option only works if
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Javascript is generated (target -o <name>.js).
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Files with function declarations must be loaded
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before main file upon execution.
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Without "-g" option:
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Creates files with function declarations up
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to the given size with the suffix
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"_functions.partxxx.js" and a main file with
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the suffix ".js".
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With "-g" option:
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Recreates the directory structure of the C
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source files and stores function declarations
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in their respective C files with the suffix
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".js". If such a file exceeds the given size,
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files with the suffix ".partxxx.js" are created.
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The main file resides in the base directory and
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has the suffix ".js".
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Note: this option is deprecated (modern JS debuggers
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should work ok even on large files)
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--bind Compiles the source code using the "embind"
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bindings approach, which connects C/C++ and JS.
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--ignore-dynamic-linking Normally emcc will treat dynamic linking like
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static linking, by linking in the code from
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the dynamic library. This fails if the same
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dynamic library is linked more than once.
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With this option, dynamic linking is ignored,
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which allows the build system to proceed without
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errors. However, you will need to manually
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link to the shared libraries later on yourself.
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--js-library <lib> A JavaScript library to use in addition to
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those in Emscripten's src/library_*
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-v Turns on verbose output. This will pass
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-v to Clang, and also enable EMCC_DEBUG
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to details emcc's operations
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--clear-cache Manually clears the cache of compiled
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emscripten system libraries (libc++,
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libc++abi, libc). This is normally
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handled automatically, but if you update
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llvm in-place (instead of having a different
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directory for a new version), the caching
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mechanism can get confused. Clearing the
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cache can fix weird problems related to
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cache incompatibilities, like clang failing
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to link with library files. This also clears
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other cached data like the jcache and
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the bootstrapped relooper. After the cache
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is cleared, this process will exit.
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--save-bc PATH When compiling to JavaScript or HTML, this
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option will save a copy of the bitcode to
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the specified path. The bitcode will include
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all files being linked, including standard
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libraries, and after any link-time optimizations
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(if any).
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--memory-init-file <on> 0: Do not emit a separate memory initialization
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file, keep the static initialization inside
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the generated JavaScript as text (default)
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1: Emit a separate memory initialization file
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in binary format. This is more efficient than
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storing it as text inside JavaScript, but does
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mean you have another file to publish.
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-Wno-warn-absolute-paths If not specified, the compiler will warn about any
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uses of absolute paths in -I and -L command line
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directives. Pass this flag on the command line
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to hide these warnings and acknowledge that the
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explicit use of absolute paths is intentional.
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--proxy-to-worker Generates both html and js files. The main
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program is in js, and the html proxies to/from it.
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--emrun Enables the generated output to be aware of the
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emrun command line tool. This allows stdout, stderr
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and exit(returncode) capture when running the
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generated application through emrun.
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--em-config Specifies the location of the .emscripten configuration
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file for the current compiler run. If not specified,
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the environment variable EM_CONFIG is read for this
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file, and if that is not set, the default location
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~/.emscripten is assumed.
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--default-obj-ext .ext Specifies the file suffix to generate if the location
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of a directory name is passed to -o directive, e.g.
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emcc -c a.c -o dir/
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will by default generate an output name 'dir/a.o',
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but this cmdline param can be passed to generate a
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file with a custom suffix 'dir/a.ext'.
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The target file, if specified (-o <target>), defines what will
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be generated:
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<name>.js JavaScript
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<name>.html HTML + side JavaScript file (<name>.js)
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(JS on the side improves page load time)
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<name>.bc LLVM bitcode (default)
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<name>.o LLVM bitcode (same as .bc)
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(Note that if --memory-init-file is used, then in addition to a
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.js or .html file that is generated, a .mem file will also appear.)
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The -c option (which tells gcc not to run the linker) will
|
|
cause LLVM bitcode to be generated, as %s only generates
|
|
JavaScript in the final linking stage of building.
|
|
|
|
The input file(s) can be either source code files that
|
|
Clang can handle (C or C++), LLVM bitcode in binary form,
|
|
or LLVM assembly files in human-readable form.
|
|
|
|
emcc is affected by several environment variables. For details, view
|
|
the source of emcc (search for 'os.environ').
|
|
|
|
emcc: supported targets: llvm bitcode, javascript, NOT elf
|
|
(autoconf likes to see elf above to enable shared object support)
|
|
''' % (this, this, this)
|
|
exit(0)
|
|
|
|
elif sys.argv[1] == '--version':
|
|
revision = '(unknown revision)'
|
|
here = os.getcwd()
|
|
os.chdir(shared.path_from_root())
|
|
try:
|
|
revision = execute(['git', 'show'], stdout=PIPE, stderr=PIPE)[0].split('\n')[0]
|
|
except:
|
|
pass
|
|
finally:
|
|
os.chdir(here)
|
|
print '''emcc (Emscripten GCC-like replacement) %s (%s)
|
|
Copyright (C) 2014 the Emscripten authors (see AUTHORS.txt)
|
|
This is free and open source software under the MIT license.
|
|
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
''' % (shared.EMSCRIPTEN_VERSION, revision)
|
|
exit(0)
|
|
|
|
elif len(sys.argv) == 2 and sys.argv[1] == '-v': # -v with no inputs
|
|
print 'emcc (Emscripten GCC-like replacement + linker emulating GNU ld ) %s' % shared.EMSCRIPTEN_VERSION
|
|
shared.check_sanity(force=True)
|
|
exit(subprocess.call([shared.CLANG, '-v']))
|
|
|
|
def is_minus_s_for_emcc(newargs, i):
|
|
assert newargs[i] == '-s'
|
|
if i+1 < len(newargs) and '=' in newargs[i+1]: # -s OPT=VALUE is for us, -s by itself is a linker option
|
|
return True
|
|
else:
|
|
logging.warning('treating -s as linker option and not as -s OPT=VALUE for js compilation')
|
|
return False
|
|
|
|
# If this is a configure-type thing, do not compile to JavaScript, instead use clang
|
|
# to compile to a native binary (using our headers, so things make sense later)
|
|
CONFIGURE_CONFIG = (os.environ.get('EMMAKEN_JUST_CONFIGURE') or 'conftest.c' in sys.argv) and not os.environ.get('EMMAKEN_JUST_CONFIGURE_RECURSE')
|
|
CMAKE_CONFIG = 'CMakeFiles/cmTryCompileExec.dir' in ' '.join(sys.argv)# or 'CMakeCCompilerId' in ' '.join(sys.argv)
|
|
if CONFIGURE_CONFIG or CMAKE_CONFIG:
|
|
debug_configure = 0 # XXX use this to debug configure stuff. ./configure's generally hide our normal output including stderr so we write to a file
|
|
use_js = os.environ.get('EMCONFIGURE_JS') # whether we fake configure tests using clang - the local, native compiler - or not. if not we generate JS and use node with a shebang
|
|
# neither approach is perfect, you can try both, but may need to edit configure scripts in some cases
|
|
# XXX False is not fully tested yet
|
|
|
|
if debug_configure:
|
|
tempout = '/tmp/emscripten_temp/out'
|
|
if not os.path.exists(tempout):
|
|
open(tempout, 'w').write('//\n')
|
|
|
|
src = None
|
|
for arg in sys.argv:
|
|
if arg.endswith('.c'):
|
|
try:
|
|
src = open(arg).read()
|
|
if debug_configure: open(tempout, 'a').write('============= ' + arg + '\n' + src + '\n=============\n\n')
|
|
except:
|
|
pass
|
|
elif arg.endswith('.s'):
|
|
if debug_configure: open(tempout, 'a').write('(compiling .s assembly, must use clang\n')
|
|
use_js = 0
|
|
elif arg == '-E':
|
|
use_js = 0
|
|
|
|
if src:
|
|
if 'fopen' in src and '"w"' in src:
|
|
use_js = 0 # we cannot write to files from js!
|
|
if debug_configure: open(tempout, 'a').write('Forcing clang since uses fopen to write\n')
|
|
|
|
compiler = os.environ.get('CONFIGURE_CC') or (shared.CLANG if not use_js else shared.EMCC) # if CONFIGURE_CC is defined, use that. let's you use local gcc etc. if you need that
|
|
if not ('CXXCompiler' in ' '.join(sys.argv) or os.environ.get('EMMAKEN_CXX')):
|
|
compiler = shared.to_cc(compiler)
|
|
|
|
def filter_emscripten_options(argv):
|
|
idx = 0
|
|
skip_next = False
|
|
for el in argv:
|
|
if skip_next:
|
|
skip_next = False
|
|
idx += 1
|
|
continue
|
|
if not use_js and el == '-s' and is_minus_s_for_emcc(argv, idx): # skip -s X=Y if not using js for configure
|
|
skip_next = True
|
|
else:
|
|
yield el
|
|
idx += 1
|
|
|
|
cmd = [compiler] + list(filter_emscripten_options(sys.argv[1:]))
|
|
if not use_js: cmd += shared.EMSDK_OPTS + ['-D__EMSCRIPTEN__', '-DEMSCRIPTEN']
|
|
if use_js: cmd += ['-s', 'ERROR_ON_UNDEFINED_SYMBOLS=1'] # configure tests should fail when an undefined symbol exists
|
|
|
|
logging.debug('just configuring: ' + ' '.join(cmd))
|
|
if debug_configure: open(tempout, 'a').write('emcc, just configuring: ' + ' '.join(cmd) + '\n\n')
|
|
|
|
if not use_js:
|
|
exit(subprocess.call(cmd))
|
|
else:
|
|
only_object = '-c' in cmd
|
|
target = None
|
|
for i in range(len(cmd)-1):
|
|
if cmd[i] == '-o':
|
|
if not only_object:
|
|
cmd[i+1] += '.js'
|
|
target = cmd[i+1]
|
|
break
|
|
print 't1', target
|
|
if not target:
|
|
target = 'a.out.js'
|
|
print 't2', target, only_object
|
|
os.environ['EMMAKEN_JUST_CONFIGURE_RECURSE'] = '1'
|
|
ret = subprocess.call(cmd)
|
|
os.environ['EMMAKEN_JUST_CONFIGURE_RECURSE'] = ''
|
|
if not os.path.exists(target): exit(1)
|
|
if target.endswith('.js'):
|
|
shutil.copyfile(target, target[:-3])
|
|
target = target[:-3]
|
|
src = open(target).read()
|
|
full_node = ' '.join(shared.listify(shared.NODE_JS))
|
|
if os.path.sep not in full_node:
|
|
full_node = '/usr/bin/' + full_node # TODO: use whereis etc. And how about non-*NIX?
