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gxx.py

#!/usr/bin/env python
# encoding: utf-8
# Thomas Nagy, 2006 (ita)
# Ralf Habacker, 2006 (rh)
# Yinon Ehrlich, 2009

import os, sys
import Configure, Options, Utils
import ccroot, ar
from Configure import conftest

@conftest
def find_gxx(conf):
      cxx = conf.find_program(['g++', 'c++'], var='CXX', mandatory=True)
      cxx = conf.cmd_to_list(cxx)
      ccroot.get_cc_version(conf, cxx, gcc=True)
      conf.env.CXX_NAME = 'gcc'
      conf.env.CXX      = cxx

@conftest
def gxx_common_flags(conf):
      v = conf.env

      # CPPFLAGS CXXDEFINES _CXXINCFLAGS _CXXDEFFLAGS
      v['CXXFLAGS_DEBUG'] = ['-g']
      v['CXXFLAGS_RELEASE'] = ['-O2']

      v['CXX_SRC_F']           = ''
      v['CXX_TGT_F']           = ['-c', '-o', ''] # shell hack for -MD
      v['CPPPATH_ST']          = '-I%s' # template for adding include paths

      # linker
      if not v['LINK_CXX']: v['LINK_CXX'] = v['CXX']
      v['CXXLNK_SRC_F']        = ''
      v['CXXLNK_TGT_F']        = ['-o', ''] # shell hack for -MD

      v['LIB_ST']              = '-l%s' # template for adding libs
      v['LIBPATH_ST']          = '-L%s' # template for adding libpaths
      v['STATICLIB_ST']        = '-l%s'
      v['STATICLIBPATH_ST']    = '-L%s'
      v['RPATH_ST']            = '-Wl,-rpath,%s'
      v['CXXDEFINES_ST']       = '-D%s'

      v['SONAME_ST']           = '-Wl,-h,%s'
      v['SHLIB_MARKER']        = '-Wl,-Bdynamic'
      v['STATICLIB_MARKER']    = '-Wl,-Bstatic'
      v['FULLSTATIC_MARKER']   = '-static'

      # program
      v['program_PATTERN']     = '%s'

      # shared library
      v['shlib_CXXFLAGS']      = ['-fPIC', '-DPIC'] # avoid using -DPIC, -fPIC aleady defines the __PIC__ macro
      v['shlib_LINKFLAGS']     = ['-shared']
      v['shlib_PATTERN']       = 'lib%s.so'

      # static lib
      v['staticlib_LINKFLAGS'] = ['-Wl,-Bstatic']
      v['staticlib_PATTERN']   = 'lib%s.a'

      # osx stuff
      v['LINKFLAGS_MACBUNDLE'] = ['-bundle', '-undefined', 'dynamic_lookup']
      v['CCFLAGS_MACBUNDLE']   = ['-fPIC']
      v['macbundle_PATTERN']   = '%s.bundle'

@conftest
def gxx_modifier_win32(conf):
      v = conf.env
      v['program_PATTERN']     = '%s.exe'

      v['shlib_PATTERN']       = '%s.dll'
      v['implib_PATTERN']      = 'lib%s.dll.a'
      v['IMPLIB_ST']           = '-Wl,--out-implib,%s'

      dest_arch = v['DEST_CPU']
      if dest_arch == 'x86':
            # On 32-bit x86, gcc emits a message telling the -fPIC option is ignored on this arch, so we remove that flag.
            v['shlib_CXXFLAGS'] = ['-DPIC'] # TODO this is a wrong define, we don't use -fPIC!

      v.append_value('shlib_CXXFLAGS', '-DDLL_EXPORT') # TODO adding nonstandard defines like this DLL_EXPORT is not a good idea

      # Auto-import is enabled by default even without this option,
      # but enabling it explicitly has the nice effect of suppressing the rather boring, debug-level messages
      # that the linker emits otherwise.
      v.append_value('LINKFLAGS', '-Wl,--enable-auto-import')

@conftest
def gxx_modifier_cygwin(conf):
      gxx_modifier_win32(conf)
      v = conf.env
      v['shlib_PATTERN']       = 'cyg%s.dll'
      v.append_value('shlib_LINKFLAGS', '-Wl,--enable-auto-image-base')

@conftest
def gxx_modifier_darwin(conf):
      v = conf.env
      v['shlib_CXXFLAGS']      = ['-fPIC', '-compatibility_version', '1', '-current_version', '1']
      v['shlib_LINKFLAGS']     = ['-dynamiclib']
      v['shlib_PATTERN']       = 'lib%s.dylib'

      v['staticlib_LINKFLAGS'] = []

      v['SHLIB_MARKER']        = ''
      v['STATICLIB_MARKER']    = ''
      v['SONAME_ST']           = '' 

@conftest
def gxx_modifier_aix(conf):
      v = conf.env
      v['program_LINKFLAGS']   = ['-Wl,-brtl']

      v['shlib_LINKFLAGS']     = ['-shared', '-Wl,-brtl,-bexpfull']

      v['SHLIB_MARKER']        = ''

@conftest
def gxx_modifier_platform(conf):
      # * set configurations specific for a platform.
      # * the destination platform is detected automatically by looking at the macros the compiler predefines,
      #   and if it's not recognised, it fallbacks to sys.platform.
      dest_os = conf.env['DEST_OS'] or Utils.unversioned_sys_platform()
      gxx_modifier_func = globals().get('gxx_modifier_' + dest_os)
      if gxx_modifier_func:
                  gxx_modifier_func(conf)

def detect(conf):
      conf.find_gxx()
      conf.find_cpp()
      conf.find_ar()
      conf.gxx_common_flags()
      conf.gxx_modifier_platform()
      conf.cxx_load_tools()
      conf.cxx_add_flags()


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