#!/usr/bin/env python2 ''' You should normally never use this! Use emcc instead. This is a small wrapper script around the core JS compiler. This calls that compiler with the settings given to it. It can also read data from C/C++ header files (so that the JS compiler can see the constants in those headers, for the libc implementation in JS). ''' import os, sys, json, optparse, subprocess, re, time, multiprocessing, functools from tools import shared, jsrun, cache as cache_module __rootpath__ = os.path.abspath(os.path.dirname(__file__)) def path_from_root(*pathelems): """Returns the absolute path for which the given path elements are relative to the emscripten root. """ return os.path.join(__rootpath__, *pathelems) configuration = shared.Configuration(environ=os.environ) temp_files = configuration.get_temp_files() def scan(ll, settings): # blockaddress(@main, %23) blockaddrs = [] for blockaddr in re.findall('blockaddress\([^)]*\)', ll): b = blockaddr.split('(')[1][:-1].split(', ') blockaddrs.append(b) if len(blockaddrs) > 0: settings['NECESSARY_BLOCKADDRS'] = blockaddrs NUM_CHUNKS_PER_CORE = 1.25 MIN_CHUNK_SIZE = 1024*1024 MAX_CHUNK_SIZE = float(os.environ.get('EMSCRIPT_MAX_CHUNK_SIZE') or 'inf') # configuring this is just for debugging purposes def process_funcs((i, funcs, meta, settings_file, compiler, forwarded_file, libraries, compiler_engine)): ll = ''.join(funcs) + '\n' + meta funcs_file = temp_files.get('.func_%d.ll' % i).name open(funcs_file, 'w').write(ll) out = jsrun.run_js( compiler, engine=compiler_engine, args=[settings_file, funcs_file, 'funcs', forwarded_file] + libraries, stdout=subprocess.PIPE, cwd=path_from_root('src')) shared.try_delete(funcs_file) return out def emscript(configuration, infile, settings, outfile, libraries=[], compiler_engine=None, jcache=None): """Runs the emscripten LLVM-to-JS compiler. We parallelize as much as possible Args: infile: The path to the input LLVM assembly file. settings: JSON-formatted settings that override the values defined in src/settings.js. outfile: The file where the output is written. """ DEBUG = configuration.DEBUG DEBUG_CACHE = configuration.DEBUG_CACHE compiler = path_from_root('src', 'compiler.js') # Parallelization: We run 3 phases: # 1 aka 'pre' : Process types and metadata and so forth, and generate the preamble. # 2 aka 'funcs': Process functions. We can parallelize this, working on each function independently. # 3 aka 'post' : Process globals, generate postamble and finishing touches. configuration.debug_log('emscript: ll=>js') if jcache: jcache.ensure() # Pre-scan ll and alter settings as necessary if DEBUG: t = time.time() ll = open(infile).read() scan(ll, settings) total_ll_size = len(ll) ll = None # allow collection if DEBUG: print >> sys.stderr, ' emscript: scan took %s seconds' % (time.time() - t) # Split input into the relevant parts for each phase pre = [] funcs = [] # split up functions here, for parallelism later func_idents = [] meta = [] # needed by each function XXX if DEBUG: t = time.time() in_func = False ll_lines = open(infile).readlines() for line in ll_lines: if in_func: funcs[-1][1].append(line) if line.startswith('}'): in_func = False funcs[-1] = (funcs[-1][0], ''.join(funcs[-1][1])) pre.append(line) # pre needs it to, so we know about all implemented functions else: if line.startswith(';'): continue if line.startswith('define '): in_func = True funcs.append((line, [line])) # use the entire line as the identifier pre.append(line) # pre needs it to, so we know about all implemented functions elif line.find(' = type { ') > 0: pre.append(line) # type