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#!/usr/bin/env python
'''
emcc - compiler helper script
=============================
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
use emar, emld and emranlib 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.
EMMAKEN_JUST_CONFIGURE tells emcc that it is being run in ./configure,
so it should relay everything to gcc/g++. You should not define that when
running make, of course.
* With CMake, the same command will work (with cmake instead of ./configure). You may also be
able to do the following in your CMakeLists.txt:
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SET(CMAKE_C_COMPILER "PATH/emcc")
SET(CMAKE_CXX_COMPILER "PATH/em++")
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SET(CMAKE_LINKER "PATH/emld")
SET(CMAKE_CXX_LINKER "PATH/emld")
SET(CMAKE_C_LINK_EXECUTABLE "PATH/emld")
SET(CMAKE_CXX_LINK_EXECUTABLE "PATH/emld")
SET(CMAKE_AR "PATH/emar")
SET(CMAKE_RANLIB "PATH/emranlib")
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* For SCons the shared.py can be imported like so:
__file__ = str(Dir('#/project_path_to_emscripten/dummy/dummy'))
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__rootpath__ = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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def path_from_root(*pathelems):
return os.path.join(__rootpath__, *pathelems)
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sys.path += [path_from_root('')]
from tools.shared import *
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For using the Emscripten compilers/linkers/etc. you can do:
env = Environment()
...
env.Append(CCFLAGS = COMPILER_OPTS)
env.Replace(LINK = LLVM_LD)
env.Replace(LD = LLVM_LD)
TODO: Document all relevant setup changes
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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
a C++ file with a C extension, in which case CMake can be told
to run g++ on it despite the .c extension, see
https://github.com/kripken/emscripten/issues/6
(If a similar situation occurs with ./configure, you can do the same there too.)
emcc can be influenced by a few environment variables:
EMMAKEN_NO_SDK - Will tell emcc *not* to use the emscripten headers. Instead
your system headers will be used.
EMMAKEN_COMPILER - The compiler to be used, if you don't want the default clang.
'''
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import os, sys, shutil, tempfile, subprocess
from subprocess import PIPE, STDOUT
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from tools import shared
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def execute(cmd, *args, **kw):
try:
return subprocess.Popen(cmd, *args, **kw).communicate() # let compiler frontend print directly, so colors are saved (PIPE kills that)
except:
if not isinstance(cmd, str):
cmd = ' '.join(cmd)
print >> sys.stderr, 'Invoking Process failed: <<< ' + cmd + ' >>>'
raise
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# Mapping of emcc opt levels to llvm opt levels. We use llvm opt level 3 in emcc opt
# levels 2 and 3 (emcc 3 is unsafe opts, so unsuitable for the only level to get
# llvm opt level 3, and speed-wise emcc level 2 is already the slowest/most optimizing
# level)
LLVM_OPT_LEVEL = {
0: 0,
1: 1,
2: 3,
3: 3,
}
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DEBUG = os.environ.get('EMCC_DEBUG')
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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
# Not recommended, this is mainly for the test runner, or if you have some other
# specific need.
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# One major limitation with this mode is that dlmalloc and libc++ cannot be
# 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).
# Note that this will disable inclusion of libraries. This is useful because including
# 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
if DEBUG: print >> sys.stderr, '\nemcc invocation: ', ' '.join(sys.argv), (' + ' + EMCC_CFLAGS if EMCC_CFLAGS else '')
if EMCC_CFLAGS: sys.argv.append(EMCC_CFLAGS)
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if DEBUG and LEAVE_INPUTS_RAW: print >> sys.stderr, 'emcc: leaving inputs raw'
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stdout = PIPE if not DEBUG else None # suppress output of child processes
stderr = PIPE if not DEBUG else None # unless we are in DEBUG mode
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shared.check_sanity()
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# Handle some global flags
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if len(sys.argv) == 1:
print 'emcc: no input files'
exit(0)
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if sys.argv[1] == '--version':
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print '''emcc (Emscripten GCC-like replacement) 2.0
Copyright (C) 2011 the Emscripten authors.
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.
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'''
exit(0)
elif sys.argv[1] == '--help':
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this = os.path.basename('em++' if os.environ.get('EMMAKEN_CXX') else 'emcc')
print '''%s [options] file...
Most normal gcc/g++ options will work, for example:
--help Display this information
--version Display compiler version information
Options that are modified or new in %s include:
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-O0 No optimizations (default)
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-O1 Simple optimizations, including LLVM -O1
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optimizations, and no runtime assertions
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or C++ exception catching (to re-enable
C++ exception catching, use
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-s DISABLE_EXCEPTION_CATCHING=0 ).
Note: Optimizations are only done when
compiling to JavaScript, not to intermediate
bitcode.
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-O2 As -O1, plus the relooper (loop recreation),
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plus closure compiler advanced opts, plus
LLVM -O2 optimizations
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Warning: Compiling with this takes a long time!
-O3 As -O2, plus dangerous optimizations that may
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break the generated code! If that happens, try
-O2 and then adding dangerous optimizations one
by one.