|
|
open(target, 'w').write('#!' + full_node + '\n' + src) # add shebang
|
|
import stat
|
|
os.chmod(target, stat.S_IMODE(os.stat(target).st_mode) | stat.S_IXUSR) # make executable
|
|
exit(ret)
|
|
|
|
if os.environ.get('EMMAKEN_COMPILER'):
|
|
CXX = os.environ['EMMAKEN_COMPILER']
|
|
else:
|
|
CXX = shared.CLANG
|
|
|
|
CC = shared.to_cc(CXX)
|
|
|
|
# If we got here from a redirection through emmakenxx.py, then force a C++ compiler here
|
|
if os.environ.get('EMMAKEN_CXX'):
|
|
CC = CXX
|
|
|
|
CC_ADDITIONAL_ARGS = shared.COMPILER_OPTS
|
|
|
|
EMMAKEN_CFLAGS = os.environ.get('EMMAKEN_CFLAGS')
|
|
if EMMAKEN_CFLAGS: sys.argv += shlex.split(EMMAKEN_CFLAGS)
|
|
|
|
# ---------------- Utilities ---------------
|
|
|
|
seen_names = {}
|
|
def uniquename(name):
|
|
if name not in seen_names:
|
|
seen_names[name] = str(len(seen_names))
|
|
return unsuffixed(name) + '_' + seen_names[name] + (('.' + suffix(name)) if suffix(name) else '')
|
|
|
|
# ---------------- End configs -------------
|
|
|
|
if len(sys.argv) == 1 or sys.argv[1] in ['x', 't']:
|
|
# noop ar
|
|
logging.debug('just ar')
|
|
sys.exit(0)
|
|
|
|
use_cxx = True
|
|
|
|
for i in range(1, len(sys.argv)):
|
|
arg = sys.argv[i]
|
|
if not arg.startswith('-'):
|
|
if arg.endswith(C_ENDINGS + OBJC_ENDINGS):
|
|
use_cxx = False
|
|
|
|
if '-M' in sys.argv or '-MM' in sys.argv:
|
|
# Just output dependencies, do not compile. Warning: clang and gcc behave differently with -MF! (clang seems to not recognize it)
|
|
cmd = [CC] + shared.COMPILER_OPTS + sys.argv[1:]
|
|
logging.debug('just dependencies: ' + ' '.join(cmd))
|
|
exit(subprocess.call(cmd))
|
|
|
|
if '-E' in sys.argv:
|
|
# Just run the preprocessor
|
|
cmd = [CC] + sys.argv[1:]
|
|
logging.debug('just preprocessor ' + ' '.join(cmd))
|
|
exit(subprocess.call(cmd))
|
|
|
|
# Check if a target is specified
|
|
target = None
|
|
for i in range(len(sys.argv)-1):
|
|
if sys.argv[i].startswith('-o='):
|
|
raise Exception('Invalid syntax: do not use -o=X, use -o X')
|
|
|
|
if sys.argv[i] == '-o':
|
|
target = sys.argv[i+1]
|
|
sys.argv = sys.argv[:i] + sys.argv[i+2:]
|
|
break
|
|
|
|
specified_target = target
|
|
target = specified_target if specified_target is not None else 'a.out.js' # specified_target is the user-specified one, target is what we will generate
|
|
target_basename = unsuffixed_basename(target)
|
|
|
|
if '.' in target:
|
|
final_suffix = target.split('.')[-1]
|
|
else:
|
|
final_suffix = ''
|
|
|
|
if TEMP_DIR:
|
|
temp_dir = TEMP_DIR
|
|
if os.path.exists(temp_dir):
|
|
shutil.rmtree(temp_dir) # clear it
|
|
os.makedirs(temp_dir)
|
|
else:
|
|
temp_root = shared.TEMP_DIR
|
|
if not os.path.exists(temp_root):
|
|
os.makedirs(temp_root)
|
|
temp_dir = tempfile.mkdtemp(dir=temp_root)
|
|
|
|
def in_temp(name):
|
|
return os.path.join(temp_dir, os.path.basename(name))
|
|
|
|
# Parses the essential suffix of a filename, discarding Unix-style version numbers in the name. For example for 'libz.so.1.2.8' returns '.so'
|
|
def filename_type_suffix(filename):
|
|
for i in reversed(filename.split('.')[1:]):
|
|
if not i.isdigit():
|
|
return i
|
|
return ''
|
|
|
|
def filename_type_ending(filename):
|
|
suffix = filename_type_suffix(filename)
|
|
return '' if not suffix else ('.' + suffix)
|
|
|
|
# Log out times for emcc stages
|
|
log_time_last = time.time()
|
|
def log_time(name):
|
|
global log_time_last
|
|
now = time.time()
|
|
logging.debug('emcc step "%s" took %.2f seconds', name, now - log_time_last)
|
|
log_time_last = now
|
|
|
|
try:
|
|
call = CXX if use_cxx else CC
|
|
|
|
## Parse args
|
|
|
|
newargs = sys.argv[1:]
|
|
|
|
opt_level = 0
|
|
debug_level = 0
|
|
js_opts = None
|
|
llvm_opts = None
|
|
llvm_lto = None
|
|
closure = None
|
|
js_transform = None
|
|
pre_js = ''
|
|
post_js = ''
|
|
split_js_file = None
|
|
preload_files = []
|
|
embed_files = []
|
|
exclude_files = []
|
|
compression = None
|
|
ignore_dynamic_linking = False
|
|
shell_path = shared.path_from_root('src', 'shell.html')
|
|
js_libraries = []
|
|
bind = False
|
|
emrun = False
|
|
jcache = False
|
|
save_bc = False
|
|
memory_init_file = False
|
|
use_preload_cache = False
|
|
no_heap_copy = False
|
|
proxy_to_worker = False
|
|
default_object_extension = '.o'
|
|
|
|
if use_cxx:
|
|
default_cxx_std = '-std=c++03' # Enforce a consistent C++ standard when compiling .cpp files, if user does not specify one on the cmdline.
|
|
else:
|
|
default_cxx_std = '' # Compiling C code with .c files, don't enforce a default C++ std.
|
|
|
|
def check_bad_eq(arg):
|
|
assert '=' not in arg, 'Invalid parameter (do not use "=" with "--" options)'
|
|
|
|
absolute_warning_shown = False
|
|
|
|
# Scan for warning suppression message in advance from other cmdline flags, so that it works even if -I or -L directives are present before this.
|
|
for i in range(len(newargs)):
|
|
if newargs[i] == '-Wno-warn-absolute-paths':
|
|
newargs[i] = ''
|
|
absolute_warning_shown = True
|
|
|
|
settings_changes = []
|
|
|
|
def validate_arg_level(level_string, max_level, err_msg):
|
|
try:
|
|
level = int(level_string)
|
|
assert 0 <= level <= max_level
|
|
except:
|
|
raise Exception(err_msg)
|
|
return level
|
|
|
|
for i in range(len(newargs)):
|
|
newargs[i] = newargs[i].strip() # On Windows Vista (and possibly others), excessive spaces in the command line leak into the items in this array, so trim e.g. 'foo.cpp ' -> 'foo.cpp'
|
|
if newargs[i].startswith('-O'):
|
|
# Let -O default to -O2, which is what gcc does.
|
|
requested_level = newargs[i][2:] or '2'
|
|
if requested_level == 's':
|
|
requested_level = 2
|
|
settings_changes.append('INLINING_LIMIT=50')
|
|
opt_level = validate_arg_level(requested_level, 3, 'Invalid optimization level: ' + newargs[i])
|
|
# We leave the -O option in place so that the clang front-end runs in that
|
|
# optimization mode, but we disable the actual optimization passes, as we'll
|
|
# run them seperately.
|
|
newargs.append('-mllvm')
|
|
newargs.append('-disable-llvm-optzns')
|
|
elif newargs[i].startswith('--js-opts'):
|
|
check_bad_eq(newargs[i])
|
|
js_opts = eval(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--llvm-opts'):
|
|
check_bad_eq(newargs[i])
|
|
llvm_opts = eval(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--llvm-lto'):
|
|
check_bad_eq(newargs[i])
|
|
llvm_lto = eval(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--closure'):
|
|
check_bad_eq(newargs[i])
|
|
closure = int(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--js-transform'):
|
|
check_bad_eq(newargs[i])
|
|
js_transform = newargs[i+1]
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--pre-js'):
|
|
check_bad_eq(newargs[i])
|
|
pre_js += open(newargs[i+1]).read() + '\n'
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--post-js'):
|
|
check_bad_eq(newargs[i])
|
|
post_js += open(newargs[i+1]).read() + '\n'
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--minify'):
|
|
check_bad_eq(newargs[i])
|
|
assert newargs[i+1] == '0', '0 is the only supported option for --minify; 1 has been deprecated'
|
|
debug_level = max(1, debug_level)
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--split'):
|
|
check_bad_eq(newargs[i])
|
|
split_js_file = int(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('-g'):
|
|
requested_level = newargs[i][2:] or '3'
|
|
debug_level = validate_arg_level(requested_level, 4, 'Invalid debug level: ' + newargs[i])
|
|
newargs[i] = '-g' # we'll need this to get LLVM debug info
|
|
elif newargs[i] == '--bind':
|
|
bind = True
|
|
newargs[i] = ''
|
|
if default_cxx_std:
|
|
default_cxx_std = '-std=c++11' # Force C++11 for embind code, but only if user has not explicitly overridden a standard.
