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Latest version from Rene Liebscher; major changes:

Browse source 
- added big comment describing possible problems
  - look for and react to versions of gcc, ld, and dlltool; mainly
    this is done by the 'get_versions()' function and the CygwinCCompiler
    and Mingw32CCompiler constructors
  - move 'check_config_h()' to end of file and defer calling it until
    we need to (ie. in the CygwinCCompiler constructor)
  - lots of changes in 'link_shared_object()' -- mostly seems to be
    library and DLL stuff, but I don't follow it entirely
This commit is contained in:
Greg Ward 2000-08-02 01:31:56 +00:00
parent 1d526dd3b3
commit bf5c70973f
1 changed files with 233 additions and 110 deletions
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323
Lib/distutils/cygwinccompiler.py
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@ -6,53 +6,54 @@ the Mingw32CCompiler class which handles the mingw32 port of GCC (same as
cygwin in no-cygwin mode). cygwin in no-cygwin mode).
""" """
# problems:
#
# * if you use a msvc compiled python version (1.5.2)
# 1. you have to insert a __GNUC__ section in its config.h
# 2. you have to generate a import library for its dll
# - create a def-file for python??.dll
# - create a import library using
# dlltool --dllname python15.dll --def python15.def \
# --output-lib libpython15.a
#
# see also http://starship.python.net/crew/kernr/mingw32/Notes.html
#
# * We use put export_symbols in a def-file, and don't use
# --export-all-symbols because it doesn't worked reliable in some
# tested configurations. And because other windows compilers also
# need their symbols specified this no serious problem.
#
# tested configurations:
#
# * cygwin gcc 2.91.57/ld 2.9.4/dllwrap 0.2.4 works
# (after patching python's config.h and for C++ some other include files)
# see also http://starship.python.net/crew/kernr/mingw32/Notes.html
# * mingw32 gcc 2.95.2/ld 2.9.4/dllwrap 0.2.4 works
# (ld doesn't support -shared, so we use dllwrap)
# * cygwin gcc 2.95.2/ld 2.10.90/dllwrap 2.10.90 works now
# - its dllwrap doesn't work, there is a bug in binutils 2.10.90
# see also .....
# - using gcc -mdll instead dllwrap doesn't work without -static because
# it tries to link against dlls instead their import libraries. (If
# it finds the dll first.)
# By specifying -static we force ld to link against the import libraries,
# this is windows standard and there are normally not the necessary symbols
# in the dlls.
# created 2000/05/05, Rene Liebscher # created 2000/05/05, Rene Liebscher
__revision__ = "$Id$" __revision__ = "$Id$"
import os,sys,string import os,sys
from distutils import sysconfig
from distutils.unixccompiler import UnixCCompiler from distutils.unixccompiler import UnixCCompiler
from distutils.file_util import write_file
# Because these compilers aren't configured in Python's config.h file by
# default we should at least warn the user if he is using a unmodified
# version.
def check_config_h():
"""Checks if the GCC compiler is mentioned in config.h. If it is not,
compiling probably doesn't work, so print a warning to stderr.
"""
# XXX the result of the check should be returned!
from distutils import sysconfig
import string,sys
try:
# It would probably better to read single lines to search.
# But we do this only once, and it is fast enough
f=open(sysconfig.get_config_h_filename())
s=f.read()
f.close()
try:
# is somewhere a #ifdef __GNUC__ or something similar
string.index(s,"__GNUC__")
except ValueError:
sys.stderr.write ("warning: "+
"Python's config.h doesn't seem to support your compiler.\n")
except IOError:
# if we can't read this file, we cannot say it is wrong
# the compiler will complain later about this file as missing
pass
# This is called when the module is imported, so we make this check only once
# XXX why not make it only when the compiler is needed?
check_config_h()
class CygwinCCompiler (UnixCCompiler): class CygwinCCompiler (UnixCCompiler):
compiler_type = 'cygwin' compiler_type = 'cygwin'
gcc_version = None
dllwrap_version = None
ld_version = None
def __init__ (self, def __init__ (self,
verbose=0, verbose=0,
@ -61,22 +62,45 @@ class CygwinCCompiler (UnixCCompiler):
UnixCCompiler.__init__ (self, verbose, dry_run, force) UnixCCompiler.__init__ (self, verbose, dry_run, force)
if check_config_h()<=0:
self.warn(
"Python's config.h doesn't seem to support your compiler. "
"Compiling may fail because of undefined preprocessor macros.")
