scons/crossmingw.py

   1 """SCons.Tool.gcc
   2
   3 Tool-specific initialization for MinGW (http://www.mingw.org/)
   4
   5 There normally shouldn't be any need to import this module directly.
   6 It will usually be imported through the generic SCons.Tool.Tool()
   7 selection method.
   8
   9 See also http://www.scons.org/wiki/CrossCompilingMingw
  10 """
  11
  12 #
  13 # Copyright (c) 2001, 2002, 2003, 2004 The SCons Foundation
  14 #
  15 # Permission is hereby granted, free of charge, to any person obtaining
  16 # a copy of this software and associated documentation files (the
  17 # "Software"), to deal in the Software without restriction, including
  18 # without limitation the rights to use, copy, modify, merge, publish,
  19 # distribute, sublicense, and/or sell copies of the Software, and to
  20 # permit persons to whom the Software is furnished to do so, subject to
  21 # the following conditions:
  22 #
  23 # The above copyright notice and this permission notice shall be included
  24 # in all copies or substantial portions of the Software.
  25 #
  26 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  27 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  28 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 #
  34
  35 import os
  36 import os.path
  37 import string
  38
  39 import SCons.Action
  40 import SCons.Builder
  41 import SCons.Tool
  42 import SCons.Util
  43
  44 # This is what we search for to find mingw:
  45 prefixes = SCons.Util.Split("""
  46     mingw32-
  47     mingw32msvc-
  48     i386-mingw32-
  49     i486-mingw32-
  50     i586-mingw32-
  51     i686-mingw32-
  52     i386-mingw32msvc-
  53     i486-mingw32msvc-
  54     i586-mingw32msvc-
  55     i686-mingw32msvc-
  56     i686-pc-mingw32-
  57 """)
  58
  59 def find(env):
  60     for prefix in prefixes:
  61         # First search in the SCons path and then the OS path:
  62         if env.WhereIs(prefix + 'gcc') or SCons.Util.WhereIs(prefix + 'gcc'):
  63             return prefix
  64
  65     return ''
  66
  67 def shlib_generator(target, source, env, for_signature):
  68     cmd = SCons.Util.CLVar(['$SHLINK', '$SHLINKFLAGS'])
  69
  70     dll = env.FindIxes(target, 'SHLIBPREFIX', 'SHLIBSUFFIX')
  71     if dll: cmd.extend(['-o', dll])
  72
  73     cmd.extend(['$SOURCES', '$_LIBDIRFLAGS', '$_LIBFLAGS'])
  74
  75     implib = env.FindIxes(target, 'LIBPREFIX', 'LIBSUFFIX')
  76     if implib: cmd.append('-Wl,--out-implib,'+implib.get_string(for_signature))
  77
  78     def_target = env.FindIxes(target, 'WIN32DEFPREFIX', 'WIN32DEFSUFFIX')
  79     if def_target: cmd.append('-Wl,--output-def,'+def_target.get_string(for_signature))
  80
  81     return [cmd]
  82
  83 def shlib_emitter(target, source, env):
  84     dll = env.FindIxes(target, 'SHLIBPREFIX', 'SHLIBSUFFIX')
  85     no_import_lib = env.get('no_import_lib', 0)
  86
  87     if not dll:
  88         raise SCons.Errors.UserError, "A shared library should have exactly one target with the suffix: %s" % env.subst("$SHLIBSUFFIX")
  89
  90     if not no_import_lib and \
  91        not env.FindIxes(target, 'LIBPREFIX', 'LIBSUFFIX'):
  92
  93         # Append an import library to the list of targets.
  94         target.append(env.ReplaceIxes(dll,
  95                                       'SHLIBPREFIX', 'SHLIBSUFFIX',
  96                                       'LIBPREFIX', 'LIBSUFFIX'))
  97
  98     # Append a def file target if there isn't already a def file target
  99     # or a def file source. There is no option to disable def file
 100     # target emitting, because I can't figure out why someone would ever
 101     # want to turn it off.