elif line.startswith('!'): if line.startswith('!llvm.module'): continue # we can ignore that meta.append(line) # metadata else: pre.append(line) # pre needs it so we know about globals in pre and funcs. So emit globals there ll_lines = None meta = ''.join(meta) if DEBUG and len(meta) > 1024*1024: print >> sys.stderr, 'emscript warning: large amounts of metadata, will slow things down' if DEBUG: print >> sys.stderr, ' emscript: split took %s seconds' % (time.time() - t) #if DEBUG: # print >> sys.stderr, '========= pre ================\n' # print >> sys.stderr, ''.join(pre) # print >> sys.stderr, '========== funcs ===============\n' # for func in funcs: # print >> sys.stderr, '\n// ===\n\n', ''.join(func) # print >> sys.stderr, '=========================\n' # Save settings to a file to work around v8 issue 1579 settings_file = temp_files.get('.txt').name def save_settings(): global settings_text settings_text = json.dumps(settings, sort_keys=True) s = open(settings_file, 'w') s.write(settings_text) s.close() save_settings() # Phase 1 - pre if DEBUG: t = time.time() pre_file = temp_files.get('.pre.ll').name pre_input = ''.join(pre) + '\n' + meta out = None if jcache: keys = [pre_input, settings_text, ','.join(libraries)] shortkey = jcache.get_shortkey(keys) if DEBUG_CACHE: print >>sys.stderr, 'shortkey', shortkey out = jcache.get(shortkey, keys) if DEBUG_CACHE and not out: dfpath = os.path.join(configuration.TEMP_DIR, "ems_" + shortkey) dfp = open(dfpath, 'w') dfp.write(pre_input); dfp.write("\n\n========================== settings_text\n\n"); dfp.write(settings_text); dfp.write("\n\n========================== libraries\n\n"); dfp.write("\n".join(libraries)) dfp.close() print >>sys.stderr, ' cache miss, key data dumped to %s' % dfpath if out and DEBUG: print >> sys.stderr, ' loading pre from jcache' if not out: open(pre_file, 'w').write(pre_input) out = jsrun.run_js(compiler, compiler_engine, [settings_file, pre_file, 'pre'] + libraries, stdout=subprocess.PIPE, cwd=path_from_root('src')) if jcache: if DEBUG: print >> sys.stderr, ' saving pre to jcache' jcache.set(shortkey, keys, out) pre, forwarded_data = out.split('//FORWARDED_DATA:') forwarded_file = temp_files.get('.json').name open(forwarded_file, 'w').write(forwarded_data) if DEBUG: print >> sys.stderr, ' emscript: phase 1 took %s seconds' % (time.time() - t) # Phase 2 - func cores = int(os.environ.get('EMCC_CORES') or multiprocessing.cpu_count()) assert cores >= 1 if cores > 1: intended_num_chunks = int(round(cores * NUM_CHUNKS_PER_CORE)) chunk_size = max(MIN_CHUNK_SIZE, total_ll_size / intended_num_chunks) chunk_size += 3*len(meta) + len(forwarded_data)/3 # keep ratio of lots of function code to meta (expensive to process, and done in each parallel task) and forwarded data (less expensive but potentially significant) chunk_size = min(MAX_CHUNK_SIZE, chunk_size) else: chunk_size = MAX_CHUNK_SIZE # if 1 core, just use the max chunk size if DEBUG: t = time.time() forwarded_json = json.loads(forwarded_data) indexed_functions = set() if settings.get('ASM_JS'): settings['EXPORTED_FUNCTIONS'] = forwarded_json['EXPORTED_FUNCTIONS'] save_settings() chunks = cache_module.chunkify( funcs, chunk_size, jcache.get_cachename('emscript_files') if jcache else None) if jcache: # load chunks from cache where we can # TODO: ignore small chunks cached_outputs = [] def load_from_cache(chunk): keys = [settings_text, forwarded_data, chunk] shortkey = jcache.get_shortkey(keys) # TODO: share shortkeys with later code out = jcache.get(shortkey, keys) # this is relatively expensive (pickling?) if out: