mirror of https://github.com/python/cpython
356 lines
15 KiB
Python
356 lines
15 KiB
Python
"""CCompiler implementations for Cygwin and mingw32 versions of GCC.
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This module contains the CygwinCCompiler class, a subclass of
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UnixCCompiler that handles the Cygwin port of the GNU C compiler to
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Windows, and the Mingw32CCompiler class which handles the mingw32 port
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of GCC (same as cygwin in no-cygwin mode).
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"""
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# problems:
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#
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# * if you use a msvc compiled python version (1.5.2)
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# 1. you have to insert a __GNUC__ section in its config.h
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# 2. you have to generate a import library for its dll
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# - create a def-file for python??.dll
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# - create a import library using
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# dlltool --dllname python15.dll --def python15.def \
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# --output-lib libpython15.a
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#
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# see also http://starship.python.net/crew/kernr/mingw32/Notes.html
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#
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# * We put export_symbols in a def-file, and don't use
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# --export-all-symbols because it doesn't worked reliable in some
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# tested configurations. And because other windows compilers also
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# need their symbols specified this no serious problem.
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#
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# tested configurations:
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#
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# * cygwin gcc 2.91.57/ld 2.9.4/dllwrap 0.2.4 works
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# (after patching python's config.h and for C++ some other include files)
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# see also http://starship.python.net/crew/kernr/mingw32/Notes.html
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# * mingw32 gcc 2.95.2/ld 2.9.4/dllwrap 0.2.4 works
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# (ld doesn't support -shared, so we use dllwrap)
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# * cygwin gcc 2.95.2/ld 2.10.90/dllwrap 2.10.90 works now
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# - its dllwrap doesn't work, there is a bug in binutils 2.10.90
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# see also http://sources.redhat.com/ml/cygwin/2000-06/msg01274.html
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# - using gcc -mdll instead dllwrap doesn't work without -static because
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# it tries to link against dlls instead their import libraries. (If
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# it finds the dll first.)
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# By specifying -static we force ld to link against the import libraries,
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# this is windows standard and there are normally not the necessary symbols
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# in the dlls.
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# *** only the version of June 2000 shows these problems
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# * cygwin gcc 3.2/ld 2.13.90 works
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# (ld supports -shared)
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# * mingw gcc 3.2/ld 2.13 works
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# (ld supports -shared)
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import os
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import sys
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from packaging import logger
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from packaging.compiler.unixccompiler import UnixCCompiler
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from packaging.util import write_file
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from packaging.errors import PackagingExecError, CompileError, UnknownFileError
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from packaging.util import get_compiler_versions
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import sysconfig
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# TODO use platform instead of sys.version
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# (platform does unholy sys.version parsing too, but at least it gives other
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# VMs a chance to override the returned values)
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def get_msvcr():
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"""Include the appropriate MSVC runtime library if Python was built
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with MSVC 7.0 or later.
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"""
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msc_pos = sys.version.find('MSC v.')
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if msc_pos != -1:
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msc_ver = sys.version[msc_pos+6:msc_pos+10]
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if msc_ver == '1300':
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# MSVC 7.0
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return ['msvcr70']
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elif msc_ver == '1310':
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# MSVC 7.1
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return ['msvcr71']
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elif msc_ver == '1400':
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# VS2005 / MSVC 8.0
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return ['msvcr80']
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elif msc_ver == '1500':
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# VS2008 / MSVC 9.0
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return ['msvcr90']
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else:
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raise ValueError("Unknown MS Compiler version %s " % msc_ver)
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class CygwinCCompiler(UnixCCompiler):
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""" Handles the Cygwin port of the GNU C compiler to Windows.
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"""
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name = 'cygwin'
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description = 'Cygwin port of GNU C Compiler for Win32'
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obj_extension = ".o"
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static_lib_extension = ".a"
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shared_lib_extension = ".dll"
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static_lib_format = "lib%s%s"
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shared_lib_format = "%s%s"
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exe_extension = ".exe"
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def __init__(self, dry_run=False, force=False):
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super(CygwinCCompiler, self).__init__(dry_run, force)
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status, details = check_config_h()
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logger.debug("Python's GCC status: %s (details: %s)", status, details)
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if status is not CONFIG_H_OK:
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self.warn(
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"Python's pyconfig.h doesn't seem to support your compiler. "
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"Reason: %s. "
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"Compiling may fail because of undefined preprocessor macros."
