# -*- 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 shlex
import subprocess
import tempfile
import sys
import distutils
from distutils.msvccompiler import MSVCCompiler
from distutils.unixccompiler import UnixCCompiler
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.
if compiler_name == 'msvc':
# For MSVC, we need to create a instance of a subclass of distutil's
# MSVC9Compiler class, as it does not provide a preprocess()
# implementation
from . import msvccompiler
self.compiler = msvccompiler.get_msvc_compiler()
else:
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.compiler)
self._cflags_no_deprecation_warnings = "-Wno-deprecated-declarations"
def get_internal_link_flags(self, args, libtool, libraries, extra_libraries, libpaths):
# An "internal" link is where the library to be introspected
# is being built in the current directory.
runtime_path_envvar = []
runtime_paths = []
if os.name == 'nt':
runtime_path_envvar = ['LIB', 'PATH']
else:
runtime_path_envvar = ['LD_LIBRARY_PATH', 'DYLD_LIBRARY_PATH']
# Search the current directory first
# (This flag is not supported nor needed for Visual C++)
args.append('-L.')
if not libtool:
# https://bugzilla.gnome.org/show_bug.cgi?id=625195
args.append('-Wl,-rpath,.')
# Ensure libraries are always linked as we are going to use ldd to work
# out their names later
if sys.platform != 'darwin':
args.append('-Wl,--no-as-needed')
for library in libraries + extra_libraries:
if self.check_is_msvc():
# Note that Visual Studio builds do not use libtool!
if library != 'm':
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:
# The dumper program needs to look for dynamic libraries
# in the library paths first
if self.check_is_msvc():
library_path = library_path.replace('/', '\\')
args.append('-libpath:' + library_path)
else:
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)
runtime_paths.append(library_path)
for envvar in runtime_path_envvar:
if envvar in os.environ:
os.environ[envvar] = \
os.pathsep.join(runtime_paths + [os.environ[envvar]])
else:
os.environ[envvar] = os.pathsep.join(runtime_paths)
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():
# Visual Studio: don't attempt to link to m.lib
if library != 'm':
args.append(library + ".lib")
else:
if library.endswith(".la"): # explicitly specified libtool library
args.append(library)
else:
args.append('-l' + library)
def preprocess(self, source, output, cpp_options):
extra_postargs = ['-C']
(include_paths, macros, postargs) = self._set_cpp_options(cpp_options)
# We always want to include the current path
include_dirs = ['.']
include_dirs.extend(include_paths)
extra_postargs.extend(postargs)
# Define these macros when using Visual C++ to silence many warnings,
# and prevent stepping on many Visual Studio-specific items, so that
# we don't have to handle them specifically in scannerlexer.l
if self.check_is_msvc():
macros.append(('_USE_DECLSPECS_FOR_SAL', None))
macros.append(('_CRT_SECURE_NO_WARNINGS', None))
macros.append(('_CRT_NONSTDC_NO_WARNINGS', None))
macros.append(('SAL_NO_ATTRIBUTE_DECLARATIONS', None))
self.compiler.preprocess(source=source,
output_file=output,
macros=macros,
include_dirs=include_dirs,
extra_postargs=extra_postargs)
def compile(self, pkg_config_cflags, cpp_includes, source, init_sections):
extra_postargs = []
includes = []
source_str = ''.join(source)
tmpdir_idx = source_str.rfind(os.sep, 0, source_str.rfind(os.sep))
(include_paths, macros, extra_args) = \
self._set_cpp_options(pkg_config_cflags)
for include in cpp_includes:
includes.append(include)
if isinstance(self.compiler, UnixCCompiler):
# This is to handle the case where macros are defined in CFLAGS
cflags = os.environ.get('CFLAGS')
if cflags:
for i, cflag in enumerate(shlex.split(cflags)):
if cflag.startswith('-D'):
stridx = cflag.find('=')
if stridx > -1:
macroset = (cflag[2:stridx],
cflag[stridx + 1:])
else:
macroset = (cflag[2:], None)
if macroset not in macros:
macros.append(macroset)
# Do not add -Wall when using init code as we do not include any
# header of the library being introspected
if self.compiler_cmd == 'gcc' and not init_sections:
extra_postargs.append('-Wall')
extra_postargs.append(self._cflags_no_deprecation_warnings)
includes.extend(include_paths)
extra_postargs.extend(extra_args)
return self.compiler.compile(sources=source,
macros=macros,
include_dirs=includes,
extra_postargs=extra_postargs,
output_dir=os.path.abspath(os.sep))
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 .lib gets linked to.
# 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>
args.append('dumpbin.exe')
args.append('-symbols')
# Work around the attempt to resolve m.lib on Python 2.x
if sys.version_info.major < 3:
libraries[:] = [lib for lib in libraries if lib != 'm']
# When we are not using Visual C++ (i.e. we are using GCC)...
else:
libtool = utils.get_libtool_command(options)
if libtool:
if os.name == 'nt':
args.append(utils.which(os.environ.get('SHELL', 'sh.exe')))
args.extend(libtool)
args.append('--mode=execute')
args.extend([os.environ.get('DLLTOOL', 'dlltool.exe'), '--identify'])
proc = subprocess.Popen([self.compiler_cmd, '-print-search-dirs'],
stdout=subprocess.PIPE)
o, e = proc.communicate()
libsearch = options.library_paths
for line in o.decode('ascii').splitlines():
if line.startswith('libraries: '):
libsearch += line[len('libraries: '):].split(os.pathsep)
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):
if self.check_is_msvc():
tmp_fd, tmp_filename = \
tempfile.mkstemp(prefix='g-ir-win32-resolve-lib-')
# This is dumb, but it is life... Windows does not like one
# trying to write to a file when its FD is not closed first,
# when we use a flag in a program to do so. So, close,
# write to temp file with dumpbin and *then* re-open the
# file for reading.
os.close(tmp_fd)
output_flag = ['-out:' + tmp_filename]
proc = subprocess.call(args + [implib] + output_flag,
stdout=subprocess.PIPE)
with open(tmp_filename, 'r') as tmp_fileobj:
for line in tmp_fileobj.read().splitlines():
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
tmp_fileobj.close()
os.unlink(tmp_filename)
else:
proc = subprocess.Popen(args + [implib],
stdout=subprocess.PIPE)
o, e = proc.communicate()
for line in o.decode('ascii').splitlines():
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
# Private APIs
def _set_cpp_options(self, options):
includes = []
macros = []
other_options = []
for o in options:
option = utils.cflag_real_include_path(o)
if option.startswith('-I'):
includes.append(option[len('-I'):])
elif option.startswith('-D'):
macro = option[len('-D'):]
macro_index = macro.find('=')
if macro_index == -1:
macro_name = macro
macro_value = None
else:
macro_name = macro[:macro_index]
macro_value = macro[macro_index + 1:]
macros.append((macro_name, macro_value))
elif option.startswith('-U'):
macros.append((option[len('-U'):],))
else:
# We expect the preprocessor to remove macros. If debugging is turned
# up high enough that won't happen, so don't add those flags. Bug #720504
if option not in ['-g3', '-ggdb3', '-gstabs3', '-gcoff3', '-gxcoff3', '-gvms3']:
other_options.append(option)
return (includes, macros, other_options)