cached_outputs.append(out) return False return True chunks = filter(load_from_cache, chunks) if len(cached_outputs) > 0: if out and DEBUG: print >> sys.stderr, ' loading %d funcchunks from jcache' % len(cached_outputs) else: cached_outputs = [] # TODO: minimize size of forwarded data from funcs to what we actually need if cores == 1 and total_ll_size < MAX_CHUNK_SIZE: assert len(chunks) == 1, 'no point in splitting up without multiple cores' if len(chunks) > 0: if DEBUG: print >> sys.stderr, ' emscript: phase 2 working on %d chunks %s (intended chunk size: %.2f MB, meta: %.2f MB, forwarded: %.2f MB, total: %.2f MB)' % (len(chunks), ('using %d cores' % cores) if len(chunks) > 1 else '', chunk_size/(1024*1024.), len(meta)/(1024*1024.), len(forwarded_data)/(1024*1024.), total_ll_size/(1024*1024.)) commands = [ (i, chunk, meta, settings_file, compiler, forwarded_file, libraries, compiler_engine) for i, chunk in enumerate(chunks) ] if len(chunks) > 1: pool = multiprocessing.Pool(processes=cores) outputs = pool.map( process_funcs, commands, chunksize=1) elif len(chunks) == 1: outputs = [process_funcs(commands[0])] else: outputs = [] if jcache: # save chunks to cache for i in range(len(chunks)): chunk = chunks[i] keys = [settings_text, forwarded_data, chunk] shortkey = jcache.get_shortkey(keys) jcache.set(shortkey, keys, outputs[i]) if out and DEBUG and len(chunks) > 0: print >> sys.stderr, ' saving %d funcchunks to jcache' % len(chunks) if jcache: outputs += cached_outputs # TODO: preserve order outputs = [output.split('//FORWARDED_DATA:') for output in outputs] for output in outputs: assert len(output) == 2, 'Did not receive forwarded data in an output - process failed? We only got: ' + output[0] if DEBUG: print >> sys.stderr, ' emscript: phase 2 took %s seconds' % (time.time() - t) if DEBUG: t = time.time() # merge forwarded data if settings.get('ASM_JS'): all_exported_functions = set(settings['EXPORTED_FUNCTIONS']) # both asm.js and otherwise for additional_export in settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE']: # additional functions to export from asm, if they are implemented all_exported_functions.add('_' + additional_export) exported_implemented_functions = set() for func_js, curr_forwarded_data in outputs: curr_forwarded_json = json.loads(curr_forwarded_data) forwarded_json['Types']['preciseI64MathUsed'] = forwarded_json['Types']['preciseI64MathUsed'] or curr_forwarded_json['Types']['preciseI64MathUsed'] for key, value in curr_forwarded_json['Functions']['blockAddresses'].iteritems(): forwarded_json['Functions']['blockAddresses'][key] = value for key in curr_forwarded_json['Functions']['indexedFunctions'].iterkeys(): indexed_functions.add(key) if settings.get('ASM_JS'): for key in curr_forwarded_json['Functions']['implementedFunctions'].iterkeys(): if key in all_exported_functions: exported_implemented_functions.add(key) for key, value in curr_forwarded_json['Functions']['unimplementedFunctions'].iteritems(): forwarded_json['Functions']['unimplementedFunctions'][key] = value if settings.get('ASM_JS'): parts = pre.split('// ASM_LIBRARY FUNCTIONS\n') if len(parts) > 1: pre = parts[0] outputs.append([parts[1]]) funcs_js = ''.join([output[0] for output in outputs]) outputs = None if DEBUG: print >> sys.stderr, ' emscript: phase 2b took %s seconds' % (time.time() - t) if DEBUG: t = time.time() # calculations on merged forwarded data forwarded_json['Functions']['indexedFunctions'] = {} i = 2 for indexed in indexed_functions: #print >> sys.stderr, 'indaxx', indexed, i forwarded_json['Functions']['indexedFunctions'][indexed] = i # make