-s OPTION=VALUE JavaScript code generation option passed
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into the emscripten compiler. For the
available options, see src/settings.js
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--typed-arrays <mode> 0: No typed arrays
1: Parallel typed arrays
2: Shared (C-like) typed arrays (default)
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--llvm-opts <level> 0: No LLVM optimizations (default in -O0)
1: -O1 LLVM optimizations (default in -O1)
2: -O2 LLVM optimizations
3: -O3 LLVM optimizations (default in -O2+)
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--closure <on> 0: No closure compiler (default in -O0, -O1)
1: Run closure compiler (default in -O2, -O3)
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--js-transform <cmd> <cmd> will be called on the generated code
before it is optimized. This lets you modify
the JavaScript, for example adding some code
or removing some code, in a way that those
modifications will be optimized together with
the generated code properly. <cmd> will be
called with the filename of the generated
code as a parameter; to modify the code, you
can read the original data and then append to
it or overwrite it with the modified data.
<cmd> is interpreted as a space-separated
list of arguments, for example, <cmd> of
"python processor.py" will cause a python
script to be run.
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--pre-js <file> A file whose contents are added before the
generated code
--post-js <file> A file whose contents are added after the
generated code
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--compress <on> 0: Do not compress the generated JavaScript's
whitespace (default if closure compiler
will not be run)
1: Compress the generated JavaScript's
whitespace (default if closure compiler
will be run). Note that this by itself
will not minify the code (closure does
that)
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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
to access the file in the current directory
with the same basename as given here (that is,
just the filename, without a path to it).
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--preload-file <name> A file to preload before running the
compiled code asynchronously. Otherwise
similar to --embed-file, except that this
option is only relevant when generating
HTML (it uses asynchronous binary XHRs).
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Note that files with typical image suffixes
(png, jpg, bmp) will be preloaded as images.
Their pixel data will be available for SDL_image
to load (IMG_Load), but they will not be
available as normal data files (if you need
the alternative, change the suffix).
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--ignore-dynamic-linking Normally emcc will treat dynamic linking like
static linking, by linking in the code from
the dynamic library. This fails if the same
dynamic library is linked more than once.
With this option, dynamic linking is ignored,
which allows the build system to proceed without
errors. However, you will need to manually
link to the shared libraries later on yourself.
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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
used needs to have this token inside it:
{{{ SCRIPT_CODE }}}
Note that this argument is ignored if a
target other than HTML is specified using
the -o option.
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The target file, if specified (-o <target>), defines what will
be generated:
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<name>.js JavaScript (default)
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<name>.html HTML with embedded JavaScript
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<name>.bc LLVM bitcode
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<name>.o LLVM bitcode (same as .bc)
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The -c option (which tells gcc not to run the linker) will
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cause LLVM bitcode to be generated, as %s only generates
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JavaScript in the final linking stage of building.
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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.
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emcc is affected by several environment variables. For details, view
the source of emcc (search for 'os.environ').
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''' % (this, this, this)
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exit(0)
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# 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)
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CONFIGURE_CONFIG = os.environ.get('EMMAKEN_JUST_CONFIGURE') or 'conftest.c' in sys.argv
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CMAKE_CONFIG = 'CMakeFiles/cmTryCompileExec.dir' in ' '.join(sys.argv)# or 'CMakeCCompilerId' in ' '.join(sys.argv)
if CONFIGURE_CONFIG or CMAKE_CONFIG:
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compiler = shared.CLANG
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if not ('CXXCompiler' in ' '.join(sys.argv) or os.environ.get('EMMAKEN_CXX')):
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compiler = shared.to_cc(compiler)
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cmd = [compiler] + shared.EMSDK_OPTS + sys.argv[1:]
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if DEBUG: print >> sys.stderr, 'emcc, just configuring: ', compiler, cmd
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exit(os.execvp(compiler, cmd))
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if os.environ.get('EMMAKEN_COMPILER'):
CXX = os.environ['EMMAKEN_COMPILER']
else:
CXX = shared.CLANG
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CC = shared.to_cc(CXX)
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# If we got here from a redirection through emmakenxx.py, then force a C++ compiler here
if os.environ.get('EMMAKEN_CXX'):
CC = CXX
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CC_ADDITIONAL_ARGS = shared.COMPILER_OPTS # + ['-g']?
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EMMAKEN_CFLAGS = os.environ.get('EMMAKEN_CFLAGS')
if EMMAKEN_CFLAGS: CC_ADDITIONAL_ARGS += EMMAKEN_CFLAGS.split(' ')
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# ---------------- Utilities ---------------
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SOURCE_SUFFIXES = ('.c', '.cpp', '.cxx', '.cc')
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BITCODE_SUFFIXES = ('.bc', '.o')
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DYNAMICLIB_SUFFIXES = ('.dylib', '.so', '.dll')
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STATICLIB_SUFFIXES = ('.a',)
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ASSEMBLY_SUFFIXES = ('.ll',)
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LIB_PREFIXES = ('', 'lib')
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IMAGE_SUFFIXES = ('.jpg', '.png', '.bmp')
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def suffix(name):
return name.split('.')[:-1]
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def unsuffixed(name):
return '.'.join(name.split('.')[:-1])
def unsuffixed_basename(name):
return os.path.basename(unsuffixed(name))
# ---------------- End configs -------------
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if len(sys.argv) == 1 or sys.argv[1] in ['x', 't']:
# noop ar
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if DEBUG: print >> sys.stderr, 'emcc, just ar'
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sys.exit(0)
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use_cxx = True
header = False # pre-compiled headers. We fake that by just copying the file
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for i in range(1, len(sys.argv)):
arg = sys.argv[i]
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if not arg.startswith('-'):
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if arg.endswith('.c'):
use_cxx = False
if arg.endswith('.h') and sys.argv[i-1] != '-include':
header = True
# Check if a target is specified
target = None
for i in range(len(sys.argv)-1):
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if sys.argv[i].startswith('-o='):
raise Exception('Invalid syntax: do not use -o=X, use -o X')
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if sys.argv[i] == '-o':
target = sys.argv[i+1]
sys.argv = sys.argv[:i] + sys.argv[i+2:]
break
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if header: # header or such
if DEBUG: print >> sys.stderr, 'Just copy.'