|
|
elif newargs[i].startswith('-std='):
|
|
default_cxx_std = '' # User specified a standard to use, clear Emscripten from specifying it.
|
|
elif newargs[i].startswith('--embed-file'):
|
|
check_bad_eq(newargs[i])
|
|
embed_files.append(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--preload-file'):
|
|
check_bad_eq(newargs[i])
|
|
preload_files.append(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--exclude-file'):
|
|
check_bad_eq(newargs[i])
|
|
exclude_files.append(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--compression'):
|
|
logging.warning('--compression is deprecated. Instead, it is recommended you use native gzip compression in your webserver')
|
|
check_bad_eq(newargs[i])
|
|
parts = newargs[i+1].split(',')
|
|
assert len(parts) == 3, '--compression requires specifying native_encoder,js_decoder,js_name - see emcc --help. got: %s' % newargs[i+1]
|
|
def locate(tool):
|
|
if WINDOWS:
|
|
if os.path.exists(tool+'.exe'):
|
|
return tool+'.exe'
|
|
if os.path.exists(tool+'.bat'):
|
|
return tool+'.bat'
|
|
if os.path.exists(tool+'.cmd'):
|
|
return tool+'.cmd'
|
|
return tool
|
|
Compression.encoder = locate(parts[0])
|
|
Compression.decoder = locate(parts[1])
|
|
Compression.js_name = parts[2]
|
|
assert os.path.exists(Compression.encoder), 'native encoder %s does not exist' % Compression.encoder
|
|
assert os.path.exists(Compression.decoder), 'js decoder %s does not exist' % Compression.decoder
|
|
Compression.on = True
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--use-preload-cache'):
|
|
use_preload_cache = True
|
|
newargs[i] = ''
|
|
elif newargs[i].startswith('--no-heap-copy'):
|
|
no_heap_copy = True
|
|
newargs[i] = ''
|
|
elif newargs[i] == '--ignore-dynamic-linking':
|
|
ignore_dynamic_linking = True
|
|
newargs[i] = ''
|
|
elif newargs[i] == '-v':
|
|
shared.COMPILER_OPTS += ['-v']
|
|
os.environ['EMCC_DEBUG'] = '1' # send to child processes too
|
|
if DEBUG != 1:
|
|
# swap in debug logging
|
|
DEBUG = 1
|
|
shared.set_logging()
|
|
logging.debug('invocation: ' + ' '.join(sys.argv))
|
|
shared.apply_configuration() # reset config to pick up change
|
|
shared.check_sanity(force=True)
|
|
newargs[i] = ''
|
|
elif newargs[i].startswith('--shell-file'):
|
|
check_bad_eq(newargs[i])
|
|
shell_path = newargs[i+1]
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i].startswith('--js-library'):
|
|
check_bad_eq(newargs[i])
|
|
js_libraries.append(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i] == '--remove-duplicates':
|
|
logging.warning('--remove-duplicates is deprecated as it is no longer needed. If you cannot link without it, file a bug with a testcase')
|
|
newargs[i] = ''
|
|
elif newargs[i] == '--jcache':
|
|
logging.warning('jcache is deprecated')
|
|
jcache = True
|
|
newargs[i] = ''
|
|
elif newargs[i] == '--clear-cache':
|
|
newargs[i] = ''
|
|
logging.warning('clearing cache')
|
|
shared.Cache.erase()
|
|
shared.check_sanity(force=True) # this is a good time for a sanity check
|
|
sys.exit(0)
|
|
elif newargs[i] == '--save-bc':
|
|
check_bad_eq(newargs[i])
|
|
save_bc = newargs[i+1]
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i] == '--memory-init-file':
|
|
check_bad_eq(newargs[i])
|
|
memory_init_file = int(newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i] == '--proxy-to-worker':
|
|
proxy_to_worker = True
|
|
newargs[i] = ''
|
|
elif newargs[i].startswith(('-I', '-L')):
|
|
path_name = newargs[i][2:]
|
|
if not absolute_warning_shown and os.path.isabs(path_name):
|
|
logging.warning('-I or -L of an absolute path "' + newargs[i] + '" encountered. If this is to a local system header/library, it may cause problems (local system files make sense for compiling natively on your system, but not necessarily to JavaScript). Pass \'-Wno-warn-absolute-paths\' to emcc to hide this warning.') # Of course an absolute path to a non-system-specific library or header is fine, and you can ignore this warning. The danger are system headers that are e.g. x86 specific and nonportable. The emscripten bundled headers are modified to be portable, local system ones are generally not
|
|
absolute_warning_shown = True
|
|
elif newargs[i] == '--emrun':
|
|
emrun = True
|
|
newargs[i] = ''
|
|
elif newargs[i] == '--em-config':
|
|
# This option is parsed in tools/shared.py, here only clean it up from being passed to clang.
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
elif newargs[i] == '--default-obj-ext':
|
|
newargs[i] = ''
|
|
default_object_extension = newargs[i+1]
|
|
if not default_object_extension.startswith('.'):
|
|
default_object_extension = '.' + default_object_extension
|
|
newargs[i+1] = ''
|
|
|
|
newargs = [arg for arg in newargs if arg is not '']
|
|
|
|
# If user did not specify a default -std for C++ code, specify the emscripten default.
|
|
if default_cxx_std:
|
|
newargs = newargs + [default_cxx_std]
|
|
|
|
if emrun:
|
|
pre_js += open(shared.path_from_root('src', 'emrun_prejs.js')).read() + '\n'
|
|
post_js += open(shared.path_from_root('src', 'emrun_postjs.js')).read() + '\n'
|
|
|
|
if js_opts is None: js_opts = opt_level >= 2
|
|
if llvm_opts is None: llvm_opts = LLVM_OPT_LEVEL[opt_level]
|
|
if opt_level == 0: debug_level = 4
|
|
|
|
if llvm_lto is None and bind:
|
|
logging.debug('running lto for embind') # XXX this is a workaround for a pointer issue
|
|
llvm_lto = 1
|
|
|
|
# TODO: support source maps with js_transform
|
|
if js_transform and debug_level >= 4:
|
|
logging.warning('disabling source maps because a js transform is being done')
|
|
debug_level = 3
|
|
|
|
if DEBUG: start_time = time.time() # done after parsing arguments, which might affect debug state
|
|
|
|
if closure:
|
|
assert os.path.exists(shared.CLOSURE_COMPILER), logging.error('fatal: Closure compiler (%s) does not exist', shared.CLOSURE_COMPILER)
|
|
|
|
for i in range(len(newargs)):
|
|
if newargs[i] == '-s':
|
|
if is_minus_s_for_emcc(newargs, i):
|
|
settings_changes.append(newargs[i+1])
|
|
newargs[i] = newargs[i+1] = ''
|
|
elif newargs[i].startswith('--typed-arrays'):
|
|
assert '=' not in newargs[i], 'Invalid typed arrays parameter (do not use "=")'
|
|
settings_changes.append('USE_TYPED_ARRAYS=' + newargs[i+1])
|
|
newargs[i] = ''
|
|
newargs[i+1] = ''
|
|
newargs = [arg for arg in newargs if arg is not '']
|
|
|
|
if split_js_file:
|
|
settings_changes.append("PRINT_SPLIT_FILE_MARKER=1")
|
|
|
|
# Find input files
|
|
|
|
input_files = []
|
|
has_source_inputs = False
|
|
has_header_inputs = False
|
|
lib_dirs = [shared.path_from_root('system', 'local', 'lib'),
|
|
shared.path_from_root('system', 'lib')]
|
|
libs = []
|
|
for i in range(len(newargs)): # find input files XXX this a simple heuristic. we should really analyze based on a full understanding of gcc params,
|
|
# right now we just assume that what is left contains no more |-x OPT| things
|
|
arg = newargs[i]
|
|
|
|
if i > 0:
|
|
prev = newargs[i-1]
|
|
if prev in ['-MT', '-MF', '-MQ', '-D', '-U', '-o', '-x', '-Xpreprocessor', '-include', '-imacros', '-idirafter', '-iprefix', '-iwithprefix', '-iwithprefixbefore', '-isysroot', '-imultilib', '-A', '-isystem', '-iquote', '-install_name', '-compatibility_version', '-current_version', '-I', '-L']: continue # ignore this gcc-style argument
|
|
|
|
if os.path.islink(arg) and os.path.realpath(arg).endswith(SOURCE_ENDINGS + BITCODE_ENDINGS + DYNAMICLIB_ENDINGS + ASSEMBLY_ENDINGS + HEADER_ENDINGS):
|
|
arg = os.path.realpath(arg)
|
|
|
|
if not arg.startswith('-'):
|
|
if not os.path.exists(arg):
|
|
logging.error('%s: No such file or directory ("%s" was expected to be an input file, based on the commandline arguments provided)', arg, arg)
|
|
exit(1)
|
|
|
|
arg_ending = filename_type_ending(arg)
|
|
if arg_ending.endswith(SOURCE_ENDINGS + BITCODE_ENDINGS + DYNAMICLIB_ENDINGS + ASSEMBLY_ENDINGS + HEADER_ENDINGS) or shared.Building.is_ar(arg): # we already removed -o <target>, so all these should be inputs
|
|
newargs[i] = ''
|
|
if arg_ending.endswith(SOURCE_ENDINGS):
|
|
input_files.append(arg)
|
|
has_source_inputs = True
|
|
elif arg_ending.endswith(HEADER_ENDINGS):
|
|
input_files.append(arg)
|
|
has_header_inputs = True
|
|
elif arg_ending.endswith(ASSEMBLY_ENDINGS) or shared.Building.is_bitcode(arg): # this should be bitcode, make sure it is valid
|
|
input_files.append(arg)
|
|
elif arg_ending.endswith(STATICLIB_ENDINGS + DYNAMICLIB_ENDINGS):
|
|
# if it's not, and it's a library, just add it to libs to find later
|
|
l = unsuffixed_basename(arg)
|
|
for prefix in LIB_PREFIXES:
|
|
if not prefix: continue
|
|
if l.startswith(prefix):
|
|
l = l[len(prefix):]
|
|
break
|
|
libs.append(l)
|
|
newargs[i] = ''
|
|
else:
|
|
logging.warning(arg + ' is not valid LLVM bitcode')
|
|
elif arg_ending.endswith(STATICLIB_ENDINGS):
|
|
if not shared.Building.is_ar(arg):
|
|
if shared.Building.is_bitcode(arg):
|
|
logging.error(arg + ': File has a suffix of a static library ' + str(STATICLIB_ENDINGS) + ', but instead is an LLVM bitcode file! When linking LLVM bitcode files, use one of the suffixes ' + str(BITCODE_ENDINGS))
|
|
else:
|
|
logging.error(arg + ': Unknown format, not a static library!')
