third_party/waf/waflib/extras/c_emscripten.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 vi:ts=4:noexpandtab
   3
   4 import subprocess, shlex, sys
   5
   6 from waflib.Tools import ccroot, gcc, gxx
   7 from waflib.Configure import conf
   8 from waflib.TaskGen import after_method, feature
   9
  10 from waflib.Tools.compiler_c import c_compiler
  11 from waflib.Tools.compiler_cxx import cxx_compiler
  12
  13 for supported_os in ('linux', 'darwin', 'gnu', 'aix'):
  14         c_compiler[supported_os].append('c_emscripten')
  15         cxx_compiler[supported_os].append('c_emscripten')
  16
  17
  18 @conf
  19 def get_emscripten_version(conf, cc):
  20         """
  21         Emscripten doesn't support processing '-' like clang/gcc
  22         """
  23
  24         dummy = conf.cachedir.parent.make_node("waf-emscripten.c")
  25         dummy.write("")
  26         cmd = cc + ['-dM', '-E', '-x', 'c', dummy.abspath()]
  27         env = conf.env.env or None
  28         try:
  29                 p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env)
  30                 out = p.communicate()[0]
  31         except Exception as e:
  32                 conf.fatal('Could not determine emscripten version %r: %s' % (cmd, e))
  33
  34         if not isinstance(out, str):
  35                 out = out.decode(sys.stdout.encoding or 'latin-1')
  36
  37         k = {}
  38         out = out.splitlines()
  39         for line in out:
  40                 lst = shlex.split(line)
  41                 if len(lst)>2:
  42                         key = lst[1]
  43                         val = lst[2]
  44                         k[key] = val
  45
  46         if not ('__clang__' in k and 'EMSCRIPTEN' in k):
  47                 conf.fatal('Could not determine the emscripten compiler version.')
  48
  49         conf.env.DEST_OS = 'generic'
  50         conf.env.DEST_BINFMT = 'elf'
  51         conf.env.DEST_CPU = 'asm-js'
  52         conf.env.CC_VERSION = (k['__clang_major__'], k['__clang_minor__'], k['__clang_patchlevel__'])
  53         return k
  54
  55 @conf
  56 def find_emscripten(conf):
  57         cc = conf.find_program(['emcc'], var='CC')
  58         conf.get_emscripten_version(cc)
  59         conf.env.CC = cc
  60         conf.env.CC_NAME = 'emscripten'
  61         cxx = conf.find_program(['em++'], var='CXX')
  62         conf.env.CXX = cxx
  63         conf.env.CXX_NAME = 'emscripten'
  64         conf.find_program(['emar'], var='AR')
  65
  66 def configure(conf):
  67         conf.find_emscripten()
  68         conf.find_ar()
  69         conf.gcc_common_flags()
  70         conf.gxx_common_flags()
  71         conf.cc_load_tools()
  72         conf.cc_add_flags()
  73         conf.cxx_load_tools()
  74         conf.cxx_add_flags()
  75         conf.link_add_flags()
  76         conf.env.ARFLAGS = ['rcs']
  77         conf.env.cshlib_PATTERN = '%s.js'
  78         conf.env.cxxshlib_PATTERN = '%s.js'
  79         conf.env.cstlib_PATTERN = '%s.a'
  80         conf.env.cxxstlib_PATTERN = '%s.a'
  81         conf.env.cprogram_PATTERN = '%s.html'
  82         conf.env.cxxprogram_PATTERN = '%s.html'
  83         conf.env.CXX_TGT_F           = ['-c', '-o', '']
  84         conf.env.CC_TGT_F            = ['-c', '-o', '']
  85         conf.env.CXXLNK_TGT_F        = ['-o', '']
  86         conf.env.CCLNK_TGT_F         = ['-o', '']
  87         conf.env.append_value('LINKFLAGS',['-Wl,--enable-auto-import'])