shutil.copy(sys.argv[-1], sys.argv[-2])
exit(0)
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if TEMP_DIR:
temp_dir = TEMP_DIR
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if os.path.exists(temp_dir):
shutil.rmtree(temp_dir) # clear it
os.makedirs(temp_dir)
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else:
temp_dir = tempfile.mkdtemp()
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def in_temp(name):
return os.path.join(temp_dir, name)
try:
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call = CXX if use_cxx else CC
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## Parse args
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newargs = sys.argv[1:]
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opt_level = 0
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llvm_opts = None
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closure = None
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js_transform = None
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pre_js = None
post_js = None
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compress_whitespace = None
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embed_files = []
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preload_files = []
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ignore_dynamic_linking = False
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shell_path = shared.path_from_root('src', 'shell.html')
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def check_bad_eq(arg):
assert '=' not in arg, 'Invalid parameter (do not use "=" with "--" options)'
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for i in range(len(newargs)):
if newargs[i].startswith('-O'):
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try:
opt_level = int(newargs[i][2])
assert 0 <= opt_level <= 3
except:
raise Exception('Invalid optimization level: ' + newargs[i])
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newargs[i] = ''
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elif newargs[i].startswith('--llvm-opts'):
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check_bad_eq(newargs[i])
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llvm_opts = eval(newargs[i+1])
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newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i].startswith('--closure'):
check_bad_eq(newargs[i])
closure = int(newargs[i+1])
newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i].startswith('--js-transform'):
check_bad_eq(newargs[i])
js_transform = newargs[i+1]
newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i].startswith('--pre-js'):
check_bad_eq(newargs[i])
pre_js = open(newargs[i+1]).read()
newargs[i] = ''
newargs[i+1] = ''
elif newargs[i].startswith('--post-js'):
check_bad_eq(newargs[i])
post_js = open(newargs[i+1]).read()
newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i].startswith('--compress'):
check_bad_eq(newargs[i])
compress_whitespace = int(newargs[i+1])
newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i].startswith('--embed-file'):
check_bad_eq(newargs[i])
embed_files.append(newargs[i+1])
newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i].startswith('--preload-file'):
check_bad_eq(newargs[i])
preload_files.append(newargs[i+1])
newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i] == '-MF': # clang cannot handle this, so we fake it
f = open(newargs[i+1], 'w')
f.write('\n')
f.close()
newargs[i] = ''
newargs[i+1] = ''
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elif newargs[i] == '--ignore-dynamic-linking':
ignore_dynamic_linking = True
newargs[i] = ''
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elif newargs[i].startswith('--shell-file'):
check_bad_eq(newargs[i])
shell_path = newargs[i+1]
newargs[i] = ''
newargs[i+1] = ''
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newargs = [ arg for arg in newargs if arg is not '' ]
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if llvm_opts is None: llvm_opts = LLVM_OPT_LEVEL[opt_level]
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if closure is None: closure = 1 if opt_level >= 2 else 0
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if compress_whitespace is None:
compress_whitespace = closure # if closure is run, compress whitespace
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if closure:
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assert os.path.exists(shared.CLOSURE_COMPILER), 'emcc: fatal: Closure compiler (%s) does not exist' % shared.CLOSURE_COMPILER
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settings_changes = []
for i in range(len(newargs)):
if newargs[i] == '-s':
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assert '=' in newargs[i+1], 'Incorrect syntax for -s (use -s OPT=VAL): ' + newargs[i+1]
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settings_changes.append(newargs[i+1])
newargs[i] = newargs[i+1] = ''
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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] = ''