|
|
exit(1)
|
|
else:
|
|
logging.error(arg + ": Input file has an unknown suffix, don't know what to do with it!")
|
|
exit(1)
|
|
elif arg.startswith('-L'):
|
|
lib_dirs.append(arg[2:])
|
|
newargs[i] = ''
|
|
elif arg.startswith('-l'):
|
|
libs.append(arg[2:])
|
|
newargs[i] = ''
|
|
|
|
original_input_files = input_files[:]
|
|
|
|
newargs = [arg for arg in newargs if arg is not '']
|
|
|
|
# -c means do not link in gcc, and for us, the parallel is to not go all the way to JS, but stop at bitcode
|
|
has_dash_c = '-c' in newargs
|
|
if has_dash_c:
|
|
assert has_source_inputs or has_header_inputs, 'Must have source code or header inputs to use -c'
|
|
target = target_basename + '.o'
|
|
final_suffix = 'o'
|
|
|
|
# Find library files
|
|
for lib in libs:
|
|
logging.debug('looking for library "%s"', lib)
|
|
found = False
|
|
for prefix in LIB_PREFIXES:
|
|
for suff in STATICLIB_ENDINGS + DYNAMICLIB_ENDINGS:
|
|
name = prefix + lib + suff
|
|
for lib_dir in lib_dirs:
|
|
path = os.path.join(lib_dir, name)
|
|
if os.path.exists(path):
|
|
logging.debug('found library "%s" at %s', lib, path)
|
|
input_files.append(path)
|
|
found = True
|
|
break
|
|
if found: break
|
|
if found: break
|
|
if not found: logging.warning('emcc: cannot find library "%s"', lib)
|
|
|
|
# If not compiling to JS, then we are compiling to an intermediate bitcode objects or library, so
|
|
# ignore dynamic linking, since multiple dynamic linkings can interfere with each other
|
|
if not filename_type_suffix(target) in JS_CONTAINING_SUFFIXES or ignore_dynamic_linking:
|
|
def check(input_file):
|
|
if filename_type_ending(input_file) in DYNAMICLIB_ENDINGS:
|
|
if not ignore_dynamic_linking: logging.warning('ignoring dynamic library %s because not compiling to JS or HTML, remember to link it when compiling to JS or HTML at the end', os.path.basename(input_file))
|
|
return False
|
|
else:
|
|
return True
|
|
input_files = [input_file for input_file in input_files if check(input_file)]
|
|
|
|
if len(input_files) == 0:
|
|
logging.error('no input files\nnote that input files without a known suffix are ignored, make sure your input files end with one of: ' + str(SOURCE_ENDINGS + BITCODE_ENDINGS + DYNAMICLIB_ENDINGS + STATICLIB_ENDINGS + ASSEMBLY_ENDINGS + HEADER_ENDINGS))
|
|
exit(0)
|
|
|
|
newargs = CC_ADDITIONAL_ARGS + newargs
|
|
|
|
assert not (Compression.on and final_suffix != 'html'), 'Compression only works when generating HTML'
|
|
|
|
# If we are using embind and generating JS, now is the time to link in bind.cpp
|
|
if bind and final_suffix in JS_CONTAINING_SUFFIXES:
|
|
input_files.append(shared.path_from_root('system', 'lib', 'embind', 'bind.cpp'))
|
|
|
|
# Apply optimization level settings
|
|
shared.Settings.apply_opt_level(opt_level, noisy=True)
|
|
|
|
# Apply -s settings in newargs here (after optimization levels, so they can override them)
|
|
for change in settings_changes:
|
|
key, value = change.split('=')
|
|
if value[0] == '@':
|
|
value = '"@' + os.path.abspath(value[1:]) + '"'
|
|
value = value.replace('\\\\', '/').replace('\\', '/') # Convert backslash paths to forward slashes on Windows as well, since the JS compiler otherwise needs the backslashes escaped (alternative is to escape all input paths passing to JS, which feels clumsier to read)
|
|
exec('shared.Settings.' + key + ' = ' + value)
|
|
|
|
# Apply effects from settings
|
|
if bind and shared.Settings.ASM_JS:
|
|
logging.warning('disabling asm.js since embind is not ready for it yet')
|
|
shared.Settings.ASM_JS = 0
|
|
|
|
fastcomp = os.environ.get('EMCC_FAST_COMPILER') != '0'
|
|
|
|
if fastcomp:
|
|
shared.Settings.ASM_JS = 1 if opt_level > 0 else 2
|
|
try:
|
|
assert shared.Settings.UNALIGNED_MEMORY == 0, 'forced unaligned memory not supported in fastcomp'
|
|
assert shared.Settings.CHECK_HEAP_ALIGN == 0, 'check heap align not supported in fastcomp yet'
|
|
assert shared.Settings.SAFE_DYNCALLS == 0, 'safe dyncalls not supported in fastcomp'
|
|
assert shared.Settings.ASM_HEAP_LOG == 0, 'asm heap log not supported in fastcomp'
|
|
assert shared.Settings.LABEL_DEBUG == 0, 'label debug not supported in fastcomp'
|
|
assert shared.Settings.EXECUTION_TIMEOUT == -1, 'execution timeout not supported in fastcomp'
|
|
assert shared.Settings.NAMED_GLOBALS == 0, 'named globals not supported in fastcomp'
|
|
assert shared.Settings.PGO == 0, 'pgo not supported in fastcomp'
|
|
assert shared.Settings.TARGET_ASMJS_UNKNOWN_EMSCRIPTEN == 1, 'fastcomp requires asmjs-unknown-emscripten'
|
|
assert shared.Settings.USE_TYPED_ARRAYS == 2, 'fastcomp assumes ta2'
|
|
assert not split_js_file, '--split-js is deprecated and not supported in fastcomp'
|
|
assert not bind, 'embind not supported in fastcomp yet'
|
|
assert shared.Settings.MAX_SETJMPS == 20, 'changing MAX_SETJMPS is not supported in fastcomp yet'
|
|
assert shared.Settings.INIT_HEAP == 0, 'HEAP_INIT is not supported in fastcomp (and should never be needed except for debugging)'
|
|
assert not shared.Settings.RUNTIME_TYPE_INFO, 'RUNTIME_TYPE_INFO is not supported in fastcomp'
|
|
assert not shared.Settings.CORRUPTION_CHECK, 'CORRUPTION_CHECK is not supported in asm.js mode, which is what fastcomp can emit (you can use non-asm.js mode in non-fastcomp)'
|
|
except Exception, e:
|
|
logging.error('Compiler settings are incompatible with fastcomp. You can fall back to the older compiler core, although that is not recommended, see https://github.com/kripken/emscripten/wiki/LLVM-Backend')
|
|
raise e
|
|
|
|
if jcache:
|
|
logging.warning('jcache is deprecated and not supported in fastcomp (you should not need it anyhow), disabling')
|
|
jcache = False
|
|
|
|
fastcomp_opts = ['-pnacl-abi-simplify-preopt', '-pnacl-abi-simplify-postopt']
|
|
if shared.Settings.DISABLE_EXCEPTION_CATCHING != 1:
|
|
fastcomp_opts += ['-enable-emscripten-cxx-exceptions']
|
|
if len(shared.Settings.EXCEPTION_CATCHING_WHITELIST) > 0:
|
|
fastcomp_opts += ['-emscripten-cxx-exceptions-whitelist=' + ','.join(shared.Settings.EXCEPTION_CATCHING_WHITELIST)]
|
|
|
|
if shared.Settings.ASM_JS:
|
|
assert opt_level >= 1 or fastcomp, 'asm.js requires -O1 or above'
|
|
|
|
if bind:
|
|
shared.Settings.RESERVED_FUNCTION_POINTERS = max(shared.Settings.RESERVED_FUNCTION_POINTERS, 10)
|
|
if shared.Settings.CORRECT_SIGNS != 1:
|
|
logging.warning('setting CORRECT_SIGNS to 1 for asm.js code generation')
|
|
shared.Settings.CORRECT_SIGNS = 1
|
|
if shared.Settings.CORRECT_OVERFLOWS != 1:
|
|