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% details)
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self.gcc_version, self.ld_version, self.dllwrap_version = \
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get_compiler_versions()
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logger.debug(self.name + ": gcc %s, ld %s, dllwrap %s\n",
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self.gcc_version,
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self.ld_version,
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self.dllwrap_version)
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# ld_version >= "2.10.90" and < "2.13" should also be able to use
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# gcc -mdll instead of dllwrap
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# Older dllwraps had own version numbers, newer ones use the
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# same as the rest of binutils ( also ld )
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# dllwrap 2.10.90 is buggy
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if self.ld_version >= "2.10.90":
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self.linker_dll = "gcc"
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else:
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self.linker_dll = "dllwrap"
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# ld_version >= "2.13" support -shared so use it instead of
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# -mdll -static
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if self.ld_version >= "2.13":
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shared_option = "-shared"
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else:
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shared_option = "-mdll -static"
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# Hard-code GCC because that's what this is all about.
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# XXX optimization, warnings etc. should be customizable.
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self.set_executables(compiler='gcc -mcygwin -O -Wall',
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compiler_so='gcc -mcygwin -mdll -O -Wall',
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compiler_cxx='g++ -mcygwin -O -Wall',
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linker_exe='gcc -mcygwin',
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linker_so=('%s -mcygwin %s' %
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(self.linker_dll, shared_option)))
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# cygwin and mingw32 need different sets of libraries
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if self.gcc_version == "2.91.57":
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# cygwin shouldn't need msvcrt, but without the dlls will crash
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# (gcc version 2.91.57) -- perhaps something about initialization
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self.dll_libraries=["msvcrt"]
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self.warn(
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"Consider upgrading to a newer version of gcc")
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else:
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# Include the appropriate MSVC runtime library if Python was built
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# with MSVC 7.0 or later.
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self.dll_libraries = get_msvcr()
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def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
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"""Compile the source by spawning GCC and windres if needed."""
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if ext == '.rc' or ext == '.res':
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# gcc needs '.res' and '.rc' compiled to object files !!!
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try:
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self.spawn(["windres", "-i", src, "-o", obj])
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except PackagingExecError as msg:
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raise CompileError(msg)
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else: # for other files use the C-compiler
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try:
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self.spawn(self.compiler_so + cc_args + [src, '-o', obj] +
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extra_postargs)
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except PackagingExecError as msg:
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raise CompileError(msg)
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def link(self, target_desc, objects, output_filename, output_dir=None,
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libraries=None, library_dirs=None, runtime_library_dirs=None,
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export_symbols=None, debug=False, extra_preargs=None,
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extra_postargs=None, build_temp=None, target_lang=None):
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"""Link the objects."""
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# use separate copies, so we can modify the lists
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extra_preargs = list(extra_preargs or [])
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libraries = list(libraries or [])
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objects = list(objects or [])
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# Additional libraries
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libraries.extend(self.dll_libraries)
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# handle export symbols by creating a def-file
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# with executables this only works with gcc/ld as linker
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if ((export_symbols is not None) and
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(target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):
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# (The linker doesn't do anything if output is up-to-date.
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# So it would probably better to check if we really need this,
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# but for this we had to insert some unchanged parts of
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# UnixCCompiler, and this is not what we want.)
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# we want to put some files in the same directory as the
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# object files are, build_temp doesn't help much
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# where are the object files
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temp_dir = os.path.dirname(objects[0])
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# name of dll to give the helper files the same base name
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dll_name, dll_extension = os.path.splitext(
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os.path.basename(output_filename))
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# generate the filenames for these files
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def_file = os.path.join(temp_dir, dll_name + ".def")
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lib_file = os.path.join(temp_dir, 'lib' + dll_name + ".a")
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# Generate .def file
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contents = [
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"LIBRARY %s" % os.path.basename(output_filename),
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"EXPORTS"]
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for sym in export_symbols:
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contents.append(sym)
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self.execute(write_file, (def_file, contents),
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"writing %s" % def_file)
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# next add options for def-file and to creating import libraries
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# dllwrap uses different options than gcc/ld
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if self.linker_dll == "dllwrap":
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extra_preargs.extend(("--output-lib", lib_file))
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# for dllwrap we have to use a special option
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extra_preargs.extend(("--def", def_file))
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# we use gcc/ld here and can be sure ld is >= 2.9.10
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else:
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# doesn't work: bfd_close build\...\libfoo.a: Invalid operation
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#extra_preargs.extend(("-Wl,--out-implib,%s" % lib_file))
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# for gcc/ld the def-file is specified as any object files
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objects.append(def_file)
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#end: if ((export_symbols is not None) and
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# (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):
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# who wants symbols and a many times larger output file
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# should explicitly switch the debug mode on
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# otherwise we let dllwrap/ld strip the output file
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# (On my machine: 10KB < stripped_file < ??100KB
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# unstripped_file = stripped_file + XXX KB
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# ( XXX=254 for a typical python extension))
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if not debug:
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extra_preargs.append("-s")
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super(CygwinCCompiler, self).link(
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target_desc, objects, output_filename, output_dir, libraries,
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library_dirs, runtime_library_dirs,
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None, # export_symbols, we do this in our def-file
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debug, extra_preargs, extra_postargs, build_temp, target_lang)
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# -- Miscellaneous methods -----------------------------------------
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def object_filenames(self, source_filenames, strip_dir=False,
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output_dir=''):
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"""Adds supports for rc and res files."""