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newargs = [ arg for arg in newargs if arg is not '' ]
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# Find input files
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input_files = []
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has_source_inputs = False
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lib_dirs = []
libs = []
2011-12-14 04:21:03 +04:00
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]
2012-03-08 02:28:13 +04:00
if i > 0:
prev = newargs[i-1]
if prev == '-MT': continue # ignore this gcc-style argument
2012-02-25 08:31:11 +04:00
if arg.endswith(SOURCE_SUFFIXES + BITCODE_SUFFIXES + DYNAMICLIB_SUFFIXES + ASSEMBLY_SUFFIXES) or shared.Building.is_ar(arg): # we already removed -o <target>, so all these should be inputs
2011-12-14 06:23:00 +04:00
newargs[i] = ''
2011-12-17 09:55:39 +04:00
if os.path.exists(arg):
if arg.endswith(SOURCE_SUFFIXES):
2011-12-17 23:49:26 +04:00
input_files.append(arg)
2011-12-17 09:55:39 +04:00
has_source_inputs = True
2011-12-17 23:49:26 +04:00
else:
# this should be bitcode, make sure it is valid
2012-02-03 01:43:06 +04:00
if arg.endswith(ASSEMBLY_SUFFIXES) or shared.Building.is_bitcode(arg):
2011-12-17 23:49:26 +04:00
input_files.append(arg)
else:
2012-02-02 05:43:37 +04:00
print >> sys.stderr, 'emcc: %s: warning: Not valid LLVM bitcode' % arg
2011-12-17 09:55:39 +04:00
else:
2012-02-02 05:43:37 +04:00
print >> sys.stderr, 'emcc: %s: warning: No such file or directory' % arg
2012-02-23 23:14:52 +04:00
elif arg.startswith('-L'):
lib_dirs.append(arg[2:])
newargs[i] = ''
elif arg.startswith('-l'):
libs.append(arg[2:])
newargs[i] = ''
2011-12-14 06:23:00 +04:00
newargs = [ arg for arg in newargs if arg is not '' ]
2011-12-14 04:21:03 +04:00
2012-02-23 23:14:52 +04:00
# Find library files
for lib in libs:
if DEBUG: print >> sys.stderr, 'emcc: looking for library "%s"' % lib
found = False
for prefix in LIB_PREFIXES:
2012-02-25 08:31:11 +04:00
for suff in STATICLIB_SUFFIXES + DYNAMICLIB_SUFFIXES:
name = prefix + lib + suff
2012-02-23 23:14:52 +04:00
for lib_dir in lib_dirs:
path = os.path.join(lib_dir, name)
if os.path.exists(path):
if DEBUG: print >> sys.stderr, 'emcc: found library "%s" at %s' % (lib, path)
input_files.append(path)
found = True
break
if found: break
if found: break
2012-02-25 08:31:11 +04:00
if ignore_dynamic_linking:
input_files = filter(lambda input_file: not input_file.endswith(DYNAMICLIB_SUFFIXES), input_files)
2012-03-12 00:19:02 +04:00
if len(input_files) == 0:
print >> sys.stderr, 'emcc: no input files'
print >> sys.stderr, 'note that input files without a known suffix are ignored, make sure your input files end with one of: ' + str(SOURCE_SUFFIXES + BITCODE_SUFFIXES + DYNAMICLIB_SUFFIXES + STATICLIB_SUFFIXES + ASSEMBLY_SUFFIXES)
exit(0)
2011-12-14 04:21:03 +04:00
2011-12-13 06:07:07 +04:00
newargs += CC_ADDITIONAL_ARGS
2011-11-21 09:02:46 +04:00
2011-12-14 04:21:03 +04:00
specified_target = target
2011-12-14 22:50:22 +04:00
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
2011-12-12 03:24:04 +04:00
2011-12-14 04:21:03 +04:00
target_basename = unsuffixed_basename(target)
2011-12-12 08:43:08 +04:00
2011-12-15 06:46:48 +04:00
# -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, 'Must have source code inputs to use -c'
2011-12-15 05:01:16 +04:00
target = target_basename + '.o'
2011-12-12 08:43:08 +04:00
2012-01-05 06:14:18 +04:00
if '.' in target:
final_suffix = target.split('.')[-1]
else:
final_suffix = ''
2011-12-12 03:24:04 +04:00
2011-12-14 00:20:45 +04:00
# Apply optimization level settings
2011-12-21 04:38:14 +04:00
shared.Settings.apply_opt_level(opt_level, noisy=True)
2011-12-14 00:20:45 +04:00
2011-12-17 00:36:12 +04:00
# Apply -s settings in newargs here (after optimization levels, so they can override them)
for change in settings_changes:
key, value = change.split('=')
exec('shared.Settings.' + key + ' = ' + value)
2011-12-14 06:23:00 +04:00
## Compile source code to bitcode
2011-12-13 01:35:51 +04:00
2011-12-22 03:47:38 +04:00
if DEBUG: print >> sys.stderr, 'emcc: compiling to bitcode'
2011-12-15 06:12:22 +04:00
2012-02-08 04:54:24 +04:00
temp_files = []
2011-12-14 04:21:03 +04:00
# First, generate LLVM bitcode. For each input file, we get base.o with bitcode
2011-12-14 06:23:00 +04:00
for input_file in input_files:
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if input_file.endswith(SOURCE_SUFFIXES):
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if DEBUG: print >> sys.stderr, 'emcc: compiling source file: ', input_file
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output_file = in_temp(unsuffixed_basename(input_file) + '.o')
2012-02-08 04:54:24 +04:00
temp_files.append(output_file)
2011-12-20 04:01:01 +04:00
args = newargs + ['-emit-llvm', '-c', input_file, '-o', output_file]
2011-12-15 05:42:35 +04:00
if DEBUG: print >> sys.stderr, "emcc running:", call, ' '.join(args)
2012-03-01 18:32:24 +04:00
execute([call] + args) # let compiler frontend print directly, so colors are saved (PIPE kills that)
2011-12-20 04:01:01 +04:00