logging.warning('setting CORRECT_OVERFLOWS to 1 for asm.js code generation')
|
|
shared.Settings.CORRECT_OVERFLOWS = 1
|
|
assert not shared.Settings.PGO, 'cannot run PGO in ASM_JS mode'
|
|
|
|
if shared.Settings.SAFE_HEAP and not js_opts:
|
|
js_opts = True
|
|
logging.warning('enabling js opts to allow SAFE_HEAP to work properly')
|
|
|
|
if shared.Settings.ALLOW_MEMORY_GROWTH:
|
|
logging.warning('Disabling asm.js validation for memory growth (memory can grow, but you lose some amount of speed)');
|
|
shared.Settings.ASM_JS = 2
|
|
|
|
if shared.Settings.CORRECT_SIGNS >= 2 or shared.Settings.CORRECT_OVERFLOWS >= 2 or shared.Settings.CORRECT_ROUNDINGS >= 2:
|
|
debug_level = 4 # must keep debug info to do line-by-line operations
|
|
|
|
if debug_level > 1 and closure:
|
|
logging.warning('disabling closure because debug info was requested')
|
|
closure = False
|
|
|
|
assert shared.LLVM_TARGET in shared.COMPILER_OPTS
|
|
if shared.LLVM_TARGET == 'i386-pc-linux-gnu':
|
|
shared.Settings.TARGET_X86 = 1
|
|
shared.Settings.TARGET_ASMJS_UNKNOWN_EMSCRIPTEN = 0
|
|
assert 'asmjs-unknown-emscripten' not in shared.COMPILER_OPTS
|
|
elif shared.LLVM_TARGET == 'asmjs-unknown-emscripten' or \
|
|
shared.LLVM_TARGET == 'le32-unknown-nacl':
|
|
# For temporary compatibility, treat 'le32-unknown-nacl' as 'asmjs-unknown-emscripten'.
|
|
shared.Settings.TARGET_ASMJS_UNKNOWN_EMSCRIPTEN = 1
|
|
shared.Settings.TARGET_X86 = 0
|
|
assert 'i386-pc-linux-gnu' not in shared.COMPILER_OPTS
|
|
else:
|
|
raise Exception('unknown llvm target: ' + str(shared.LLVM_TARGET))
|
|
|
|
if shared.Settings.USE_TYPED_ARRAYS != 2 and llvm_opts > 0:
|
|
logging.warning('disabling LLVM optimizations, need typed arrays mode 2 for them')
|
|
llvm_opts = 0
|
|
|
|
if shared.Settings.MAIN_MODULE:
|
|
assert not shared.Settings.SIDE_MODULE
|
|
shared.Settings.INCLUDE_FULL_LIBRARY = 1
|
|
elif shared.Settings.SIDE_MODULE:
|
|
assert not shared.Settings.MAIN_MODULE
|
|
|
|
if shared.Settings.MAIN_MODULE or shared.Settings.SIDE_MODULE:
|
|
assert not memory_init_file, 'memory init file is not supported with module linking'
|
|
assert shared.Settings.ASM_JS, 'module linking requires asm.js output (-s ASM_JS=1)'
|
|
shared.Settings.LINKABLE = 1 # TODO: add FORCE_DCE option for the brave people that do want to dce here and in side modules
|
|
debug_level = max(debug_level, 2)
|
|
|
|
if not fastcomp and shared.Settings.ASSERTIONS and shared.Settings.ALIASING_FUNCTION_POINTERS:
|
|
logging.warning('ALIASING_FUNCTION_POINTERS is on, function pointer comparisons may be invalid across types')
|
|
|
|
if shared.Settings.STB_IMAGE and final_suffix in JS_CONTAINING_SUFFIXES:
|
|
input_files.append(shared.path_from_root('third_party', 'stb_image.c'))
|
|
shared.Settings.EXPORTED_FUNCTIONS += ['_stbi_load', '_stbi_load_from_memory', '_stbi_image_free']
|
|
|
|
if type(shared.Settings.EXPORTED_FUNCTIONS) in (list, tuple):
|
|
# always need malloc and free to be kept alive and exported, for internal use and other modules
|
|
for required_export in ['_malloc', '_free']:
|
|
if required_export not in shared.Settings.EXPORTED_FUNCTIONS:
|
|
shared.Settings.EXPORTED_FUNCTIONS.append(required_export)
|
|
else:
|
|
logging.debug('using response file for EXPORTED_FUNCTIONS, make sure it includes _malloc and _free')
|
|
|
|
if shared.Settings.ASM_JS and shared.Settings.DLOPEN_SUPPORT:
|
|
assert shared.Settings.DISABLE_EXCEPTION_CATCHING, 'no exceptions support with dlopen in asm yet'
|
|
|
|
if proxy_to_worker:
|
|
shared.Settings.PROXY_TO_WORKER = 1
|
|
|
|
if js_opts:
|
|
shared.Settings.RUNNING_JS_OPTS = 1
|
|
|
|
shared.Settings.EMSCRIPTEN_VERSION = shared.EMSCRIPTEN_VERSION
|
|
shared.Settings.OPT_LEVEL = opt_level
|
|
shared.Settings.DEBUG_LEVEL = debug_level
|
|
|
|
## Compile source code to bitcode
|
|
|
|
logging.debug('compiling to bitcode')
|
|
|
|
temp_files = []
|
|
|
|
log_time('parse arguments and setup')
|
|
|
|
# Precompiled headers support
|
|
if has_header_inputs:
|
|
for header in input_files:
|
|
assert header.endswith(HEADER_ENDINGS), 'if you have one header input, we assume you want to precompile headers, and cannot have source files or other inputs as well: ' + str(input_files) + ' : ' + header
|
|
args = newargs + shared.EMSDK_CXX_OPTS + input_files
|
|
logging.debug("running (for precompiled headers: " + call + ' ' + ' '.join(args))
|
|
execute([call] + args) # let compiler frontend print directly, so colors are saved (PIPE kills that)
|
|
sys.exit(1)
|
|
|
|
# First, generate LLVM bitcode. For each input file, we get base.o with bitcode
|
|
for input_file in input_files:
|
|
file_ending = filename_type_ending(input_file)
|
|
if file_ending.endswith(SOURCE_ENDINGS):
|
|
logging.debug('compiling source file: ' + input_file)
|
|
input_file = shared.Building.preprocess(input_file, in_temp(uniquename(input_file)))
|
|
output_file = in_temp(unsuffixed(uniquename(input_file)) + '.o')
|
|
temp_files.append(output_file)
|
|
args = newargs + ['-emit-llvm', '-c', input_file, '-o', output_file]
|
|
if file_ending.endswith(CXX_ENDINGS):
|
|
args += shared.EMSDK_CXX_OPTS
|
|
logging.debug("running: " + call + ' ' + ' '.join(args))
|
|
execute([call] + args) # let compiler frontend print directly, so colors are saved (PIPE kills that)
|
|
if not os.path.exists(output_file):
|
|
logging.error('compiler frontend failed to generate LLVM bitcode, halting')
|
|
sys.exit(1)
|
|
else: # bitcode
|
|
if file_ending.endswith(BITCODE_ENDINGS):
|
|
logging.debug('copying bitcode file: ' + input_file)
|
|
temp_file = in_temp(unsuffixed(uniquename(input_file)) + '.o')
|
|
shutil.copyfile(input_file, temp_file)
|
|
temp_files.append(temp_file)
|
|
elif file_ending.endswith(DYNAMICLIB_ENDINGS) or shared.Building.is_ar(input_file):
|
|
logging.debug('copying library file: ' + input_file)
|
|
temp_file = in_temp(uniquename(input_file))
|
|
shutil.copyfile(input_file, temp_file)
|
|
temp_files.append(temp_file)
|
|
elif file_ending.endswith(ASSEMBLY_ENDINGS):
|
|
if not LEAVE_INPUTS_RAW:
|
|
# Note that by assembling the .ll file, then disassembling it later, we will
|
|
# remove annotations which is a good thing for compilation time
|
|
logging.debug('assembling assembly file: ' + input_file)
|
|
temp_file = in_temp(unsuffixed(uniquename(input_file)) + '.o')
|
|
shared.Building.llvm_as(input_file, temp_file)
|
|
temp_files.append(temp_file)
|
|
else:
|
|
logging.error(input_file + ': Unknown file suffix when compiling to LLVM bitcode!')
