320 lines
12 KiB
Python
320 lines
12 KiB
Python
"""distutils.emxccompiler
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Provides the EMXCCompiler class, a subclass of UnixCCompiler that
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handles the EMX port of the GNU C compiler to OS/2.
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"""
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# issues:
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#
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# * OS/2 insists that DLLs can have names no longer than 8 characters
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# We put export_symbols in a def-file, as though the DLL can have
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# an arbitrary length name, but truncate the output filename.
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#
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# * only use OMF objects and use LINK386 as the linker (-Zomf)
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#
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# * always build for multithreading (-Zmt) as the accompanying OS/2 port
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# of Python is only distributed with threads enabled.
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#
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# tested configurations:
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#
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# * EMX gcc 2.81/EMX 0.9d fix03
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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 EMXCCompiler (UnixCCompiler):
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compiler_type = 'emx'
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obj_extension = ".obj"
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static_lib_extension = ".lib"
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shared_lib_extension = ".dll"
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static_lib_format = "%s%s"
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shared_lib_format = "%s%s"
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res_extension = ".res" # compiled resource file
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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 pyconfig.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) = \
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get_versions()
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self.debug_print(self.compiler_type + ": gcc %s, ld %s\n" %
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(self.gcc_version,
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self.ld_version) )
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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 -Zomf -Zmt -O3 -fomit-frame-pointer -mprobe -Wall',
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compiler_so='gcc -Zomf -Zmt -O3 -fomit-frame-pointer -mprobe -Wall',
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linker_exe='gcc -Zomf -Zmt -Zcrtdll',
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linker_so='gcc -Zomf -Zmt -Zcrtdll -Zdll')
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# want the gcc library statically linked (so that we don't have
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# to distribute a version dependent on the compiler we have)
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self.dll_libraries=["gcc"]
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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':
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# gcc requires '.rc' compiled to binary ('.res') files !!!
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try:
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self.spawn(["rc", "-r", src])
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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)):
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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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# Generate .def file
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contents = [
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"LIBRARY %s INITINSTANCE TERMINSTANCE" % \
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os.path.splitext(os.path.basename(output_filename))[0],
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"DATA MULTIPLE NONSHARED",
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"EXPORTS"]
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for sym in export_symbols:
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contents.append(' "%s"' % 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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# 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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target_lang)
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# link ()
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# -- Miscellaneous methods -----------------------------------------
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# override the object_filenames method from CCompiler to
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# 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']):
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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 == '.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 + self.res_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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# override the find_library_file method from UnixCCompiler
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# to deal with file naming/searching differences
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def find_library_file(self, dirs, lib, debug=0):
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shortlib = '%s.lib' % lib
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longlib = 'lib%s.lib' % lib # this form very rare
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# get EMX's default library directory search path
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try:
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emx_dirs = os.environ['LIBRARY_PATH'].split(';')
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except KeyError:
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emx_dirs = []
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for dir in dirs + emx_dirs:
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shortlibp = os.path.join(dir, shortlib)
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longlibp = os.path.join(dir, longlib)
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if os.path.exists(shortlibp):
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return shortlibp
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elif os.path.exists(longlibp):
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return longlibp
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# Oops, didn't find it in *any* of 'dirs'
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return None
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# class EMXCCompiler
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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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try:
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s = f.read()
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finally:
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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 and ld.
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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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try:
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out_string = out.read()
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finally:
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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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# EMX ld has no way of reporting version number, and we use GCC
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# anyway - so we can link OMF DLLs
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ld_version = None
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return (gcc_version, ld_version)
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