if not os.path.exists(output_file):
print >> sys.stderr, 'emcc: compiler frontend failed to generate LLVM bitcode, halting'
sys.exit(1)
2011-12-17 06:14:02 +04:00
else: # bitcode
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if input_file.endswith(BITCODE_SUFFIXES):
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if DEBUG: print >> sys.stderr, 'emcc: copying bitcode file: ', input_file
2012-02-08 04:54:24 +04:00
temp_file = in_temp(unsuffixed_basename(input_file) + '.o')
shutil.copyfile(input_file, temp_file)
temp_files.append(temp_file)
2012-02-25 08:31:11 +04:00
elif input_file.endswith(DYNAMICLIB_SUFFIXES) or shared.Building.is_ar(input_file):
2012-02-08 05:05:01 +04:00
if DEBUG: print >> sys.stderr, 'emcc: copying library file: ', input_file
2012-02-08 04:54:24 +04:00
temp_file = in_temp(os.path.basename(input_file))
shutil.copyfile(input_file, temp_file)
temp_files.append(temp_file)
2011-12-17 06:14:02 +04:00
else: #.ll
2011-12-22 03:47:38 +04:00
if not LEAVE_INPUTS_RAW:
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# Note that by assembling the .ll file, then disassembling it later, we will
# remove annotations which is a good thing for compilation time
2011-12-22 04:48:37 +04:00
if DEBUG: print >> sys.stderr, 'emcc: assembling assembly file: ', input_file
2012-02-09 22:37:33 +04:00
temp_file = in_temp(unsuffixed_basename(input_file) + '.o')
shared.Building.llvm_as(input_file, temp_file)
2012-02-08 04:54:24 +04:00
temp_files.append(temp_file)
2011-12-12 03:24:04 +04:00
2012-02-16 01:39:56 +04:00
if not LEAVE_INPUTS_RAW: assert len(temp_files) == len(input_files)
2011-12-12 03:24:04 +04:00
# If we were just asked to generate bitcode, stop there
2011-12-15 06:12:22 +04:00
if final_suffix not in ['js', 'html']:
2012-01-24 01:44:36 +04:00
if llvm_opts > 0:
2012-01-08 06:36:42 +04:00
print >> sys.stderr, 'emcc: warning: -Ox flags ignored, since not generating JavaScript'
2011-12-15 05:42:35 +04:00
if not specified_target:
2011-12-14 04:21:03 +04:00
for input_file in input_files:
2011-12-15 05:42:35 +04:00
shutil.move(in_temp(unsuffixed_basename(input_file) + '.o'), unsuffixed_basename(input_file) + '.' + final_suffix)
else:
2011-12-15 06:46:48 +04:00
if len(input_files) == 1:
shutil.move(in_temp(unsuffixed_basename(input_files[0]) + '.o'), specified_target)
else:
2011-12-17 00:36:12 +04:00
assert not has_dash_c, 'fatal error: cannot specify -o with -c with multiple files' + str(sys.argv)
2011-12-15 06:46:48 +04:00
# We have a specified target (-o <target>), which is not JavaScript or HTML, and
2011-12-17 07:08:30 +04:00
# we have multiple files: Link them TODO: llvm link-time opts?
2012-02-08 04:54:24 +04:00
ld_args = temp_files + ['-b', specified_target]
2011-12-17 07:08:30 +04:00
#[arg.split('-Wl,')[1] for arg in filter(lambda arg: arg.startswith('-Wl,'), sys.argv)]
if DEBUG: print >> sys.stderr, 'emcc: link: ' + str(ld_args)
2012-03-01 18:32:24 +04:00
execute([shared.LLVM_LD, '-disable-opt'] + ld_args)
2011-12-12 03:24:04 +04:00
exit(0)
2011-12-13 01:35:51 +04:00
## Continue on to create JavaScript
2012-01-08 06:36:42 +04:00
if DEBUG: print >> sys.stderr, 'emcc: will generate JavaScript'
2011-12-15 06:12:22 +04:00
2011-12-17 00:36:12 +04:00
extra_files_to_link = []
2012-01-26 06:06:39 +04:00
if not LEAVE_INPUTS_RAW and not AUTODEBUG:
2012-01-18 06:41:30 +04:00
# Check if we need to include some libraries that we compile. (We implement libc ourselves in js, but
# compile a malloc implementation and stdlibc++.)
# Note that we assume a single symbol is enough to know if we have/do not have dlmalloc etc. If you
2011-12-22 03:47:38 +04:00
# include just a few symbols but want the rest, this will not work.
2012-01-18 07:05:12 +04:00
# dlmalloc
2012-01-18 06:41:30 +04:00
def create_dlmalloc():
2012-01-19 09:02:12 +04:00
if DEBUG: print >> sys.stderr, 'emcc: building dlmalloc for cache'
2012-03-01 18:32:24 +04:00
execute([shared.EMCC, shared.path_from_root('system', 'lib', 'dlmalloc.c'), '-g', '-o', in_temp('dlmalloc.o')], stdout=stdout, stderr=stderr)
2012-01-19 09:02:12 +04:00
# we include the libc++ new stuff here, so that the common case of using just new/delete is quick to link
2012-03-01 18:32:24 +04:00
execute([shared.EMXX, shared.path_from_root('system', 'lib', 'libcxx', 'new.cpp'), '-g', '-o', in_temp('new.o')], stdout=stdout, stderr=stderr)
2012-01-19 09:02:12 +04:00
shared.Building.link([in_temp('dlmalloc.o'), in_temp('new.o')], in_temp('dlmalloc_full.o'))
return in_temp('dlmalloc_full.o')
2012-01-18 06:41:30 +04:00
def fix_dlmalloc():
2011-12-22 03:47:38 +04:00
# dlmalloc needs some sign correction. # If we are in mode 0, switch to 2. We will add our lines
try:
if shared.Settings.CORRECT_SIGNS == 0: raise Exception('we need to change to 2')
except: # we fail if equal to 0 - so we need to switch to 2 - or if CORRECT_SIGNS is not even in Settings
shared.Settings.CORRECT_SIGNS = 2
if shared.Settings.CORRECT_SIGNS == 2:
shared.Settings.CORRECT_SIGNS_LINES = [shared.path_from_root('src', 'dlmalloc.c') + ':' + str(i+4) for i in [4816, 4191, 4246, 4199, 4205, 4235, 4227]]
