193 lines
7.2 KiB
Python
193 lines
7.2 KiB
Python
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"""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
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from types import *
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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
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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 any -I and -D options that we get from Makefile (via sysconfig)
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# are preserved, but not treated specially: that is, they are not put
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# in the self.include_dirs and self.macros, etc. lists that we inherit
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# from CCompiler. I'm not sure if this is right, wrong or indifferent,
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# but it should probably be a documented part of the CCompiler API:
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# ie. there are *three* kinds of include directories, those from the
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# compiler, those from Python's Makefiles, and those supplied to
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# {add,set}_include_dirs() -- and 'set_include_dirs()' only overrides
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# the last kind! I suspect the same applies to libraries and library
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# directories -- anything else?
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def __init__ (self):
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CCompiler.__init__ (self)
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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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(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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macros=[],
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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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# use of ccflags_shared means we're blithely assuming that we're
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# compiling for inclusion in a shared object! (will have to fix
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# this when I add the ability to build a 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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# this will change to 'spawn' when I have it!
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print string.join ([self.cc] + cc_args, ' ')
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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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libraries=None,
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library_dirs=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 (objects, "lib%s%s" % (output_libname, SO))
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def link_shared_object (self,
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objects,
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output_filename,
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libraries=[],
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library_dirs=[]):
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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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ld_args = self.ldflags_shared + lib_opts + \
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objects + ['-o', output_filename]
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print string.join ([self.ld_shared] + ld_args, ' ')
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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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def _gen_preprocess_options (macros, includes):
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# XXX it would be nice (mainly aesthetic, and so we don't generate
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# stupid-looking command lines) to go over 'macros' and eliminate
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# redundant definitions/undefinitions (ie. ensure that only the
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# latest mention of a particular macro winds up on the command
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# line). I don't think it's essential, though, since most (all?)
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# Unix C compilers only pay attention to the latest -D or -U
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# mention of a macro on their command line. Similar situation for
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# 'includes'. I'm punting on both for now. Anyways, weeding out
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# redundancies like this should probably be the province of
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# CCompiler, since the data structures used are inherited from it
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# and therefore common to all CCompiler classes.
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pp_opts = []
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for macro in macros:
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if len (macro) == 1: # undefine this macro
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pp_opts.append ("-U%s" % macro[0])
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elif len (macro) == 2:
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if macro[1] is None: # define with no explicit value
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pp_opts.append ("-D%s" % macro[0])
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else:
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# XXX *don't* need to be clever about quoting the
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# macro value here, because we're going to avoid the
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# shell at all costs when we spawn the command!
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pp_opts.append ("-D%s=%s" % macro)
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for dir in includes:
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pp_opts.append ("-I%s" % dir)
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return pp_opts
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# _gen_preprocess_options ()
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def _gen_lib_options (libraries, library_dirs):
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lib_opts = []
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for dir in library_dirs:
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lib_opts.append ("-L%s" % dir)
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# XXX it's important that we *not* remove redundant library mentions!
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# sometimes you really do have to say "-lfoo -lbar -lfoo" in order to
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# resolve all symbols. I just hope we never have to say "-lfoo obj.o
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# -lbar" to get things to work -- that's certainly a possibility, but a
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# pretty nasty way to arrange your C code.
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for lib in libraries:
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lib_opts.append ("-l%s" % lib)
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return lib_opts
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# _gen_lib_options ()
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