(self.gcc_version, self.ld_version, self.dllwrap_version) = \
get_versions()
sys.stderr.write(self.compiler_type + ": gcc %s, ld %s, dllwrap %s\n" %
(self.gcc_version,
self.ld_version,
self.dllwrap_version) )
# ld_version >= "2.10.90" should also be able to use
# gcc -mdll instead of dllwrap
# Older dllwraps had own version numbers, newer ones use the
# same as the rest of binutils ( also ld )
# dllwrap 2.10.90 is buggy
if self.ld_version >= "2.10.90":
self.linker = "gcc"
else:
self.linker = "dllwrap"
# Hard-code GCC because that's what this is all about. # Hard-code GCC because that's what this is all about.
# XXX optimization, warnings etc. should be customizable. # XXX optimization, warnings etc. should be customizable.
self.set_executables(compiler='gcc -O -Wall', self.set_executables(compiler='gcc -mcygwin -O -Wall',
compiler_so='gcc -O -Wall', compiler_so='gcc -mcygwin -mdll -O -Wall',
linker_exe='gcc', linker_exe='gcc -mcygwin',
linker_so='dllwrap --target=i386-cygwin32') linker_so=('%s -mcygwin -mdll -static' %
self.linker))
# cygwin and mingw32 need different sets of libraries # cygwin and mingw32 need different sets of libraries
self.dll_libraries=[ if self.gcc_version == "2.91.57":
# cygwin shouldn't need msvcrt, # cygwin shouldn't need msvcrt, but without the dlls will crash
# but without the dll's will crash # (gcc version 2.91.57) -- perhaps something about initialization
# ( gcc version 2.91.57 ) self.dll_libraries=["msvcrt"]
# perhaps something about initialization self.warn(
# mingw32 needs it in all cases "Consider upgrading to a newer version of gcc")
"msvcrt" else:
] self.dll_libraries=[]
# __init__ () # __init__ ()
@ -93,64 +117,67 @@ class CygwinCCompiler (UnixCCompiler):
extra_postargs=None, extra_postargs=None,
build_temp=None): build_temp=None):
if libraries == None: # use separate copies, so can modify the lists
libraries = [] extra_preargs = list(extra_preargs or [])
libraries = list(libraries or [])
# Additional libraries: the python library is always needed on # Additional libraries
# Windows we need the python version without the dot, eg. '15'
pythonlib = ("python%d%d" %
(sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
libraries.append(pythonlib)
libraries.extend(self.dll_libraries) libraries.extend(self.dll_libraries)
# name of extension # we want to put some files in the same directory as the
# object files are, build_temp doesn't help much
# XXX WRONG WRONG WRONG # where are the object files
# this is NOT the place to make guesses about Python namespaces; temp_dir = os.path.dirname(objects[0])
# that MUST be done in build_ext.py
if not debug: # name of dll to give the helper files (def, lib, exp) the same name
ext_name = os.path.basename(output_filename)[:-len(".pyd")] (dll_name, dll_extension) = os.path.splitext(
os.path.basename(output_filename))
# generate the filenames for these files
def_file = None # this will be done later, if necessary
exp_file = os.path.join(temp_dir, dll_name + ".exp")
lib_file = os.path.join(temp_dir, 'lib' + dll_name + ".a")
#extra_preargs.append("--verbose")
if self.linker == "dllwrap":
extra_preargs.extend([#"--output-exp",exp_file,
"--output-lib",lib_file,
])
else: else:
ext_name = os.path.basename(output_filename)[:-len("_d.pyd")] # doesn't work: bfd_close build\...\libfoo.a: Invalid operation
extra_preargs.extend([#"-Wl,--out-implib,%s" % lib_file,
def_file = os.path.join(build_temp, ext_name + ".def") ])
#exp_file = os.path.join(build_temp, ext_name + ".exp")
#lib_file = os.path.join(build_temp, 'lib' + ext_name + ".a")
# check what we got in export_symbols
if export_symbols is not None:
# Make .def file # Make .def file
# (It would probably better to check if we really need this, # (It would probably better to check if we really need this,