sure not to modify this python object later - we use it in indexize i += 2 forwarded_json['Functions']['nextIndex'] = i indexing = forwarded_json['Functions']['indexedFunctions'] def indexize(js): return re.sub(r"'{{ FI_([\w\d_$]+) }}'", lambda m: str(indexing.get(m.groups(0)[0]) or 0), js) blockaddrs = forwarded_json['Functions']['blockAddresses'] def blockaddrsize(js): return re.sub(r'{{{ BA_([\w\d_$]+)\|([\w\d_$]+) }}}', lambda m: str(blockaddrs[m.groups(0)[0]][m.groups(0)[1]]), js) #if DEBUG: outfile.write('// pre\n') outfile.write(blockaddrsize(indexize(pre))) pre = None #if DEBUG: outfile.write('// funcs\n') # forward forwarded_data = json.dumps(forwarded_json) forwarded_file = temp_files.get('.2.json').name open(forwarded_file, 'w').write(indexize(forwarded_data)) if DEBUG: print >> sys.stderr, ' emscript: phase 2c took %s seconds' % (time.time() - t) # Phase 3 - post if DEBUG: t = time.time() post_file = temp_files.get('.post.ll').name open(post_file, 'w').write('\n') # no input, just processing of forwarded data out = jsrun.run_js(compiler, compiler_engine, [settings_file, post_file, 'post', forwarded_file] + libraries, stdout=subprocess.PIPE, cwd=path_from_root('src')) post, last_forwarded_data = out.split('//FORWARDED_DATA:') # if this fails, perhaps the process failed prior to printing forwarded data? last_forwarded_json = json.loads(last_forwarded_data) if settings.get('ASM_JS'): simple = os.environ.get('EMCC_SIMPLE_ASM') class Counter: i = 0 pre_tables = last_forwarded_json['Functions']['tables']['pre'] del last_forwarded_json['Functions']['tables']['pre'] # Find function table calls without function tables generated for them for use in set(re.findall(r'{{{ FTM_[\w\d_$]+ }}}', funcs_js)): sig = use[8:len(use)-4] if sig not in last_forwarded_json['Functions']['tables']: if DEBUG: print >> sys.stderr, 'add empty function table', sig last_forwarded_json['Functions']['tables'][sig] = 'var FUNCTION_TABLE_' + sig + ' = [0,0];\n' def make_table(sig, raw): i = Counter.i Counter.i += 1 bad = 'b' + str(i) params = ','.join(['p%d' % p for p in range(len(sig)-1)]) coercions = ';'.join(['p%d = %sp%d%s' % (p, '+' if sig[p+1] != 'i' else '', p, '' if sig[p+1] != 'i' else '|0') for p in range(len(sig)-1)]) + ';' ret = '' if sig[0] == 'v' else ('return %s0' % ('+' if sig[0] != 'i' else '')) return ('function %s(%s) { %s abort(%d); %s };' % (bad, params, coercions, i, ret), raw.replace('[0,', '[' + bad + ',').replace(',0,', ',' + bad + ',').replace(',0,', ',' + bad + ',').replace(',0]', ',' + bad + ']').replace(',0]', ',' + bad + ']').replace(',0\n', ',' + bad + '\n')) infos = [make_table(sig, raw) for sig, raw in last_forwarded_json['Functions']['tables'].iteritems()] function_tables_defs = '\n'.join([info[0] for info in infos] + [info[1] for info in infos]) asm_setup = '' maths = ['Math.' + func for func in ['floor', 'abs', 'sqrt', 'pow', 'cos', 'sin', 'tan', 'acos', 'asin', 'atan', 'atan2', 'exp', 'log', 'ceil', 'imul']] fundamentals = ['Math', 'Int8Array', 'Int16Array', 'Int32Array', 'Uint8Array', 'Uint16Array', 'Uint32Array', 'Float32Array', 'Float64Array'] math_envs = ['Runtime.bitshift64', 'Math.min'] # TODO: move min to maths asm_setup += '\n'.join(['var %s = %s;' % (f.replace('.', '_'), f) for f in math_envs]) basic_funcs = ['abort', 'assert', 'asmPrintInt', 'asmPrintFloat', 'copyTempDouble', 'copyTempFloat'] + [m.replace('.', '_') for m in math_envs] if settings['SAFE_HEAP']: basic_funcs += ['SAFE_HEAP_LOAD', 'SAFE_HEAP_STORE', 'SAFE_HEAP_CLEAR'] if settings['CHECK_HEAP_ALIGN']: basic_funcs += ['CHECK_ALIGN_2', 'CHECK_ALIGN_4', 