 102     def_source = env.FindIxes(source, 'WIN32DEFPREFIX', 'WIN32DEFSUFFIX')
 103     def_target = env.FindIxes(target, 'WIN32DEFPREFIX', 'WIN32DEFSUFFIX')
 104     if not def_source and not def_target:
 105         target.append(env.ReplaceIxes(dll,
 106                                       'SHLIBPREFIX', 'SHLIBSUFFIX',
 107                                       'WIN32DEFPREFIX', 'WIN32DEFSUFFIX'))
 108
 109     return (target, source)
 110
 111
 112 shlib_action = SCons.Action.Action(shlib_generator, '$SHLINKCOMSTR', generator=1)
 113
 114 res_action = SCons.Action.Action('$RCCOM', '$RCCOMSTR')
 115
 116 res_builder = SCons.Builder.Builder(action=res_action, suffix='.o',
 117                                     source_scanner=SCons.Tool.SourceFileScanner)
 118 SCons.Tool.SourceFileScanner.add_scanner('.rc', SCons.Defaults.CScan)
 119
 120 def generate(env):
 121     mingw_prefix = find(env)
 122
 123     if mingw_prefix:
 124         dir = os.path.dirname(env.WhereIs(mingw_prefix + 'gcc') or SCons.Util.WhereIs(mingw_prefix + 'gcc'))
 125
 126         # The mingw bin directory must be added to the path:
 127         path = env['ENV'].get('PATH', [])
 128         if not path:
 129             path = []
 130         if SCons.Util.is_String(path):
 131             path = string.split(path, os.pathsep)
 132
 133         env['ENV']['PATH'] = string.join([dir] + path, os.pathsep)
 134
 135     # Most of mingw is the same as gcc and friends...
 136     gnu_tools = ['gcc', 'g++', 'gnulink', 'ar', 'gas']
 137     for tool in gnu_tools:
 138         SCons.Tool.Tool(tool)(env)
 139
 140     #... but a few things differ:
 141     env['CC'] = mingw_prefix + 'gcc'
 142     env['SHCCFLAGS'] = SCons.Util.CLVar('$CCFLAGS')
 143     env['CXX'] = mingw_prefix + 'g++'
 144     env['SHCXXFLAGS'] = SCons.Util.CLVar('$CXXFLAGS')
 145     env['SHLINKFLAGS'] = SCons.Util.CLVar('$LINKFLAGS -shared')
 146     env['SHLINKCOM']   = shlib_action
 147     env.Append(SHLIBEMITTER = [shlib_emitter])
 148     env['LINK'] = mingw_prefix + 'g++'
 149     env['AR'] = mingw_prefix + 'ar'
 150     env['RANLIB'] = mingw_prefix + 'ranlib'
 151     env['LINK'] = mingw_prefix + 'g++'
 152     env['AS'] = mingw_prefix + 'as'
 153     env['WIN32DEFPREFIX']        = ''
 154     env['WIN32DEFSUFFIX']        = '.def'
 155     env['SHOBJSUFFIX'] = '.o'
 156     env['STATIC_AND_SHARED_OBJECTS_ARE_THE_SAME'] = 1
 157
 158     env['RC'] = mingw_prefix + 'windres'
 159     env['RCFLAGS'] = SCons.Util.CLVar('')
 160     env['RCCOM'] = '$RC $_CPPDEFFLAGS $_CPPINCFLAGS ${INCPREFIX}${SOURCE.dir} $RCFLAGS -i $SOURCE -o $TARGET'
 161     env['BUILDERS']['RES'] = res_builder
 162
 163     # Some setting from the platform also have to be overridden:
 164     env['OBJPREFIX']      = ''
 165     env['OBJSUFFIX']      = '.o'
 166     env['SHOBJPREFIX']    = '$OBJPREFIX'
 167     env['SHOBJSUFFIX']    = '$OBJSUFFIX'
 168     env['PROGPREFIX']     = ''
 169     env['PROGSUFFIX']     = '.exe'
 170     env['LIBPREFIX']      = 'lib'
 171     env['LIBSUFFIX']      = '.a'
 172     env['SHLIBPREFIX']    = ''
 173     env['SHLIBSUFFIX']    = '.dll'
 174     env['LIBPREFIXES']    = [ 'lib', '' ]
 175     env['LIBSUFFIXES']    = [ '.a', '.lib' ]
 176
 177     # MinGW port of gdb does not handle well dwarf debug info which is the
 178     # default in recent gcc versions
 179     env.AppendUnique(CFLAGS = ['-gstabs'])
 180
 181     env.AppendUnique(CPPDEFINES = [('__MSVCRT_VERSION__', '0x0700')])
 182     #env.AppendUnique(LIBS = ['iberty'])
 183     env.AppendUnique(SHLINKFLAGS = ['-Wl,--enable-stdcall-fixup'])
 184     #env.AppendUnique(SHLINKFLAGS = ['-Wl,--kill-at'])
 185
 186 def exists(env):
 187     return find(env)