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255 lines
9.9 KiB
Python
255 lines
9.9 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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__rcsid__ = "$Id$"
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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 sysconfig import \
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CC, CCSHARED, CFLAGS, OPT, LDSHARED, LDFLAGS, RANLIB, AR, SO
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from ccompiler import CCompiler, gen_preprocess_options, gen_lib_options
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from util import move_file, newer_pairwise, newer_group
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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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_obj_ext = '.o'
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_exe_ext = ''
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_shared_lib_ext = SO
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_static_lib_ext = '.a'
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def __init__ (self,
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verbose=0,
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dry_run=0):
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CCompiler.__init__ (self, verbose, dry_run)
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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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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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includes=None):
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if output_dir is None:
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output_dir = self.output_dir
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if macros is None:
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macros = []
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if includes is None:
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includes = []
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if type (macros) is not ListType:
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raise TypeError, \
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"'macros' (if supplied) must be a list of tuples"
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if type (includes) is not ListType:
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raise TypeError, \
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"'includes' (if supplied) must be a list of strings"
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pp_opts = gen_preprocess_options (self.macros + macros,
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self.include_dirs + includes)
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# So we can mangle 'sources' without hurting the caller's data
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orig_sources = sources
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sources = copy (sources)
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# Get the list of expected output (object) files and drop files we
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# don't have to recompile. (Simplistic check -- we just compare the
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# source and object file, no deep dependency checking involving
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# header files. Hmmm.)
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objects = self.object_filenames (sources, output_dir)
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skipped = newer_pairwise (sources, objects)
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for skipped_pair in skipped:
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self.announce ("skipping %s (%s up-to-date)" % skipped_pair)
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# If anything left to compile, compile it
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if sources:
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# XXX use of ccflags_shared means we're blithely assuming
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# that we're compiling for inclusion in a shared object!
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# (will have to fix this when I add the ability to build a
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# new Python)
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cc_args = ['-c'] + pp_opts + \
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self.ccflags + self.ccflags_shared + \
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sources
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self.spawn ([self.cc] + cc_args)
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# Note that compiling multiple source files in the same go like
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# we've just done drops the .o file in the current directory, which
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# may not be what the caller wants (depending on the 'output_dir'
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# parameter). So, if necessary, fix that now by moving the .o
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# files into the desired output directory. (The alternative, of
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# course, is to compile one-at-a-time with a -o option. 6 of one,
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# 12/2 of the other...)
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if output_dir:
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for i in range (len (objects)):
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src = os.path.basename (objects[i])
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objects[i] = self.move_file (src, output_dir)
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# Have to re-fetch list of object filenames, because we want to
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# return *all* of them, including those that weren't recompiled on
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# this call!
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return self.object_filenames (orig_sources, output_dir)
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# XXX punting on 'link_static_lib()' for now -- it might be better for
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# CCompiler to mandate just 'link_binary()' or some such to build a new
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# Python binary; it would then take care of linking in everything
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# needed for the new Python without messing with an intermediate static
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# library.
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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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build_info=None):
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# XXX should we sanity check the library name? (eg. no
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# slashes)
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self.link_shared_object (
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objects,
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"lib%s%s" % (output_libname, self._shared_lib_ext),
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output_dir,
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libraries,
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library_dirs,
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build_info)
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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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build_info=None):
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if output_dir is None:
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output_dir = self.output_dir
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if libraries is None:
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libraries = []
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if library_dirs is None:
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library_dirs = []
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if build_info is None:
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build_info = {}
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lib_opts = gen_lib_options (self.libraries + libraries,
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self.library_dirs + library_dirs,
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"-l%s", "-L%s")
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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 any of the input object files are newer than the output shared
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# object, relink. Again, this is a simplistic dependency check:
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# doesn't look at any of the libraries we might be linking with.
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# Note that we have to dance around errors comparing timestamps if
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# we're in dry-run mode (yuck).
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try:
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newer = newer_group (objects, output_filename)
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except OSError:
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if self.dry_run:
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newer = 1
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else:
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raise
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if newer:
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ld_args = self.ldflags_shared + lib_opts + \
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objects + ['-o', 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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def object_filenames (self, source_filenames, output_dir=None):
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outnames = []
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for inname in source_filenames:
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outname = re.sub (r'\.(c|C|cc|cxx|cpp)$', self._obj_ext, inname)
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outname = os.path.basename (outname)
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if output_dir is not None:
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outname = os.path.join (output_dir, outname)
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outnames.append (outname)
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return outnames
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def shared_object_filename (self, source_filename, output_dir=None):
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outname = re.sub (r'\.(c|C|cc|cxx|cpp)$', self._shared_lib_ext)
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outname = os.path.basename (outname)
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if output_dir is not None:
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outname = os.path.join (output_dir, outname)
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return outname
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def library_filename (self, libname):
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return "lib%s%s" % (libname, self._static_lib_ext )
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def shared_library_filename (self, libname):
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return "lib%s%s" % (libname, self._shared_lib_ext )
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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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