|
|
sys.exit(1)
|
|
|
|
log_time('bitcodeize inputs')
|
|
|
|
if not LEAVE_INPUTS_RAW:
|
|
assert len(temp_files) == len(input_files)
|
|
|
|
# Optimize source files
|
|
if llvm_opts > 0:
|
|
for i, input_file in enumerate(input_files):
|
|
file_ending = filename_type_ending(input_file)
|
|
if file_ending.endswith(SOURCE_ENDINGS):
|
|
temp_file = temp_files[i]
|
|
logging.debug('optimizing %s with -O%s', input_file, llvm_opts)
|
|
shared.Building.llvm_opt(temp_file, llvm_opts)
|
|
|
|
# If we were just asked to generate bitcode, stop there
|
|
if final_suffix not in JS_CONTAINING_SUFFIXES:
|
|
if not specified_target:
|
|
for input_file in input_files:
|
|
shutil.move(in_temp(unsuffixed(uniquename(input_file)) + '.o'), unsuffixed_basename(input_file) + '.' + final_suffix)
|
|
else:
|
|
if len(input_files) == 1:
|
|
temp_output_base = in_temp(unsuffixed(uniquename(input_files[0])))
|
|
if specified_target.endswith('/') or specified_target.endswith('\\') or os.path.isdir(specified_target): # User passed '-o <directory' as the location to output to.
|
|
obj_output_name = os.path.join(specified_target, os.path.splitext(os.path.basename(input_file))[0] + default_object_extension)
|
|
logging.debug('User specified -o <directoryname> as the location of the output. Generating output file ' + obj_output_name)
|
|
try:
|
|
shutil.move(temp_output_base + '.o', obj_output_name)
|
|
except IOError, e:
|
|
logging.error('Could not write to output file ' + obj_output_name + '. Perhaps the output directory does not exist?')
|
|
exit(1)
|
|
else: # User passed '-o <filename>' as the location to output to.
|
|
shutil.move(temp_output_base + '.o', specified_target)
|
|
if os.path.exists(temp_output_base + '.d'):
|
|
# There was a .d file generated, from -MD or -MMD and friends, save a copy of it to where the output resides,
|
|
# adjusting the target name away from the temporary file name to the specified target.
|
|
# It will be deleted with the rest of the temporary directory.
|
|
deps = open(temp_output_base + '.d').read()
|
|
deps = deps.replace(temp_output_base + '.o', specified_target)
|
|
with open(os.path.join(os.path.dirname(specified_target), os.path.basename(unsuffixed(input_files[0]) + '.d')), "w") as out_dep:
|
|
out_dep.write(deps)
|
|
else:
|
|
assert len(original_input_files) == 1 or not has_dash_c, 'fatal error: cannot specify -o with -c with multiple files' + str(sys.argv) + ':' + str(original_input_files)
|
|
# We have a specified target (-o <target>), which is not JavaScript or HTML, and
|
|
# we have multiple files: Link them
|
|
logging.debug('link: ' + str(temp_files) + specified_target)
|
|
shared.Building.link(temp_files, specified_target)
|
|
exit(0)
|
|
|
|
log_time('bitcodeize inputs')
|
|
|
|
## Continue on to create JavaScript
|
|
|
|
logging.debug('will generate JavaScript')
|
|
|
|
if not LEAVE_INPUTS_RAW and \
|
|
not shared.Settings.BUILD_AS_SHARED_LIB and \
|
|
not shared.Settings.SIDE_MODULE: # shared libraries/side modules link no C libraries, need them in parent
|
|
extra_files_to_link = system_libs.calculate(temp_files, in_temp, stdout, stderr)
|
|
else:
|
|
extra_files_to_link = []
|
|
|
|
log_time('calculate system libraries')
|
|
|
|
# First, combine the bitcode files if there are several. We must also link if we have a singleton .a
|
|
if len(input_files) + len(extra_files_to_link) > 1 or \
|
|
(not LEAVE_INPUTS_RAW and not (suffix(temp_files[0]) in BITCODE_ENDINGS or suffix(temp_files[0]) in DYNAMICLIB_ENDINGS) and shared.Building.is_ar(temp_files[0])):
|
|
linker_inputs = temp_files + extra_files_to_link
|
|
logging.debug('linking: ' + str(linker_inputs))
|
|
shared.Building.link(linker_inputs, in_temp(target_basename + '.bc'), force_archive_contents=len([temp for temp in temp_files if not temp.endswith(STATICLIB_ENDINGS)]) == 0)
|
|
final = in_temp(target_basename + '.bc')
|
|
else:
|
|
if not LEAVE_INPUTS_RAW:
|
|
shutil.move(temp_files[0], in_temp(target_basename + '.bc'))
|
|
final = in_temp(target_basename + '.bc')
|
|
else:
|
|
final = in_temp(input_files[0])
|
|
shutil.copyfile(input_files[0], final)
|
|
|
|
log_time('link')
|
|
|
|
if DEBUG:
|
|
logging.debug('saving intermediate processing steps to %s', shared.EMSCRIPTEN_TEMP_DIR)
|
|
|
|
intermediate_counter = 0
|
|
def save_intermediate(name=None, suffix='js'):
|
|
global intermediate_counter
|
|
shutil.copyfile(final, os.path.join(shared.EMSCRIPTEN_TEMP_DIR, 'emcc-%d%s.%s' % (intermediate_counter, '' if name is None else '-' + name, suffix)))
|
|
intermediate_counter += 1
|
|
|
|
if not LEAVE_INPUTS_RAW: save_intermediate('basebc', 'bc')
|
|
|
|
# Optimize, if asked to
|
|
if not LEAVE_INPUTS_RAW:
|
|
link_opts = [] if debug_level >= 4 else ['-strip-debug'] # remove LLVM debug if we are not asked for it
|
|
|
|
if llvm_lto >= 2:
|
|
logging.debug('running LLVM opt -O3 as pre-LTO')
|
|
shared.Building.llvm_opt(in_temp(target_basename + '.bc'), ['-O3'])
|
|
if DEBUG: save_intermediate('opt', 'bc')
|
|
|
|
# If we can LTO, do it before dce, since it opens up dce opportunities
|
|
if shared.Building.can_build_standalone() and llvm_lto and llvm_lto != 2 and shared.Building.can_use_unsafe_opts():
|
|
if not shared.Building.can_inline(): link_opts.append('-disable-inlining')
|
|
# do not internalize in std-link-opts - it ignores internalize-public-api-list - and add a manual internalize
|
|
link_opts += ['-disable-internalize'] + shared.Building.get_safe_internalize() + ['-std-link-opts']
|
|
else:
|
|
# At minimum remove dead functions etc., this potentially saves a lot in the size of the generated code (and the time to compile it)
|
|
link_opts += shared.Building.get_safe_internalize() + ['-globaldce']
|
|
|
|
if (not save_bc and not fastcomp) or AUTODEBUG:
|
|
# let llvm opt directly emit ll, to skip writing and reading all the bitcode
|
|
link_opts += ['-S']
|
|
shared.Building.llvm_opt(final, link_opts, final + '.link.ll')
|
|
final = final + '.link.ll'
|
|
if DEBUG: save_intermediate('linktime', 'll')
|
|
else:
|
|
if fastcomp and not save_bc:
|
|
# Simplify LLVM bitcode for fastcomp
|
|
link_opts += fastcomp_opts
|
|
shared.Building.llvm_opt(final, link_opts)
|
|
if DEBUG: save_intermediate('linktime', 'bc')
|
|
if save_bc:
|
|
shutil.copyfile(final, save_bc)
|
|
if fastcomp:
|
|
shared.Building.llvm_opt(final, fastcomp_opts, final + '.adsimp.bc')
|
|
final += '.adsimp.bc'
|
|
if DEBUG: save_intermediate('adsimp', 'bc')
|
|
|
|
# Prepare .ll for Emscripten
|
|
if not LEAVE_INPUTS_RAW:
|
|
if save_bc:
|
|
final = shared.Building.llvm_dis(final, final + '.ll')
|
|
else:
|
|
assert len(input_files) == 1
|
|
if DEBUG and save_bc: save_intermediate('ll', 'll')
|
|
|
|
if AUTODEBUG:
|
|
logging.debug('autodebug')
|
|
execute([shared.PYTHON, shared.AUTODEBUGGER, final, final + '.ad.ll'])
|
|
final += '.ad.ll'
|
|
if DEBUG: save_intermediate('autodebug', 'll')
|
|
|
|
# Simplify bitcode after autodebug
|
|
if fastcomp and (AUTODEBUG or LEAVE_INPUTS_RAW):
|
|
shared.Building.llvm_opt(final, fastcomp_opts, final + '.adsimp.bc')
|
|
final += '.adsimp.bc'
|
|
if DEBUG: save_intermediate('adsimp', 'bc')
|
|
|
|
log_time('post-link')
|
|
|
|
# Emscripten
|
|
logging.debug('LLVM => JS')
|
|
extra_args = [] if not js_libraries else ['--libraries', ','.join(map(os.path.abspath, js_libraries))]
|
|
if jcache: extra_args.append('--jcache')
|
|
final = shared.Building.emscripten(final, append_ext=False, extra_args=extra_args)
|
|
if DEBUG: save_intermediate('original')
|
|
|
|
log_time('emscript (llvm=>js)')
|
|
|
|
# Embed and preload files
|
|
if len(preload_files) + len(embed_files) > 0:
|
|
logging.debug('setting up files')
|
|
file_args = []
|
|
if len(preload_files) > 0:
|
|
file_args.append('--preload')
|
|
file_args += preload_files
|
|
if len(embed_files) > 0:
|
|
file_args.append('--embed')
|
|
file_args += embed_files
|
|
if len(exclude_files) > 0:
|
|
file_args.append('--exclude')
|
|
file_args += exclude_files
|
|
if Compression.on:
|
|
file_args += ['--compress', Compression.encoder, Compression.decoder, Compression.js_name]
|
|
if use_preload_cache:
|
|
file_args.append('--use-preload-cache')
|
|
if no_heap_copy:
|
|
file_args.append('--no-heap-copy')
|
|
file_code = execute([shared.PYTHON, shared.FILE_PACKAGER, unsuffixed(target) + '.data'] + file_args, stdout=PIPE)[0]