# If we are in mode 1, we are correcting everything anyhow. If we are in mode 3, we will be corrected
# so all is well anyhow too.
2012-01-19 23:26:56 +04:00
# XXX We also need to add libc symbols that use malloc, for example strdup. It's very rare to use just them and not
# a normal malloc symbol (like free, after calling strdup), so we haven't hit this yet, but it is possible.
2012-01-19 09:02:12 +04:00
dlmalloc_symbols = open(shared.path_from_root('system', 'lib', 'dlmalloc.symbols')).read().split('\n')
2012-01-18 06:41:30 +04:00
2012-01-18 07:05:12 +04:00
# libcxx
def create_libcxx():
2012-01-19 09:02:12 +04:00
if DEBUG: print >> sys.stderr, 'emcc: building libcxx for cache'
2012-01-18 23:35:00 +04:00
shared.Building.build_library('libcxx', shared.EMSCRIPTEN_TEMP_DIR, shared.EMSCRIPTEN_TEMP_DIR, ['libcxx.bc'], configure=None, copy_project=True, source_dir=shared.path_from_root('system', 'lib', 'libcxx'))
return os.path.join(shared.EMSCRIPTEN_TEMP_DIR, 'libcxx', 'libcxx.bc')
2012-01-18 07:05:12 +04:00
def fix_libcxx():
2012-01-22 02:01:42 +04:00
assert shared.Settings.QUANTUM_SIZE == 4, 'We do not support libc++ with QUANTUM_SIZE == 1'
2012-01-21 05:56:59 +04:00
# libcxx might need corrections, so turn them all on. TODO: check which are actually needed
shared.Settings.CORRECT_SIGNS = shared.Settings.CORRECT_OVERFLOWS = shared.Settings.CORRECT_ROUNDINGS = 1
print >> sys.stderr, 'emcc: warning: using libcxx turns on CORRECT_* options'
2012-01-18 22:40:29 +04:00
libcxx_symbols = map(lambda line: line.strip().split(' ')[1], open(shared.path_from_root('system', 'lib', 'libcxx', 'symbols')).readlines())
libcxx_symbols = filter(lambda symbol: symbol not in dlmalloc_symbols, libcxx_symbols)
libcxx_symbols = set(libcxx_symbols)
2012-01-18 07:05:12 +04:00
2012-02-23 00:29:38 +04:00
# libcxxabi - just for dynamic_cast for now
def create_libcxxabi():
if DEBUG: print >> sys.stderr, 'emcc: building libcxxabi for cache'
shared.Building.build_library('libcxxabi', shared.EMSCRIPTEN_TEMP_DIR, shared.EMSCRIPTEN_TEMP_DIR, ['libcxxabi.bc'], configure=None, copy_project=True, source_dir=shared.path_from_root('system', 'lib', 'libcxxabi'))
return os.path.join(shared.EMSCRIPTEN_TEMP_DIR, 'libcxxabi', 'libcxxabi.bc')
def fix_libcxxabi():
assert shared.Settings.QUANTUM_SIZE == 4, 'We do not support libc++abi with QUANTUM_SIZE == 1'
print >> sys.stderr, 'emcc: warning: using libcxxabi, this may need CORRECT_* options'
#shared.Settings.CORRECT_SIGNS = shared.Settings.CORRECT_OVERFLOWS = shared.Settings.CORRECT_ROUNDINGS = 1
libcxxabi_symbols = map(lambda line: line.strip().split(' ')[1], open(shared.path_from_root('system', 'lib', 'libcxxabi', 'symbols')).readlines())
libcxxabi_symbols = filter(lambda symbol: symbol not in dlmalloc_symbols, libcxxabi_symbols)
libcxxabi_symbols = set(libcxxabi_symbols)
2012-01-19 09:24:11 +04:00
force = False # If we have libcxx, we must force inclusion of dlmalloc, since libcxx uses new internally. Note: this is kind of hacky
2012-02-23 00:29:38 +04:00
for name, create, fix, library_symbols in [('libcxx', create_libcxx, fix_libcxx, libcxx_symbols),
('libcxxabi', create_libcxxabi, fix_libcxxabi, libcxxabi_symbols),
('dlmalloc', create_dlmalloc, fix_dlmalloc, dlmalloc_symbols)]:
2012-01-22 02:12:18 +04:00
need = []
has = []
2012-02-16 01:39:56 +04:00
for temp_file in temp_files:
symbols = shared.Building.llvm_nm(temp_file)
2012-01-18 21:53:48 +04:00
for library_symbol in library_symbols:
if library_symbol in symbols.undefs:
2012-01-22 02:12:18 +04:00
need.append(library_symbol)
2012-01-18 21:53:48 +04:00
if library_symbol in symbols.defs:
2012-01-22 02:12:18 +04:00
has.append(library_symbol)
if DEBUG: print >> sys.stderr, 'emcc: considering including %s: we need |%s| and have |%s|' % (name, str(need), str(has))
2012-01-19 09:24:11 +04:00
if force or (need and not has):
2012-01-18 06:41:30 +04:00
# We need to build and link the library in
if DEBUG: print >> sys.stderr, 'emcc: including %s' % name
extra_files_to_link.append(shared.Cache.get(name, create))
2012-01-19 09:24:11 +04:00
force = True
2012-01-18 06:53:57 +04:00
if fix:
fix()
2011-12-17 00:36:12 +04:00
2012-02-16 03:14:46 +04:00
# 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 \
2012-02-25 08:31:11 +04:00
(not LEAVE_INPUTS_RAW and not (suffix(temp_files[0]) in BITCODE_SUFFIXES or suffix(temp_files[0]) in DYNAMICLIB_SUFFIXES) and shared.Building.is_ar(temp_files[0])):
2012-02-16 03:14:46 +04:00
linker_inputs = temp_files + extra_files_to_link
2011-12-22 04:48:37 +04:00
if DEBUG: print >> sys.stderr, 'emcc: linking: ', linker_inputs
shared.Building.link(linker_inputs,
2011-12-17 00:36:12 +04:00
in_temp(target_basename + '.bc'))
2012-01-30 08:50:29 +04:00
final = in_temp(target_basename + '.bc')
2011-12-14 04:21:03 +04:00
else:
2011-12-22 03:47:38 +04:00
if not LEAVE_INPUTS_RAW:
2012-02-16 01:39:56 +04:00
shutil.move(temp_files[0], in_temp(target_basename + '.bc'))
2012-01-30 08:50:29 +04:00
final = in_temp(target_basename + '.bc')
else:
final = input_files[0]
if DEBUG:
print >> sys.stderr, 'emcc: 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')
2011-12-14 04:21:03 +04:00
2012-01-08 06:36:42 +04:00
