298 lines
11 KiB
Python
298 lines
11 KiB
Python
"""distutils.unixccompiler
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Contains the UnixCCompiler class, a subclass of CCompiler that handles
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the "typical" Unix-style command-line C compiler:
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* macros defined with -Dname[=value]
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* macros undefined with -Uname
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* include search directories specified with -Idir
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* libraries specified with -lllib
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* library search directories specified with -Ldir
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* compile handled by 'cc' (or similar) executable with -c option:
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compiles .c to .o
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* link static library handled by 'ar' command (possibly with 'ranlib')
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* link shared library handled by 'cc -shared'
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"""
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# created 1999/07/05, Greg Ward
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__revision__ = "$Id$"
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import string, re, os
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from types import *
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from copy import copy
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from distutils.sysconfig import \
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CC, CCSHARED, CFLAGS, OPT, LDSHARED, LDFLAGS, RANLIB, AR, SO
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from distutils.ccompiler import CCompiler, gen_preprocess_options, gen_lib_options
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# XXX Things not currently handled:
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# * optimization/debug/warning flags; we just use whatever's in Python's
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# Makefile and live with it. Is this adequate? If not, we might
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# have to have a bunch of subclasses GNUCCompiler, SGICCompiler,
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# SunCCompiler, and I suspect down that road lies madness.
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# * even if we don't know a warning flag from an optimization flag,
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# we need some way for outsiders to feed preprocessor/compiler/linker
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# flags in to us -- eg. a sysadmin might want to mandate certain flags
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# via a site config file, or a user might want to set something for
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# compiling this module distribution only via the setup.py command
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# line, whatever. As long as these options come from something on the
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# current system, they can be as system-dependent as they like, and we
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# should just happily stuff them into the preprocessor/compiler/linker
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# options and carry on.
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class UnixCCompiler (CCompiler):
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# XXX perhaps there should really be *three* kinds of include
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# directories: those built in to the preprocessor, those from Python's
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# Makefiles, and those supplied to {add,set}_include_dirs(). Currently
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# we make no distinction between the latter two at this point; it's all
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# up to the client class to select the include directories to use above
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# and beyond the compiler's defaults. That is, both the Python include
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# directories and any module- or package-specific include directories
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# are specified via {add,set}_include_dirs(), and there's no way to
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# distinguish them. This might be a bug.
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compiler_type = 'unix'
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# Needed for the filename generation methods provided by the
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# base class, CCompiler.
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src_extensions = [".c",".C",".cc",".cxx",".cpp"]
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obj_extension = ".o"
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static_lib_extension = ".a"
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shared_lib_extension = ".so"
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static_lib_format = shared_lib_format = "lib%s%s"
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# Command to create a static library: seems to be pretty consistent
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# across the major Unices. Might have to move down into the
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# constructor if we need platform-specific guesswork.
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archiver = "ar"
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archiver_options = "-cr"
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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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CCompiler.__init__ (self, verbose, dry_run, force)
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self.preprocess_options = None
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self.compile_options = None
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# Munge CC and OPT together in case there are flags stuck in CC.
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# Note that using these variables from sysconfig immediately makes
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# this module specific to building Python extensions and
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# inappropriate as a general-purpose C compiler front-end. So sue
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# me. Note also that we use OPT rather than CFLAGS, because CFLAGS
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# is the flags used to compile Python itself -- not only are there
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# -I options in there, they are the *wrong* -I options. We'll
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# leave selection of include directories up to the class using
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# UnixCCompiler!