|
|
pre_js = file_code + pre_js
|
|
|
|
# Apply pre and postjs files
|
|
if pre_js or post_js:
|
|
logging.debug('applying pre/postjses')
|
|
src = open(final).read()
|
|
final += '.pp.js'
|
|
open(final, 'w').write(pre_js + src + post_js)
|
|
if DEBUG: save_intermediate('pre-post')
|
|
|
|
# Add bindings glue if used
|
|
if bind:
|
|
logging.debug('adding embind glue')
|
|
src = open(final).read().replace('// {{PRE_RUN_ADDITIONS}}', '// {{PRE_RUN_ADDITIONS}}\n' +
|
|
open(shared.path_from_root('src', 'embind', 'embind.js')).read() +
|
|
open(shared.path_from_root('src', 'embind', 'emval.js')).read()
|
|
)
|
|
final += '.bd.js'
|
|
open(final, 'w').write(src)
|
|
if DEBUG: save_intermediate('bind')
|
|
|
|
# Apply a source code transformation, if requested
|
|
if js_transform:
|
|
shutil.copyfile(final, final + '.tr.js')
|
|
final += '.tr.js'
|
|
posix = True if not shared.WINDOWS else False
|
|
logging.debug('applying transform: %s', js_transform)
|
|
subprocess.check_call(shlex.split(js_transform, posix=posix) + [os.path.abspath(final)])
|
|
if DEBUG: save_intermediate('transformed')
|
|
|
|
js_transform_tempfiles = [final]
|
|
|
|
if memory_init_file:
|
|
if shared.Settings.USE_TYPED_ARRAYS != 2:
|
|
if type(memory_init_file) == int: logging.warning('memory init file requires typed arrays mode 2')
|
|
else:
|
|
memfile = target + '.mem'
|
|
shared.try_delete(memfile)
|
|
def repl(m):
|
|
# handle chunking of the memory initializer
|
|
s = m.groups(0)[0]
|
|
open(memfile, 'wb').write(''.join(map(lambda x: chr(int(x or '0')), s.split(','))))
|
|
if DEBUG:
|
|
# Copy into temp dir as well, so can be run there too
|
|
temp_memfile = os.path.join(shared.EMSCRIPTEN_TEMP_DIR, os.path.basename(memfile))
|
|
if os.path.abspath(memfile) != os.path.abspath(memfile):
|
|
shutil.copyfile(memfile, temp_memfile)
|
|
return 'var memoryInitializer = "%s";' % os.path.basename(memfile)
|
|
src = re.sub(shared.JS.memory_initializer_pattern, repl, open(final).read(), count=1)
|
|
open(final + '.mem.js', 'w').write(src)
|
|
final += '.mem.js'
|
|
src = None
|
|
js_transform_tempfiles[-1] = final # simple text substitution preserves comment line number mappings
|
|
if DEBUG:
|
|
if os.path.exists(memfile):
|
|
save_intermediate('meminit')
|
|
logging.debug('wrote memory initialization to %s', memfile)
|
|
else:
|
|
logging.debug('did not see memory initialization')
|
|
elif shared.Settings.USE_TYPED_ARRAYS == 2 and not shared.Settings.MAIN_MODULE and not shared.Settings.SIDE_MODULE:
|
|
# not writing a binary init, but we can at least optimize them by splitting them up
|
|
src = open(final).read()
|
|
src = shared.JS.optimize_initializer(src)
|
|
if src is not None:
|
|
logging.debug('optimizing memory initialization')
|
|
open(final + '.mem.js', 'w').write(src)
|
|
final += '.mem.js'
|
|
src = None
|
|
|
|
log_time('source transforms')
|
|
|
|
# It is useful to run several js optimizer passes together, to save on unneeded unparsing/reparsing
|
|
js_optimizer_queue = []
|
|
js_optimizer_extra_info = {}
|
|
js_optimizer_queue_history = []
|
|
def flush_js_optimizer_queue():
|
|
global final, js_optimizer_queue, js_optimizer_extra_info, js_optimizer_queue_history
|
|
if len(js_optimizer_extra_info) == 0:
|
|
js_optimizer_extra_info = None
|
|
if len(js_optimizer_queue) > 0 and not(not shared.Settings.ASM_JS and len(js_optimizer_queue) == 1 and js_optimizer_queue[0] == 'last'):
|
|
|
|
def add_opt_args(args):
|
|
if shared.Settings.ASM_JS:
|
|
args = ['asm'] + args
|
|
if shared.Settings.PRECISE_F32:
|
|
args = ['asmPreciseF32'] + args
|
|
return args
|
|
|
|
if DEBUG != '2':
|
|
js_optimizer_queue = add_opt_args(js_optimizer_queue)
|
|
logging.debug('applying js optimization passes: %s', js_optimizer_queue)
|
|
final = shared.Building.js_optimizer(final, js_optimizer_queue, jcache, debug_level >= 4, js_optimizer_extra_info)
|
|
js_transform_tempfiles.append(final)
|
|
if DEBUG: save_intermediate('js_opts')
|
|
else:
|
|
for name in js_optimizer_queue:
|
|
passes = add_opt_args([name])
|
|
if shared.Settings.ASM_JS:
|
|
passes = ['asm'] + passes
|
|
logging.debug('applying js optimization pass: %s', passes)
|
|
final = shared.Building.js_optimizer(final, passes, jcache, debug_level >= 4, js_optimizer_extra_info)
|
|
js_transform_tempfiles.append(final)
|
|
save_intermediate(name)
|
|
js_optimizer_queue_history += js_optimizer_queue
|
|
js_optimizer_queue = []
|
|
js_optimizer_extra_info = {}
|
|
|
|
if opt_level >= 1 and js_opts:
|
|
logging.debug('running pre-closure post-opts')
|
|
|
|
if DEBUG == '2':
|
|
# Clean up the syntax a bit
|
|
final = shared.Building.js_optimizer(final, [], jcache, debug_level >= 4)
|
|
js_transform_tempfiles.append(final)
|
|
if DEBUG: save_intermediate('pretty')
|
|
|
|
def get_eliminate():
|
|
if shared.Settings.ALLOW_MEMORY_GROWTH:
|
|
return 'eliminateMemSafe'
|
|
else:
|
|
return 'eliminate'
|
|
|
|
if opt_level >= 2:
|
|
js_optimizer_queue += [get_eliminate()]
|
|
|
|
if shared.Settings.AGGRESSIVE_VARIABLE_ELIMINATION:
|
|
js_optimizer_queue += ['aggressiveVariableElimination']
|
|
|
|
js_optimizer_queue += ['simplifyExpressions']
|
|
|
|
if opt_level >= 3 and shared.Settings.PRECISE_F32: js_optimizer_queue += ['optimizeFrounds']
|
|
|
|
if closure and not shared.Settings.ASM_JS:
|
|
flush_js_optimizer_queue()
|
|
|
|
logging.debug('running closure')
|
|
# no need to add this to js_transform_tempfiles, because closure and
|
|
# debug_level > 0 are never simultaneously true
|
|
final = shared.Building.closure_compiler(final)
|
|
if DEBUG: save_intermediate('closure')
|
|
|
|
if js_opts:
|
|
if shared.Settings.ASM_JS and shared.Settings.SAFE_HEAP: js_optimizer_queue += ['safeHeap']
|
|
|
|
if shared.Settings.OUTLINING_LIMIT > 0 and shared.Settings.ASM_JS:
|
|
js_optimizer_queue += ['outline']
|
|
js_optimizer_extra_info['sizeToOutline'] = shared.Settings.OUTLINING_LIMIT
|
|
|
|
if opt_level >= 2 and (not closure or shared.Settings.ASM_JS) and shared.Settings.RELOOP and debug_level < 3:
|
|
if shared.Settings.ASM_JS and opt_level >= 3 and shared.Settings.OUTLINING_LIMIT == 0:
|
|
js_optimizer_queue += ['registerizeHarder']
|
|
else:
|
|
js_optimizer_queue += ['registerize']
|
|
|
|
if opt_level >= 2:
|
|
if debug_level < 2 and shared.Settings.ASM_JS: js_optimizer_queue += ['minifyNames']
|
|
if debug_level == 0: js_optimizer_queue += ['minifyWhitespace']
|
|
|
|
if closure and shared.Settings.ASM_JS:
|
|
js_optimizer_queue += ['closure']
|
|
|
|
if not shared.Settings.SIDE_MODULE: js_optimizer_queue += ['last'] # side modules are not finalized until after relocation
|
|
|
|
flush_js_optimizer_queue()
|
|
|
|
log_time('js opts')
|
|
|
|
# Remove some trivial whitespace # TODO: do not run when compress has already been done on all parts of the code
|
|
#src = open(final).read()
|
|
#src = re.sub(r'\n+[ \n]*\n+', '\n', src)
|
|
#open(final, 'w').write(src)
|
|
|
|
def generate_source_map(map_file_base_name, offset=0):
|
|
jsrun.run_js(shared.path_from_root('tools', 'source-maps', 'sourcemapper.js'),
|
|
shared.NODE_JS, js_transform_tempfiles +
|
|
['--sourceRoot', os.getcwd(),
|
|
'--mapFileBaseName', map_file_base_name,
|
|
'--offset', str(offset)])
|
|
|
|
# If we were asked to also generate HTML, do that
|
|
if final_suffix == 'html':
|
|
logging.debug('generating HTML')
|
|
shell = open(shell_path).read()
|
|
assert '{{{ SCRIPT }}}' in shell, 'HTML shell must contain {{{ SCRIPT }}} , see src/shell.html for an example'
|
|
html = open(target, 'w')
|
|
js_target = unsuffixed(target) + '.js'
|
|
base_js_target = os.path.basename(js_target)
|
|
if proxy_to_worker:
|
|
html.write(shell.replace('{{{ SCRIPT }}}', '<script>' + open(shared.path_from_root('src', 'proxyClient.js')).read().replace('{{{ filename }}}', target_basename) + '</script>'))
|
|
shutil.move(final, js_target)
|
|
elif not Compression.on:
|
|
# Normal code generation path
|
|
if debug_level >= 4:
|
|
generate_source_map(target)
|
|
shutil.move(final, js_target)
|
|
need_mods = shared.Settings.PRECISE_F32 == 2
|
|
if not need_mods:
|
|
# Non-modifiable code, just load the code directly
|
|
script_tag = '''<script async type="text/javascript" src="%s"></script>''' % base_js_target
|
|
else:
