443 lines
17 KiB
Python
443 lines
17 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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# - 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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# created 2000/05/05, Rene Liebscher
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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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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,
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verbose=0,
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dry_run=0,
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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 config.h doesn't seem to support your compiler. " +
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("Reason: %s." % details) +
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"Compiling may fail because of undefined preprocessor macros.")
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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 -static' %
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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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# not much different of the compile method in UnixCCompiler,
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# but we have to insert some lines in the middle of it, so
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# we put here a adapted version of it.
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# (If we would call compile() in the base class, it would do some
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# initializations a second time, this is why all is done here.)
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def compile (self,
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sources,
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output_dir=None,
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macros=None,
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include_dirs=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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(output_dir, macros, include_dirs) = \
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self._fix_compile_args (output_dir, macros, include_dirs)
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(objects, skip_sources) = self._prep_compile (sources, output_dir)
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# Figure out the options for the compiler command line.
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pp_opts = gen_preprocess_options (macros, include_dirs)
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cc_args = pp_opts + ['-c']
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if debug:
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cc_args[:0] = ['-g']
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if extra_preargs:
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cc_args[:0] = extra_preargs
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if extra_postargs is None:
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extra_postargs = []
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# Compile all source files that weren't eliminated by
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# '_prep_compile()'.
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for i in range (len (sources)):
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src = sources[i] ; obj = objects[i]
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ext = (os.path.splitext (src))[1]
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if skip_sources[src]:
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self.announce ("skipping %s (%s up-to-date)" % (src, obj))
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else:
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self.mkpath (os.path.dirname (obj))
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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 +
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[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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# Return *all* object filenames, not just the ones we just built.
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return objects
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# compile ()
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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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# 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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exp_file = os.path.join(temp_dir, dll_name + ".exp")
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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-exp",exp_file,
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"--output-lib",lib_file,
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])
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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 other 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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# 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 -static %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 config.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, config.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 config.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 "config.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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# "config.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 config.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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# "config.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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