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# -*- Mode: Python -*-
# GObject-Introspection - a framework for introspecting GObject libraries
# Copyright (C) 2014 Chun-wei Fan
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
import os
import subprocess
import sys
import distutils
from distutils.msvccompiler import MSVCCompiler
from distutils.cygwinccompiler import Mingw32CCompiler
from distutils.sysconfig import customize_compiler
from . import utils
class CCompiler(object):
compiler_cmd = ''
compiler = None
_cflags_no_deprecation_warnings = ''
def __init__(self,
environ=os.environ,
osname=os.name,
compiler_name=None):
if osname == 'nt':
# The compiler used here on Windows may well not be
# the same compiler that was used to build Python,
# as the official Python binaries are built with
# Visual Studio
if compiler_name is None:
if environ.get('MSYSTEM') == 'MINGW32' or environ.get('MSYSTEM') == 'MINGW64':
compiler_name = 'mingw32'
else:
compiler_name = distutils.ccompiler.get_default_compiler()
if compiler_name != 'msvc' and \
compiler_name != 'mingw32':
raise SystemExit('Specified Compiler \'%s\' is unsupported.' % compiler_name)
else:
# XXX: Is it common practice to use a non-Unix compiler
# class instance on non-Windows on platforms g-i supports?
compiler_name = distutils.ccompiler.get_default_compiler()
# Now, create the distutils ccompiler instance based on the info we have.
self.compiler = distutils.ccompiler.new_compiler(compiler=compiler_name)
customize_compiler(self.compiler)
# customize_compiler from distutils only does customization
# for 'unix' compiler type. Also, avoid linking to msvcrxx.dll
# for MinGW builds as the dumper binary does not link to the
# Python DLL, but link to msvcrt.dll if necessary.
if isinstance(self.compiler, Mingw32CCompiler):
if self.compiler.dll_libraries != ['msvcrt']:
self.compiler.dll_libraries = []
if self.compiler.preprocessor is None:
self.compiler.preprocessor = self.compiler.compiler + ['-E']
if self.check_is_msvc():
# We trick distutils to believe that we are (always) using a
# compiler supplied by a Windows SDK, so that we avoid launching
# a new build environment to detect the compiler that is used to
# build Python itself, which is not desirable, so that we use the
# compiler commands (and env) as-is.
os.environ['DISTUTILS_USE_SDK'] = '1'
if 'MSSdk' not in os.environ:
if 'WindowsSDKDir' in os.environ:
os.environ['MSSdk'] = os.environ.get('WindowsSDKDir')
elif os.environ.get('VCInstallDir'):
os.environ['MSSdk'] = os.environ.get('VCInstallDir')
self.compiler_cmd = 'cl.exe'
self._cflags_no_deprecation_warnings = "-wd4996"
else:
if (isinstance(self.compiler, Mingw32CCompiler)):
self.compiler_cmd = self.compiler.compiler[0]
else:
self.compiler_cmd = ''.join(self.compiler.executables['compiler'])
self._cflags_no_deprecation_warnings = "-Wno-deprecated-declarations"
def get_internal_link_flags(self, args, libtool, libraries, libpaths):
# An "internal" link is where the library to be introspected
# is being built in the current directory.
# Search the current directory first
# (This flag is not supported nor needed for Visual C++)
if not self.check_is_msvc():
args.append('-L.')
# https://bugzilla.gnome.org/show_bug.cgi?id=625195
if not libtool:
args.append('-Wl,-rpath=.')
args.append('-Wl,--no-as-needed')
for library in libraries:
if self.check_is_msvc():
args.append(library + '.lib')
else:
if library.endswith(".la"): # explicitly specified libtool library
args.append(library)
else:
args.append('-l' + library)
for library_path in libpaths:
# Not used/needed on Visual C++, and -Wl,-rpath options
# will cause grief
if not self.check_is_msvc():
args.append('-L' + library_path)
if os.path.isabs(library_path):
if libtool:
args.append('-rpath')
args.append(library_path)
else:
args.append('-Wl,-rpath=' + library_path)
def get_external_link_flags(self, args, libraries):
# An "external" link is where the library to be introspected
# is installed on the system; this case is used for the scanning
# of GLib in gobject-introspection itself.
for library in libraries:
if self.check_is_msvc():
args.append(library + '.lib')
else:
if library.endswith(".la"): # explicitly specified libtool library
args.append(library)
else:
args.append('-l' + library)
def resolve_windows_libs(self, libraries, options):
args = []
libsearch = []
# When we are using Visual C++...
if self.check_is_msvc():
# The search path of the .lib's on Visual C++
# is dependent on the LIB environmental variable,
# so just query for that
libpath = os.environ.get('LIB')
libsearch = libpath.split(';')
# Use the dumpbin utility that's included in
# every Visual C++ installation to find out which
# DLL the library gets linked to
args.append('dumpbin.exe')
args.append('-symbols')
# When we are not using Visual C++ (i.e. we are using GCC)...
else:
libtool = utils.get_libtool_command(options)
if libtool:
args.append(utils.which(os.environ.get('SHELL', 'sh.exe')))
args.extend(libtool)
args.append('--mode=execute')
# FIXME: it could have prefix (i686-w64-mingw32-dlltool.exe)
args.extend(['dlltool.exe', '--identify'])
proc = subprocess.Popen([self.compiler_cmd, '-print-search-dirs'],
stdout=subprocess.PIPE)
o, e = proc.communicate()
for line in o.splitlines():
if line.startswith('libraries: '):
libsearch = line[len('libraries: '):].split(';')
shlibs = []
not_resolved = []
for lib in libraries:
found = False
candidates = [
'lib%s.dll.a' % lib,
'lib%s.a' % lib,
'%s.dll.a' % lib,
'%s.a' % lib,
'%s.lib' % lib,
]
for l in libsearch:
if found:
break
if l.startswith('='):
l = l[1:]
for c in candidates:
if found:
break
implib = os.path.join(l, c)
if os.path.exists(implib):
proc = subprocess.Popen(args + [implib],
stdout=subprocess.PIPE)
o, e = proc.communicate()
for line in o.splitlines():
if self.check_is_msvc():
# On Visual Studio, dumpbin -symbols something.lib gives the
# filename of DLL without the '.dll' extension that something.lib
# links to, in the line that contains
# __IMPORT_DESCRIPTOR_<dll_filename_that_something.lib_links_to>
if '__IMPORT_DESCRIPTOR_' in line:
line_tokens = line.split()
for item in line_tokens:
if item.startswith('__IMPORT_DESCRIPTOR_'):
shlibs.append(item[20:] + '.dll')
found = True
break
if found:
break
else:
shlibs.append(line)
found = True
break
if not found:
not_resolved.append(lib)
if len(not_resolved) > 0:
raise SystemExit(
"ERROR: can't resolve libraries to shared libraries: " +
", ".join(not_resolved))
return shlibs
def check_is_msvc(self):
if isinstance(self.compiler, MSVCCompiler):
return True
else:
return False
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