|
|
# Potentially-modifiable code, load as text, modify, then execute. This lets you
|
|
# patch the code on the client machine right before it is executed, perhaps based
|
|
# on information about the client.
|
|
checks = []
|
|
mods = []
|
|
if shared.Settings.PRECISE_F32 == 2:
|
|
checks.append('!Math.fround')
|
|
if 'minifyNames' not in js_optimizer_queue_history:
|
|
# simple dumb replace
|
|
mods.append('''
|
|
console.log('optimizing out Math.fround calls');
|
|
code = code.replace(/Math_fround\(/g, '(').replace("'use asm'", "'almost asm'")
|
|
''')
|
|
else:
|
|
# minified, not quite so simple - TODO
|
|
mods.append('''
|
|
try {
|
|
console.log('optimizing out Math.fround calls');
|
|
var m = /var ([^=]+)=global\.Math\.fround;/.exec(code);
|
|
var minified = m[1];
|
|
if (!minified) throw 'fail';
|
|
var startAsm = code.indexOf('// EMSCRIPTEN_START_FUNCS');
|
|
var endAsm = code.indexOf('// EMSCRIPTEN_END_FUNCS');
|
|
var asm = code.substring(startAsm, endAsm);
|
|
do {
|
|
var moar = false; // we need to re-do, as x(x( will not be fixed
|
|
asm = asm.replace(new RegExp('[^a-zA-Z0-9\\\\$\\\\_]' + minified + '\\\\(', 'g'), function(s) { moar = true; return s[0] + '(' });
|
|
} while (moar);
|
|
code = code.substring(0, startAsm) + asm + code.substring(endAsm);
|
|
code = code.replace("'use asm'", "'almost asm'");
|
|
} catch(e) { console.log('failed to optimize out Math.fround calls ' + e) }
|
|
''')
|
|
|
|
fixes = ''
|
|
for i in range(len(checks)):
|
|
fixes += 'if (' + checks[i] + ') { ' + mods[i] + ' }\n'
|
|
|
|
# if all the checks are negative, just emit a script tag normally, that's better.
|
|
# otherwise, do an xhr to get the code as text, modify, and load asynchronously
|
|
code = 'if (!(' + ' || '.join(checks) + ''')) {
|
|
var script = document.createElement('script');
|
|
script.src = "''' + base_js_target + '''";
|
|
document.body.appendChild(script);
|
|
} else {
|
|
var codeXHR = new XMLHttpRequest();
|
|
codeXHR.open('GET', '%s', true);
|
|
codeXHR.onload = function() {
|
|
var code = codeXHR.responseText;
|
|
%s
|
|
var blob = new Blob([code], { type: 'text/javascript' });
|
|
codeXHR = null;
|
|
var src = URL.createObjectURL(blob);
|
|
var script = document.createElement('script');
|
|
script.src = URL.createObjectURL(blob);
|
|
script.onload = function() {
|
|
URL.revokeObjectURL(script.src);
|
|
};
|
|
document.body.appendChild(script);
|
|
};
|
|
codeXHR.send(null);
|
|
}
|
|
''' % (base_js_target, fixes)
|
|
script_tag = '''<script>%s</script>''' % code
|
|
html.write(shell.replace('{{{ SCRIPT }}}', script_tag))
|
|
else:
|
|
# Compress the main code
|
|
shutil.move(final, js_target)
|
|
Compression.compress(js_target)
|
|
|
|
# Run the decompressor in a worker, and add code to
|
|
# 1. download the compressed file
|
|
# 2. decompress to a typed array
|
|
# 3. convert to a string of source code
|
|
# 4. insert a script element with that source code (more effective than eval)
|
|
decoding = '''
|
|
var decompressWorker = new Worker('decompress.js');
|
|
var decompressCallbacks = [];
|
|
var decompressions = 0;
|
|
Module["decompress"] = function(data, callback) {
|
|
var id = decompressCallbacks.length;
|
|
decompressCallbacks.push(callback);
|
|
decompressWorker.postMessage({ data: data, id: id });
|
|
if (Module['setStatus']) {
|
|
decompressions++;
|
|
Module['setStatus']('Decompressing...');
|
|
}
|
|
};
|
|
decompressWorker.onmessage = function(event) {
|
|
decompressCallbacks[event.data.id](event.data.data);
|
|
decompressCallbacks[event.data.id] = null;
|
|
if (Module['setStatus']) {
|
|
decompressions--;
|
|
if (decompressions == 0) {
|
|
Module['setStatus']('');
|
|
}
|
|
}
|
|
};
|
|
var compiledCodeXHR = new XMLHttpRequest();
|
|
compiledCodeXHR.open('GET', '%s', true);
|
|
compiledCodeXHR.responseType = 'arraybuffer';
|
|
compiledCodeXHR.onload = function() {
|
|
var arrayBuffer = compiledCodeXHR.response;
|
|
if (!arrayBuffer) throw('Loading compressed code failed.');
|
|
var byteArray = new Uint8Array(arrayBuffer);
|
|
Module.decompress(byteArray, function(decompressed) {
|
|
var source = Array.prototype.slice.apply(decompressed).map(function(x) { return String.fromCharCode(x) }).join(''); // createObjectURL instead?
|
|
var scriptTag = document.createElement('script');
|
|
scriptTag.setAttribute('type', 'text/javascript');
|
|
scriptTag.innerHTML = source;
|
|
document.body.appendChild(scriptTag);
|
|
});
|
|
};
|
|
compiledCodeXHR.send(null);
|
|
''' % Compression.compressed_name(base_js_target)
|
|
html.write(shell.replace('{{{ SCRIPT }}}', '<script>' + decoding + '</script>'))
|
|
|
|
# Add decompressor with web worker glue code
|
|
decompressor = open('decompress.js', 'w')
|
|
decompressor.write(open(Compression.decoder).read())
|
|
decompressor.write('''
|
|
onmessage = function(event) {
|
|
postMessage({ data: %s(event.data.data), id: event.data.id });
|
|
};
|
|
''' % Compression.js_name)
|
|
decompressor.close()
|
|
|
|
html.close()
|
|
else:
|
|
if split_js_file:
|
|
from tools.split import split_javascript_file
|
|
split_javascript_file(final, unsuffixed(target), split_js_file)
|
|
else:
|
|
if debug_level >= 4: generate_source_map(target)
|
|
# copy final JS to output
|
|
shutil.move(final, target)
|
|
|
|
log_time('final emitting')
|
|
|
|
if DEBUG: logging.debug('total time: %.2f seconds', (time.time() - start_time))
|
|
|
|
finally:
|
|
if not TEMP_DIR:
|
|
try:
|
|
shutil.rmtree(temp_dir)
|
|
except:
|
|
pass
|
|
else:
|
|
logging.info('emcc saved files are in:' + temp_dir)
|
|
|