# Optimize, if asked to
2012-02-01 07:09:32 +04:00
if llvm_opts > 0 and not LEAVE_INPUTS_RAW:
if DEBUG: print >> sys.stderr, 'emcc: LLVM -O%d' % llvm_opts
shared.Building.llvm_opt(in_temp(target_basename + '.bc'), llvm_opts)
2012-01-30 09:05:12 +04:00
if DEBUG: save_intermediate('opt', 'bc')
# Do LTO in a separate pass to work around LLVM bug XXX (see failure e.g. in cubescript)
2012-02-01 22:37:40 +04:00
if shared.Building.can_use_unsafe_opts() and shared.Building.can_build_standalone():
2012-02-02 06:37:13 +04:00
lto_opts = []
if not shared.Building.can_inline(): lto_opts.append('-disable-inlining')
lto_opts.append('-std-link-opts')
if DEBUG: print >> sys.stderr, 'emcc: LLVM LTO:', lto_opts
shared.Building.llvm_opt(in_temp(target_basename + '.bc'), lto_opts)
2012-01-30 22:41:55 +04:00
if DEBUG: save_intermediate('lto', 'bc')
2012-01-19 00:31:45 +04:00
else:
# If possible, remove dead functions etc., this potentially saves a lot in the size of the generated code (and the time to compile it)
2012-02-01 22:37:40 +04:00
if not LEAVE_INPUTS_RAW and shared.Building.can_build_standalone():
2012-01-19 00:31:45 +04:00
if DEBUG: print >> sys.stderr, 'emcc: LLVM dead globals elimination'
shared.Building.llvm_opt(in_temp(target_basename + '.bc'), ['-internalize', '-globaldce'])
2012-01-30 09:05:12 +04:00
if DEBUG: save_intermediate('dce', 'bc')
2012-01-30 08:50:29 +04:00
2012-01-25 21:55:58 +04:00
# Prepare .ll for Emscripten
2011-12-22 03:47:38 +04:00
if not LEAVE_INPUTS_RAW:
2012-01-02 08:55:55 +04:00
final = shared.Building.llvm_dis(final, final + '.ll')
2011-12-22 03:47:38 +04:00
else:
assert len(input_files) == 1
2012-01-22 05:16:50 +04:00
if DEBUG: save_intermediate('ll', 'll')
2012-01-01 23:17:49 +04:00
2012-01-26 06:06:39 +04:00
if AUTODEBUG:
2012-02-04 03:00:45 +04:00
if DEBUG: print >> sys.stderr, 'emcc: autodebug'
2012-03-05 16:59:53 +04:00
execute(['python', shared.AUTODEBUGGER, final, final + '.ad.ll'])
2012-01-25 21:55:58 +04:00
final += '.ad.ll'
if DEBUG: save_intermediate('autodebug', 'll')
# Emscripten
2012-01-22 05:16:50 +04:00
if DEBUG: print >> sys.stderr, 'emcc: LLVM => JS'
2012-01-01 23:17:49 +04:00
final = shared.Building.emscripten(final, append_ext=False)
2012-01-02 08:55:55 +04:00
if DEBUG: save_intermediate('original')
2011-12-12 03:24:04 +04:00
2012-03-16 01:07:04 +04:00
# Embed and preload files
if len(embed_files) + len(preload_files) > 0:
if DEBUG: print >> sys.stderr, 'emcc: setting up files'
code = ''
2012-03-16 01:53:48 +04:00
partial_dirs = []
for filename in embed_files + preload_files:
dirname = os.path.dirname(filename)
parts = dirname.split(os.path.sep)
if dirname != '' and dirname != os.path.sep:
for i in range(len(parts)):
partial = os.path.sep.join(parts[:i])
if partial not in partial_dirs:
code += '''FS.createFolder('/%s', '%s', true, false);\n''' % (os.path.sep.join(parts[:i-1]), parts[-1])
partial_dirs.append(partial)
2012-03-16 01:07:04 +04:00
for filename in embed_files:
2012-03-16 05:15:12 +04:00
if filename.endswith(IMAGE_SUFFIXES):
print >> sys.stderr, 'emcc: warning: embedding file %s, but not making sure it decodes synchronously. consider using --preload-file' % filename
2012-03-16 01:07:04 +04:00
code += '''FS.createDataFile('/', '%s', %s, true, true);\n''' % (os.path.basename(filename), str(map(ord, open(filename, 'rb').read())))
2012-03-16 05:15:12 +04:00
2012-03-16 01:07:04 +04:00
counter = 0
for filename in preload_files:
2012-03-16 01:53:48 +04:00
varname = 'filePreload%d' % counter
2012-03-16 01:07:04 +04:00
counter += 1
2012-03-16 05:15:12 +04:00
image = filename.endswith(IMAGE_SUFFIXES)
if not image:
code += '''
var %(varname)s = new XMLHttpRequest();
%(varname)s.open('GET', '%(filename)s', true);
%(varname)s.responseType = 'arraybuffer';
%(varname)s.onload = function() {
var arrayBuffer = %(varname)s.response; // Note: not X.responseText
assert(arrayBuffer, 'Loading file %(filename)s failed.');
var byteArray = new Uint8Array(arrayBuffer);
FS.createDataFile('/%(dirname)s', '%(basename)s', byteArray, true, true);
removeRunDependency();
};
addRunDependency();
%(varname)s.send(null);
''' % { 'varname': varname, 'filename': filename, 'dirname': os.path.dirname(filename), 'basename': os.path.basename(filename) }
else:
print >> sys.stderr, 'emcc: warning: preloading file %s as image because of suffix. it will not be available to load as a normal file' % filename
code += '''
var %(varname)s = new Image();
%(varname)s.src = '%(filename)s';
%(varname)s.onload = function() {
assert(%(varname)s.complete, 'Image could not be decoded');
var canvas = document.createElement('canvas');
canvas.width = %(varname)s.width;
canvas.height = %(varname)s.height;
var ctx = canvas.getContext('2d');
ctx.drawImage(%(varname)s, 0, 0);
preloadedImages['%(filename)s'] = ctx.getImageData(0, 0, canvas.width, canvas.height);
removeRunDependency();
};
addRunDependency();
''' % { 'varname': varname, 'filename': filename }
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src = open(final).read().replace('// {{PRE_RUN_ADDITIONS}}', code)
final += '.files.js'
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open(final, 'w').write(src)