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(self.cc, self.ccflags) = \
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_split_command (CC + ' ' + OPT)
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self.ccflags_shared = string.split (CCSHARED)
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(self.ld_shared, self.ldflags_shared) = \
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_split_command (LDSHARED)
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self.ld_exec = self.cc
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# __init__ ()
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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 = ['-c'] + pp_opts + self.ccflags + self.ccflags_shared
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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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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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self.spawn ([self.cc] + cc_args + [src, '-o', obj] + extra_postargs)
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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_static_lib (self,
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objects,
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output_libname,
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output_dir=None,
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debug=0):
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(objects, output_dir) = self._fix_link_args (objects, output_dir, takes_libs=0)
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output_filename = \
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self.library_filename (output_libname, output_dir=output_dir)
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if self._need_link (objects, output_filename):
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self.mkpath (os.path.dirname (output_filename))
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self.spawn ([self.archiver,
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self.archiver_options,
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output_filename] +
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objects + self.objects)
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else:
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self.announce ("skipping %s (up-to-date)" % output_filename)
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# link_static_lib ()
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def link_shared_lib (self,
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objects,
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output_libname,
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output_dir=None,
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libraries=None,
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library_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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self.link_shared_object (
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objects,
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self.shared_library_filename (output_libname),
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output_dir,
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libraries,
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library_dirs,
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debug,
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extra_preargs,
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extra_postargs)
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def link_shared_object (self,
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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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debug=0,
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extra_preargs=None,
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extra_postargs=None):
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(objects, output_dir, libraries, library_dirs) = \
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self._fix_link_args (objects, output_dir, takes_libs=1,
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libraries=libraries, library_dirs=library_dirs)
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lib_opts = gen_lib_options (self, library_dirs, libraries)
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if type (output_dir) not in (StringType, NoneType):
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raise TypeError, "'output_dir' must be a string or None"
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if output_dir is not None:
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output_filename = os.path.join (output_dir, output_filename)
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if self._need_link (objects, output_filename):
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ld_args = (self.ldflags_shared + objects + self.objects +
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lib_opts + ['-o', output_filename])
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if debug:
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ld_args[:0] = ['-g']
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if extra_preargs:
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ld_args[:0] = extra_preargs
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if extra_postargs:
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ld_args.extend (extra_postargs)
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self.mkpath (os.path.dirname (output_filename))
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self.spawn ([self.ld_shared] + ld_args)
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else:
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self.announce ("skipping %s (up-to-date)" % output_filename)
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# link_shared_object ()
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def link_executable (self,
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objects,
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output_progname,
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output_dir=None,
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libraries=None,
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library_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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(objects, output_dir, libraries, library_dirs) = \
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self._fix_link_args (objects, output_dir, takes_libs=1,
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libraries=libraries, library_dirs=library_dirs)
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lib_opts = gen_lib_options (self, library_dirs, libraries)
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output_filename = output_progname # Unix-ism!
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if output_dir is not None:
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output_filename = os.path.join (output_dir, output_filename)
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if self._need_link (objects, output_filename):
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ld_args = objects + self.objects + lib_opts + ['-o', output_filename]
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if debug:
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ld_args[:0] = ['-g']
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if extra_preargs:
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ld_args[:0] = extra_preargs
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if extra_postargs:
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ld_args.extend (extra_postargs)
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self.mkpath (os.path.dirname (output_filename))
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self.spawn ([self.ld_exec] + ld_args)
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else:
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self.announce ("skipping %s (up-to-date)" % output_filename)
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# link_executable ()
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# -- Miscellaneous methods -----------------------------------------
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# These are all used by the 'gen_lib_options() function, in
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# ccompiler.py.
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def library_dir_option (self, dir):
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return "-L" + dir
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def library_option (self, lib):
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return "-l" + lib
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def find_library_file (self, dirs, lib):
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for dir in dirs:
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shared = os.path.join (dir, self.shared_library_filename (lib))
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static = os.path.join (dir, self.library_filename (lib))
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# We're second-guessing the linker here, with not much hard
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# data to go on: GCC seems to prefer the shared library, so I'm
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# assuming that *all* Unix C compilers do. And of course I'm
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# ignoring even GCC's "-static" option. So sue me.
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if os.path.exists (shared):
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return shared
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elif os.path.exists (static):
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return static
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else:
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# Oops, didn't find it in *any* of 'dirs'
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return None
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# find_library_file ()
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# class UnixCCompiler
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def _split_command (cmd):
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"""Split a command string up into the progam to run (a string) and
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the list of arguments; return them as (cmd, arglist)."""
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args = string.split (cmd)
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return (args[0], args[1:])
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