'CHECK_ALIGN_8'] basic_vars = ['STACKTOP', 'STACK_MAX', 'tempDoublePtr', 'ABORT'] basic_float_vars = ['NaN', 'Infinity'] if forwarded_json['Types']['preciseI64MathUsed']: basic_funcs += ['i64Math_' + op for op in ['add', 'subtract', 'multiply', 'divide', 'modulo']] asm_setup += ''' var i64Math_add = function(a, b, c, d) { i64Math.add(a, b, c, d) }; var i64Math_subtract = function(a, b, c, d) { i64Math.subtract(a, b, c, d) }; var i64Math_multiply = function(a, b, c, d) { i64Math.multiply(a, b, c, d) }; var i64Math_divide = function(a, b, c, d, e) { i64Math.divide(a, b, c, d, e) }; var i64Math_modulo = function(a, b, c, d, e) { i64Math.modulo(a, b, c, d, e) }; ''' asm_runtime_funcs = ['stackAlloc', 'stackSave', 'stackRestore', 'setThrew'] + ['setTempRet%d' % i for i in range(10)] # function tables def asm_coerce(value, sig): if sig == 'v': return value return ('+' if sig != 'i' else '') + value + ('|0' if sig == 'i' else '') function_tables = ['dynCall_' + table for table in last_forwarded_json['Functions']['tables']] function_tables_impls = [] for sig in last_forwarded_json['Functions']['tables'].iterkeys(): args = ','.join(['a' + str(i) for i in range(1, len(sig))]) arg_coercions = ' '.join(['a' + str(i) + '=' + asm_coerce('a' + str(i), sig[i]) + ';' for i in range(1, len(sig))]) coerced_args = ','.join([asm_coerce('a' + str(i), sig[i]) for i in range(1, len(sig))]) ret = ('return ' if sig[0] != 'v' else '') + asm_coerce('FUNCTION_TABLE_%s[index&{{{ FTM_%s }}}](%s)' % (sig, sig, coerced_args), sig[0]) function_tables_impls.append(''' function dynCall_%s(index%s%s) { index = index|0; %s %s; } ''' % (sig, ',' if len(sig) > 1 else '', args, arg_coercions, ret)) # calculate exports exported_implemented_functions = list(exported_implemented_functions) exports = [] if not simple: for export in exported_implemented_functions + asm_runtime_funcs + function_tables: exports.append("%s: %s" % (export, export)) exports = '{ ' + ', '.join(exports) + ' }' else: exports = '_main' # calculate globals try: del forwarded_json['Variables']['globals']['_llvm_global_ctors'] # not a true variable except: pass # If no named globals, only need externals global_vars = map(lambda g: g['name'], filter(lambda g: settings['NAMED_GLOBALS'] or g.get('external') or g.get('unIndexable'), forwarded_json['Variables']['globals'].values())) global_funcs = ['_' + x for x in forwarded_json['Functions']['libraryFunctions'].keys()] def math_fix(g): return g if not g.startswith('Math_') else g.split('_')[1]; asm_global_funcs = ''.join([' var ' + g.replace('.', '_') + '=global.' + g + ';\n' for g in maths]) + \ ''.join([' var ' + g + '=env.' + math_fix(g) + ';\n' for g in basic_funcs + global_funcs]) asm_global_vars = ''.join([' var ' + g + '=env.' + g + '|0;\n' for g in basic_vars + global_vars]) + \ ''.join([' var ' + g + '=+env.' + g + ';\n' for g in basic_float_vars]) # sent data the_global = '{ ' + ', '.join([math_fix(s) + ': ' + s for s in fundamentals]) + ' }' sending = '{ ' + ', '.join([math_fix(s) + ': ' + s for s in basic_funcs + global_funcs + basic_vars + basic_float_vars + global_vars]) + ' }' # received if not simple: receiving = ';\n'.join(['var ' + s + ' = Module["' + s + '"] = asm.' + s for s in exported_implemented_functions + function_tables]) else: receiving = 'var _main = Module["_main"] = asm;' # finalize funcs_js = ''' %s function asmPrintInt(x, y) { Module.print('int ' + x + ',' + y);// + ' ' + new Error().stack); } function asmPrintFloat(x, y) { Module.print('float ' + x + ',' + y);// + ' ' + new Error().stack); } var asm = (function(global, env, buffer) { 