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The cygwinccompiler.get_versions() function only handles versions numbers of the form "x.y.z". The attached patch enhances get_versions() to handle "x.y" too (i.e., the ".z" is optional). This change causes the unnecessary "--entry _DllMain@12" link option to be suppressed for recent Cygwin and Mingw toolchains. Additionally, it directs recent Mingw toolchains to use gcc instead of dllwrap during linking.
391 lines
15 KiB
Python
391 lines
15 KiB
Python
"""distutils.cygwinccompiler
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Provides the CygwinCCompiler class, a subclass of UnixCCompiler that
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handles the Cygwin port of the GNU C compiler to Windows. It also contains
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the Mingw32CCompiler class which handles the mingw32 port of GCC (same as
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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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# *** only the version of June 2000 shows these problems
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# This module should be kept compatible with Python 1.5.2.
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__revision__ = "$Id$"
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import os,sys,copy
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from distutils.ccompiler import gen_preprocess_options, gen_lib_options
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from distutils.unixccompiler import UnixCCompiler
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from distutils.file_util import write_file
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from distutils.errors import DistutilsExecError, CompileError, UnknownFileError
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from distutils import log
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class CygwinCCompiler (UnixCCompiler):
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compiler_type = 'cygwin'
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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, verbose=0, dry_run=0, force=0):
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UnixCCompiler.__init__ (self, verbose, dry_run, force)
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(status, details) = check_config_h()
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self.debug_print("Python's GCC status: %s (details: %s)" %
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(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_versions()
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self.debug_print(self.compiler_type + ": 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" 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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# 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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linker_exe='gcc -mcygwin',
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linker_so=('%s -mcygwin -mdll' %
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self.linker_dll))
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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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self.dll_libraries=[]
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# __init__ ()
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def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
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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 DistutilsExecError, 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 DistutilsExecError, msg:
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raise CompileError, msg
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def link (self,
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target_desc,
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objects,
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output_filename,
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output_dir=None,
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libraries=None,
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library_dirs=None,
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runtime_library_dirs=None,
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export_symbols=None,
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debug=0,
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extra_preargs=None,
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extra_postargs=None,
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build_temp=None,
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target_lang=None):
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# use separate copies, so we can modify the lists
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extra_preargs = copy.copy(extra_preargs or [])
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libraries = copy.copy(libraries or [])
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objects = copy.copy(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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UnixCCompiler.link(self,
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target_desc,
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objects,
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output_filename,
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output_dir,
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libraries,
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library_dirs,
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runtime_library_dirs,
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None, # export_symbols, we do this in our def-file
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debug,
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extra_preargs,
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extra_postargs,
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build_temp,
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target_lang)
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# link ()
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# -- Miscellaneous methods -----------------------------------------
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# overwrite the one from CCompiler to support rc and res-files
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def object_filenames (self,
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source_filenames,
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strip_dir=0,
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output_dir=''):
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if output_dir is None: 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, \
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"unknown file type '%s' (from '%s')" % \
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(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 == '.res' or ext == '.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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# object_filenames ()
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# class CygwinCCompiler
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# the same as cygwin plus some additional parameters
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class Mingw32CCompiler (CygwinCCompiler):
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compiler_type = 'mingw32'
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def __init__ (self,
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verbose=0,
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dry_run=0,
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force=0):
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CygwinCCompiler.__init__ (self, verbose, dry_run, force)
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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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linker_exe='gcc -mno-cygwin',
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linker_so='%s -mno-cygwin -mdll %s'
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% (self.linker_dll, 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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# __init__ ()
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# class Mingw32CCompiler
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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 (specifically, pyconfig.h)
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appears amenable to building extensions with GCC. Returns a tuple
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(status, details), where 'status' is one of the following constants:
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CONFIG_H_OK
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all is well, go ahead and compile
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CONFIG_H_NOTOK
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doesn't look good
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CONFIG_H_UNCERTAIN
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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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from distutils import sysconfig
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import string
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# if sys.version contains GCC then python was compiled with
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# GCC, and the pyconfig.h file should be OK
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if string.find(sys.version,"GCC") >= 0:
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return (CONFIG_H_OK, "sys.version mentions 'GCC'")
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fn = sysconfig.get_config_h_filename()
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try:
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# It would probably better to read single lines to search.
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# But we do this only once, and it is fast enough
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f = open(fn)
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s = f.read()
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f.close()
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except IOError, exc:
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# if we can't read this file, we cannot say it is wrong
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# the compiler will complain later about this file as missing
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return (CONFIG_H_UNCERTAIN,
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"couldn't read '%s': %s" % (fn, exc.strerror))
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else:
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# "pyconfig.h" contains an "#ifdef __GNUC__" or something similar
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if string.find(s,"__GNUC__") >= 0:
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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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def get_versions():
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""" Try to find out the versions of gcc, ld and dllwrap.
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If not possible it returns None for it.
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"""
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from distutils.version import StrictVersion
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from distutils.spawn import find_executable
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import re
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gcc_exe = find_executable('gcc')
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if gcc_exe:
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out = os.popen(gcc_exe + ' -dumpversion','r')
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out_string = out.read()
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out.close()
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result = re.search('(\d+\.\d+(\.\d+)*)',out_string)
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if result:
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gcc_version = StrictVersion(result.group(1))
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else:
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gcc_version = None
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else:
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gcc_version = None
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ld_exe = find_executable('ld')
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if ld_exe:
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out = os.popen(ld_exe + ' -v','r')
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out_string = out.read()
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out.close()
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result = re.search('(\d+\.\d+(\.\d+)*)',out_string)
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if result:
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ld_version = StrictVersion(result.group(1))
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else:
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ld_version = None
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else:
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ld_version = None
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dllwrap_exe = find_executable('dllwrap')
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if dllwrap_exe:
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out = os.popen(dllwrap_exe + ' --version','r')
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out_string = out.read()
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out.close()
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result = re.search(' (\d+\.\d+(\.\d+)*)',out_string)
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if result:
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dllwrap_version = StrictVersion(result.group(1))
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else:
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dllwrap_version = None
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else:
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dllwrap_version = None
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return (gcc_version, ld_version, dllwrap_version)
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