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#!/usr/bin/env python
# -*- Mode: Python -*-
# GObject-Introspection - a framework for introspecting GObject libraries
# Copyright (C) 2009 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#
import os
import platform
import re
import subprocess
from .utils import get_libtool_command, extract_libtool_shlib, which
# For .la files, the situation is easy.
def _resolve_libtool(options, binary, libraries):
shlibs = []
for library in libraries:
shlib = extract_libtool_shlib(library)
if shlib:
shlibs.append(shlib)
return shlibs
# Assume ldd output is something vaguely like
#
# libpangoft2-1.0.so.0 => /usr/lib/libpangoft2-1.0.so.0 (0x006c1000)
#
# We say that if something in the output looks like libpangoft2<blah>
# then the *first* such in the output is the soname. We require <blah>
# to start with [^A-Za-z0-9_-] to avoid problems with libpango vs libpangoft2
#
# The negative lookbehind at the start is to avoid problems if someone
# is crazy enough to name a library liblib<foo> when lib<foo> exists.
#
# Match absolute paths on OS X to conform to how libraries are usually
# referenced on OS X systems.
def _ldd_library_pattern(library_name):
pattern = "(?<![A-Za-z0-9_-])(lib*%s[^A-Za-z0-9_-][^\s\(\)]*)"
if platform.system() == 'Darwin':
pattern = "([^\s]*lib*%s[^A-Za-z0-9_-][^\s\(\)]*)"
return re.compile(pattern % re.escape(library_name))
# This is a what we do for non-la files. We assume that we are on an
# ELF-like system where ldd exists and the soname extracted with ldd is
# a filename that can be opened with dlopen().
#
# On OS X this will need a straightforward alternate implementation
# in terms of otool.
#
# Windows is more difficult, since there isn't always a straightforward
# translation between library name (.lib) and the name of the .dll, so
# extracting the dll names from the compiled app may not be sufficient.
# We might need to hunt down the .lib in the compile-time path and
# use that to figure out the name of the DLL.
#
def _resolve_non_libtool(options, binary, libraries):
if not libraries:
return []
if platform.platform().startswith('OpenBSD'):
# Hack for OpenBSD when using the ports' libtool which uses slightly
# different directories to store the libraries in. So rewite binary.args[0]
# by inserting '.libs/'.
old_argdir = binary.args[0]
new_libsdir = os.path.join(os.path.dirname(binary.args[0]), '.libs/')
new_lib = new_libsdir + os.path.basename(binary.args[0])
if os.path.exists(new_lib):
binary.args[0] = new_lib
os.putenv('LD_LIBRARY_PATH', new_libsdir)
else:
binary.args[0] = old_argdir
if os.name == 'nt':
args = []
compiler_cmd = os.environ.get('CC', 'cc')
libsearch = []
# When we are using Visual C++...
if 'cl.exe' in compiler_cmd or 'cl' in compiler_cmd:
# The search path of the .lib's on Visual C++
# is dependent on the LIB environmental variable,
# so just query for that
is_msvc = True
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:
is_msvc = False
libtool = get_libtool_command(options)
if libtool:
args.append(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([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 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))
else:
args = []
libtool = get_libtool_command(options)
if libtool:
args.extend(libtool)
args.append('--mode=execute')
platform_system = platform.system()
if platform_system == 'Darwin':
args.extend(['otool', '-L', binary.args[0]])
else:
args.extend(['ldd', binary.args[0]])
proc = subprocess.Popen(args, stdout=subprocess.PIPE)
patterns = {}
for library in libraries:
patterns[library] = _ldd_library_pattern(library)
shlibs = []
for line in proc.stdout:
for library, pattern in patterns.iteritems():
m = pattern.search(line)
if m:
del patterns[library]
shlibs.append(m.group(1))
break
if len(patterns) > 0:
raise SystemExit(
"ERROR: can't resolve libraries to shared libraries: " +
", ".join(patterns.keys()))
return shlibs
# We want to resolve a set of library names (the <foo> of -l<foo>)
# against a library to find the shared library name. The shared
# library name is suppose to be what you pass to dlopen() (or
# equivalent). And we want to do this using the libraries that 'binary'
# is linking against.
#
def resolve_shlibs(options, binary, libraries):
libtool = filter(lambda x: x.endswith(".la"), libraries)
non_libtool = filter(lambda x: not x.endswith(".la"), libraries)
return (_resolve_libtool(options, binary, libtool) +
_resolve_non_libtool(options, binary, non_libtool))
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