'use asm'; var HEAP8 = new global.Int8Array(buffer); var HEAP16 = new global.Int16Array(buffer); var HEAP32 = new global.Int32Array(buffer); var HEAPU8 = new global.Uint8Array(buffer); var HEAPU16 = new global.Uint16Array(buffer); var HEAPU32 = new global.Uint32Array(buffer); var HEAPF32 = new global.Float32Array(buffer); var HEAPF64 = new global.Float64Array(buffer); ''' % (asm_setup,) + '\n' + asm_global_vars + ''' var __THREW__ = 0; var undef = 0; var tempInt = 0, tempBigInt = 0, tempBigIntP = 0, tempBigIntS = 0, tempBigIntR = 0.0, tempBigIntI = 0, tempBigIntD = 0, tempValue = 0, tempDouble = 0.0; ''' + ''.join([''' var tempRet%d = 0;''' % i for i in range(10)]) + '\n' + asm_global_funcs + ''' function stackAlloc(size) { size = size|0; var ret = 0; ret = STACKTOP; STACKTOP = (STACKTOP + size)|0; STACKTOP = ((STACKTOP + 3)>>2)<<2; return ret|0; } function stackSave() { return STACKTOP|0; } function stackRestore(top) { top = top|0; STACKTOP = top; } function setThrew(threw) { threw = threw|0; __THREW__ = threw; } ''' + ''.join([''' function setTempRet%d(value) { value = value|0; tempRet%d = value; } ''' % (i, i) for i in range(10)]) + funcs_js + ''' %s return %s; })(%s, %s, buffer); %s; Runtime.stackAlloc = function(size) { return asm.stackAlloc(size) }; Runtime.stackSave = function() { return asm.stackSave() }; Runtime.stackRestore = function(top) { asm.stackRestore(top) }; ''' % (pre_tables + '\n'.join(function_tables_impls) + '\n' + function_tables_defs.replace('\n', '\n '), exports, the_global, sending, receiving) # Set function table masks def function_table_maskize(js): masks = {} default = None for sig, table in last_forwarded_json['Functions']['tables'].iteritems(): masks[sig] = str(table.count(',')) default = sig def fix(m): sig = m.groups(0)[0] return masks[sig] return re.sub(r'{{{ FTM_([\w\d_$]+) }}}', lambda m: fix(m), js) # masks[m.groups(0)[0]] funcs_js = function_table_maskize(funcs_js) else: function_tables_defs = '\n'.join([table for table in last_forwarded_json['Functions']['tables'].itervalues()]) outfile.write(function_tables_defs) outfile.write(blockaddrsize(indexize(funcs_js))) funcs_js = None outfile.write(indexize(post)) if DEBUG: print >> sys.stderr, ' emscript: phase 3 took %s seconds' % (time.time() - t) outfile.close() def main(args, compiler_engine, cache, jcache, relooper): # Prepare settings for serialization to JSON. settings = {} for setting in args.settings: name, value = setting.strip().split('=', 1) settings[name] = json.loads(value) # Add header defines to settings defines = {} include_root = path_from_root('system', 'include') headers = args.headers[0].split(',') if len(args.headers) > 0 else [] seen_headers = set() while len(headers) > 0: header = headers.pop(0) if not os.path.isabs(header): header = os.path.join(include_root, header) seen_headers.add(header) for line in open(header, 'r'): line = line.replace('\t', ' ') m = re.match('^ *# *define +(?P[-\w_.]+) +\(?(?P[-\w_.|]+)\)?.*', line) if not m: # Catch enum defines of a very limited sort m = re.match('^ +(?P[A-Z_\d]+) += +(?P\d+).*', line) if m: if m.group('name') != m.group('value'): defines[m.group('name')] = m.group('value') #else: # print 'Warning: %s #defined to itself' % m.group('name') # XXX this can happen if we are set to be equal to an enum (with the same name) m = re.match('^ *# *include *["<](?P[\w_.-/]+)[">].