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if DEBUG: save_intermediate('files')
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# Apply pre and postjs files
if pre_js or post_js:
if DEBUG: print >> sys.stderr, 'emcc: applying pre/postjses'
src = open(final).read()
final += '.pp.js'
open(final, 'w').write((pre_js or '') + src + (post_js or ''))
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if DEBUG: save_intermediate('pre-post')
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# Apply a source code transformation, if requested
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if js_transform:
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shutil.copyfile(final, final + '.tr.js')
final += '.tr.js'
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if DEBUG: print >> sys.stderr, 'emcc: applying transform: %s' % js_transform
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execute(js_transform.split(' ') + [os.path.abspath(final)])
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if DEBUG: save_intermediate('transformed')
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# It is useful to run several js optimizer passes together, to save on unneeded unparsing/reparsing
js_optimizer_queue = []
def flush_js_optimizer_queue():
global final, js_optimizer_queue
if len(js_optimizer_queue) > 0:
if not DEBUG:
final = shared.Building.js_optimizer(final, js_optimizer_queue)
else:
for name in js_optimizer_queue:
print >> sys.stderr, 'emcc: applying js optimization pass:', name
final = shared.Building.js_optimizer(final, [name])
save_intermediate(name)
js_optimizer_queue = []
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if opt_level >= 1:
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if DEBUG: print >> sys.stderr, 'emcc: running pre-closure post-opts'
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if DEBUG:
# Clean up the syntax a bit
final = shared.Building.js_optimizer(final, [])
if DEBUG: save_intermediate('pretty')
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if shared.Settings.RELOOP:
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js_optimizer_queue += ['hoistMultiples', 'loopOptimizer']
flush_js_optimizer_queue()
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# eliminator
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if DEBUG: print >> sys.stderr, 'emcc: running variable eliminator'
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final = shared.Building.eliminator(final)
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if DEBUG: save_intermediate('eliminator')
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# js optimizer pre-pass
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js_optimizer_queue += ['simplifyExpressionsPre']
if shared.Settings.RELOOP:
js_optimizer_queue += ['optimizeShiftsAggressive'] # aggressive shifts optimization requires loops, it breaks on switches
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flush_js_optimizer_queue()
final = shared.Building.eliminator(final) # aggressive shifts optimization introduces some new variables, remove ones that we can
if DEBUG: save_intermediate('eliminator')
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if closure:
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flush_js_optimizer_queue()
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if DEBUG: print >> sys.stderr, 'emcc: running closure'
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final = shared.Building.closure_compiler(final)
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if DEBUG: save_intermediate('closure')
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if opt_level >= 1:
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# js optimizer post-pass
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if DEBUG: print >> sys.stderr, 'emcc: running post-closure post-opts'
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js_optimizer_queue += ['simplifyExpressionsPost']
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if compress_whitespace:
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js_optimizer_queue += ['compress']
flush_js_optimizer_queue()
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# If we were asked to also generate HTML, do that
if final_suffix == 'html':
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if DEBUG: print >> sys.stderr, 'emcc: generating HTML'
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shell = open(shell_path).read()
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html = open(target, 'w')
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html.write(shell.replace('{{{ SCRIPT_CODE }}}', open(final).read()))
html.close()
else:
# copy final JS to output
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shutil.move(final, target)
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finally:
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if not TEMP_DIR:
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try:
shutil.rmtree(temp_dir)
except:
pass
else:
print >> sys.stderr, 'emcc saved files are in:', temp_dir
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