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if output_dir is None:
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output_dir = ''
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obj_names = []
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for src_name in source_filenames:
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# use normcase to make sure '.rc' is really '.rc' and not '.RC'
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base, ext = os.path.splitext(os.path.normcase(src_name))
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if ext not in (self.src_extensions + ['.rc','.res']):
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raise UnknownFileError("unknown file type '%s' (from '%s')" % (ext, src_name))
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if strip_dir:
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base = os.path.basename(base)
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if ext in ('.res', '.rc'):
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# these need to be compiled to object files
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obj_names.append(os.path.join(output_dir,
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base + ext + self.obj_extension))
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else:
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obj_names.append(os.path.join(output_dir,
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base + self.obj_extension))
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return obj_names
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# the same as cygwin plus some additional parameters
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class Mingw32CCompiler(CygwinCCompiler):
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""" Handles the Mingw32 port of the GNU C compiler to Windows.
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"""
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name = 'mingw32'
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description = 'MinGW32 compiler'
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def __init__(self, dry_run=False, force=False):
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super(Mingw32CCompiler, self).__init__(dry_run, force)
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# ld_version >= "2.13" support -shared so use it instead of
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# -mdll -static
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if self.ld_version >= "2.13":
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shared_option = "-shared"
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else:
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shared_option = "-mdll -static"
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# A real mingw32 doesn't need to specify a different entry point,
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# but cygwin 2.91.57 in no-cygwin-mode needs it.
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if self.gcc_version <= "2.91.57":
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entry_point = '--entry _DllMain@12'
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else:
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entry_point = ''
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self.set_executables(compiler='gcc -mno-cygwin -O -Wall',
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compiler_so='gcc -mno-cygwin -mdll -O -Wall',
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compiler_cxx='g++ -mno-cygwin -O -Wall',
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linker_exe='gcc -mno-cygwin',
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linker_so='%s -mno-cygwin %s %s'
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% (self.linker_dll, shared_option,
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entry_point))
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# Maybe we should also append -mthreads, but then the finished
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# dlls need another dll (mingwm10.dll see Mingw32 docs)
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# (-mthreads: Support thread-safe exception handling on `Mingw32')
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# no additional libraries needed
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self.dll_libraries=[]
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# Include the appropriate MSVC runtime library if Python was built
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# with MSVC 7.0 or later.
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self.dll_libraries = get_msvcr()
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# Because these compilers aren't configured in Python's pyconfig.h file by
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# default, we should at least warn the user if he is using a unmodified
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# version.
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CONFIG_H_OK = "ok"
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CONFIG_H_NOTOK = "not ok"
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CONFIG_H_UNCERTAIN = "uncertain"
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def check_config_h():
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"""Check if the current Python installation appears amenable to building
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extensions with GCC.
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Returns a tuple (status, details), where 'status' is one of the following
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constants:
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- CONFIG_H_OK: all is well, go ahead and compile
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- CONFIG_H_NOTOK: doesn't look good
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- CONFIG_H_UNCERTAIN: not sure -- unable to read pyconfig.h
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'details' is a human-readable string explaining the situation.
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Note there are two ways to conclude "OK": either 'sys.version' contains
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the string "GCC" (implying that this Python was built with GCC), or the
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installed "pyconfig.h" contains the string "__GNUC__".
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"""
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# XXX since this function also checks sys.version, it's not strictly a
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# "pyconfig.h" check -- should probably be renamed...
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# if sys.version contains GCC then python was compiled with GCC, and the
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# pyconfig.h file should be OK
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if "GCC" in sys.version:
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return CONFIG_H_OK, "sys.version mentions 'GCC'"
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# let's see if __GNUC__ is mentioned in python.h
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fn = sysconfig.get_config_h_filename()
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try:
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with open(fn) as config_h:
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if "__GNUC__" in config_h.read():
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return CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn
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else:
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return CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn
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except IOError as exc:
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return (CONFIG_H_UNCERTAIN,
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"couldn't read '%s': %s" % (fn, exc.strerror))
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