*', line) if m: # Find this file found = False for w in [w for w in os.walk(include_root)]: for f in w[2]: curr = os.path.join(w[0], f) if curr.endswith(m.group('name')) and curr not in seen_headers: headers.append(curr) found = True break if found: break #assert found, 'Could not find header: ' + m.group('name') if len(defines) > 0: def lookup(value): try: while not unicode(value).isnumeric(): value = defines[value] return value except: pass try: # 0x300 etc. value = eval(value) return value except: pass try: # CONST1|CONST2 parts = map(lookup, value.split('|')) value = reduce(lambda a, b: a|b, map(eval, parts)) return value except: pass return None for key, value in defines.items(): value = lookup(value) if value is not None: defines[key] = str(value) else: del defines[key] #print >> sys.stderr, 'new defs:', str(defines).replace(',', ',\n '), '\n\n' settings.setdefault('C_DEFINES', {}).update(defines) # libraries libraries = args.libraries[0].split(',') if len(args.libraries) > 0 else [] # Compile the assembly to Javascript. if settings.get('RELOOP'): if not relooper: relooper = cache.get_path('relooper.js') settings.setdefault('RELOOPER', relooper) shared.Building.ensure_relooper(relooper) emscript(configuration, args.infile, settings, args.outfile, libraries, compiler_engine=compiler_engine, jcache=jcache) def _main(environ): parser = optparse.OptionParser( usage='usage: %prog [-h] [-H HEADERS] [-o OUTFILE] [-c COMPILER_ENGINE] [-s FOO=BAR]* infile', description=('You should normally never use this! Use emcc instead. ' 'This is a wrapper around the JS compiler, converting .ll to .js.'), epilog='') parser.add_option('-H', '--headers', default=[], action='append', help='System headers (comma separated) whose #defines should be exposed to the compiled code.') parser.add_option('-L', '--libraries', default=[], action='append', help='Library files (comma separated) to use in addition to those in emscripten src/library_*.') parser.add_option('-o', '--outfile', default=sys.stdout, help='Where to write the output; defaults to stdout.') parser.add_option('-c', '--compiler', default=shared.COMPILER_ENGINE, help='Which JS engine to use to run the compiler; defaults to the one in ~/.emscripten.') parser.add_option('--relooper', default=None, help='Which relooper file to use if RELOOP is enabled') parser.add_option('-s', '--setting', dest='settings', default=[], action='append', metavar='FOO=BAR', help=('Overrides for settings defined in settings.js. ' 'May occur multiple times.')) parser.add_option('-j', '--jcache', action='store_true', default=False, help=('Enable jcache (ccache-like caching of compilation results, for faster incremental builds).')) parser.add_option('--suppressUsageWarning', action='store_true', default=environ.get('EMSCRIPTEN_SUPPRESS_USAGE_WARNING'), help=('Suppress usage warning')) # Convert to the same format that argparse would have produced. keywords, positional = parser.parse_args() if not keywords.suppressUsageWarning: print >> sys.stderr, ''' ============================================================== WARNING: You should normally never use this! Use emcc instead. ============================================================== ''' if len(positional) != 1: raise RuntimeError('Must provide exactly one positional argument.') keywords.infile = os.path.abspath(positional[0]) if isinstance(keywords.outfile, basestring): keywords.outfile = open(keywords.outfile, 'w') if keywords.relooper: relooper = os.path.abspath(keywords.relooper) else: relooper = None # use the cache cache = cache_module.Cache() temp_files.run_and_clean(lambda: main( keywords, compiler_engine=os.path.abspath(keywords.compiler), cache=cache, jcache=cache_module.JCache(cache) if keywords.jcache else None, relooper=relooper)) if __name__ == '__main__': _main(environ=os.environ)