# but for this we had to insert some unchanged parts of # but for this we had to insert some unchanged parts of
# UnixCCompiler, and this is not what we want.) # UnixCCompiler, and this is not what we want.)
f = open(def_file,"w") def_file = os.path.join(temp_dir, dll_name + ".def")
f.write("EXPORTS\n") # intro contents = [
if export_symbols == None: "LIBRARY %s" % os.path.basename(output_filename),
# export a function "init" + ext_name "EXPORTS"]
f.write("init" + ext_name + "\n")
else:
# if there are more symbols to export write them into f
for sym in export_symbols: for sym in export_symbols:
f.write(sym+"\n") contents.append(sym)
f.close() self.execute(write_file, (def_file, contents),
"writing %s" % def_file)
if extra_preargs == None: if def_file:
extra_preargs = [] if self.linker == "dllwrap":
# for dllwrap we have to use a special option
extra_preargs = extra_preargs + [ extra_preargs.append("--def")
#"--verbose", # for gcc/ld it is specified as any other object file
#"--output-exp",exp_file, extra_preargs.append(def_file)
#"--output-lib",lib_file,
"--def",def_file
]
# who wants symbols and a many times larger output file # who wants symbols and a many times larger output file
# should explicitly switch the debug mode on # should explicitly switch the debug mode on
# otherwise we let dllwrap strip the output file # otherwise we let dllwrap/ld strip the output file
# (On my machine unstripped_file = stripped_file + 254KB # (On my machine unstripped_file = stripped_file + 254KB
# 10KB < stripped_file < ??100KB ) # 10KB < stripped_file < ??100KB )
if not debug: if not debug:
extra_preargs = extra_preargs + ["-s"] extra_preargs.append("-s")
UnixCCompiler.link_shared_object(self, UnixCCompiler.link_shared_object(self,
objects, objects,
@ -159,7 +186,7 @@ class CygwinCCompiler (UnixCCompiler):
libraries, libraries,
library_dirs, library_dirs,
runtime_library_dirs, runtime_library_dirs,
None, # export_symbols, we do this with our def-file None, # export_symbols, we do this in our def-file
debug, debug,
extra_preargs, extra_preargs,
extra_postargs, extra_postargs,
@ -182,18 +209,114 @@ class Mingw32CCompiler (CygwinCCompiler):
CygwinCCompiler.__init__ (self, verbose, dry_run, force) CygwinCCompiler.__init__ (self, verbose, dry_run, force)
self.set_executables(compiler='gcc -mno-cygwin -O -Wall', # A real mingw32 doesn't need to specify a different entry point,
compiler_so='gcc -mno-cygwin -O -Wall', # but cygwin 2.91.57 in no-cygwin-mode needs it.
linker_exe='gcc -mno-cygwin', if self.gcc_version <= "2.91.57":
linker_so='dllwrap' entry_point = '--entry _DllMain@12'
+ ' --target=i386-mingw32' else:
+ ' --entry _DllMain@12') entry_point = ''
# mingw32 doesn't really need 'target' and cygwin too (it seems,
# it is enough to specify a different entry point)
# no additional libraries need self.set_executables(compiler='gcc -mno-cygwin -O -Wall',
# (only msvcrt, which is already added by CygwinCCompiler) compiler_so='gcc -mno-cygwin -mdll -O -Wall',
linker_exe='gcc -mno-cygwin',
linker_so='%s -mno-cygwin -mdll -static %s'
% (self.linker, entry_point))
# Maybe we should also append -mthreads, but then the finished
# dlls need another dll (mingwm10.dll see Mingw32 docs)
# (-mthreads: Support thread-safe exception handling on `Mingw32')
# no additional libraries needed
self.dll_libraries=[]
# __init__ () # __init__ ()
# class Mingw32CCompiler # class Mingw32CCompiler
# Because these compilers aren't configured in Python's config.h file by
# default, we should at least warn the user if he is using a unmodified
# version.
def check_config_h():
"""Checks if the GCC compiler is mentioned in config.h. If it is not,
compiling probably doesn't work.
"""
# return values
# 2: OK, python was compiled with GCC
# 1: OK, python's config.h mentions __GCC__
# 0: uncertain, because we couldn't check it
# -1: probably not OK, because we didn't found it in config.h
# You could check check_config_h()>0 => OK
from distutils import sysconfig
import string,sys
# if sys.version contains GCC then python was compiled with
# GCC, and the config.h file should be OK
if -1 == string.find(sys.version,"GCC"):
pass # go to the next test
else:
return 2
try:
# It would probably better to read single lines to search.
# But we do this only once, and it is fast enough
f=open(sysconfig.get_config_h_filename())
s=f.read()
f.close()
# is somewhere a #ifdef __GNUC__ or something similar
if -1 == string.find(s,"__GNUC__"):
return -1
else:
return 1
except IOError:
# if we can't read this file, we cannot say it is wrong
# the compiler will complain later about this file as missing
pass
return 0
def get_versions():
""" Try to find out the versions of gcc, ld and dllwrap.
If not possible it returns None for it.
"""
from distutils.version import StrictVersion
from distutils.spawn import find_executable
import re
gcc_exe = find_executable('gcc')
if gcc_exe:
out = os.popen(gcc_exe + ' -dumpversion','r')
out_string = out.read()
out.close()
result = re.search('(\d+\.\d+\.\d+)',out_string)
if result:
gcc_version = StrictVersion(result.group(1))
else:
gcc_version = None
else:
gcc_version = None
ld_exe = find_executable('ld')
if ld_exe:
out = os.popen(ld_exe + ' -v','r')
out_string = out.read()
out.close()
result = re.search('(\d+\.\d+\.\d+)',out_string)
if result:
ld_version = StrictVersion(result.group(1))
else:
ld_version = None
else:
ld_version = None
dllwrap_exe = find_executable('dllwrap')
if dllwrap_exe:
out = os.popen(dllwrap_exe + ' --version','r')
out_string = out.read()
out.close()
result = re.search(' (\d+\.\d+\.\d+)',out_string)
if result:
dllwrap_version = StrictVersion(result.group(1))
else:
dllwrap_version = None
else:
dllwrap_version = None
return (gcc_version, ld_version, dllwrap_version)