| """distutils.cygwinccompiler |
| |
| Provides the CygwinCCompiler class, a subclass of UnixCCompiler that |
| handles the Cygwin port of the GNU C compiler to Windows. It also contains |
| the Mingw32CCompiler class which handles the mingw32 port of GCC (same as |
| 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 an import library for its dll |
| # - create a def-file for python??.dll |
| # - create an 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 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 http://sources.redhat.com/ml/cygwin/2000-06/msg01274.html |
| # - 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. |
| # *** only the version of June 2000 shows these problems |
| # * cygwin gcc 3.2/ld 2.13.90 works |
| # (ld supports -shared) |
| # * mingw gcc 3.2/ld 2.13 works |
| # (ld supports -shared) |
| |
| import sys |
| from subprocess import Popen, PIPE, check_output |
| import re |
| |
| from distutils.unixccompiler import UnixCCompiler |
| from distutils.errors import CCompilerError |
| from distutils.version import LooseVersion |
| from distutils.spawn import find_executable |
| |
| def get_msvcr(): |
| """Include the appropriate MSVC runtime library if Python was built |
| with MSVC 7.0 or later. |
| """ |
| msc_pos = sys.version.find('MSC v.') |
| if msc_pos != -1: |
| msc_ver = sys.version[msc_pos+6:msc_pos+10] |
| if msc_ver == '1300': |
| # MSVC 7.0 |
| return ['msvcr70'] |
| elif msc_ver == '1310': |
| # MSVC 7.1 |
| return ['msvcr71'] |
| elif msc_ver == '1400': |
| # VS2005 / MSVC 8.0 |
| return ['msvcr80'] |
| elif msc_ver == '1500': |
| # VS2008 / MSVC 9.0 |
| return ['msvcr90'] |
| elif msc_ver == '1600': |
| # VS2010 / MSVC 10.0 |
| return ['msvcr100'] |
| else: |
| raise ValueError("Unknown MS Compiler version %s " % msc_ver) |
| |
| |
| class CygwinCCompiler(UnixCCompiler): |
| """ Handles the Cygwin port of the GNU C compiler to Windows. |
| """ |
| compiler_type = 'cygwin' |
| obj_extension = ".o" |
| static_lib_extension = ".a" |
| shared_lib_extension = ".dll" |
| static_lib_format = "lib%s%s" |
| shared_lib_format = "%s%s" |
| exe_extension = ".exe" |
| |
| def __init__(self, verbose=0, dry_run=0, force=0): |
| |
| UnixCCompiler.__init__(self, verbose, dry_run, force) |
| |
| status, details = check_config_h() |
| self.debug_print("Python's GCC status: %s (details: %s)" % |
| (status, details)) |
| if status is not CONFIG_H_OK: |
| self.warn( |
| "Python's pyconfig.h doesn't seem to support your compiler. " |
| "Reason: %s. " |
| "Compiling may fail because of undefined preprocessor macros." |
| % details) |
| |
| self.gcc_version, self.ld_version, self.dllwrap_version = \ |
| get_versions() |
| self.debug_print(self.compiler_type + ": gcc %s, ld %s, dllwrap %s\n" % |
| (self.gcc_version, |
| self.ld_version, |
| self.dllwrap_version) ) |
| |
| # ld_version >= "2.10.90" and < "2.13" 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_dll = "gcc" |
| else: |
| self.linker_dll = "dllwrap" |
| |
| # ld_version >= "2.13" support -shared so use it instead of |
| # -mdll -static |
| if self.ld_version >= "2.13": |
| shared_option = "-shared" |
| else: |
| shared_option = "-mdll -static" |
| |
| # Hard-code GCC because that's what this is all about. |
| # XXX optimization, warnings etc. should be customizable. |
| self.set_executables(compiler='gcc -mcygwin -O -Wall', |
| compiler_so='gcc -mcygwin -mdll -O -Wall', |
| compiler_cxx='g++ -mcygwin -O -Wall', |
| linker_exe='gcc -mcygwin', |
| linker_so=('%s -mcygwin %s' % |
| (self.linker_dll, shared_option))) |
| |
| # cygwin and mingw32 need different sets of libraries |
| if self.gcc_version == "2.91.57": |
| # cygwin shouldn't need msvcrt, but without the dlls will crash |
| # (gcc version 2.91.57) -- perhaps something about initialization |
| self.dll_libraries=["msvcrt"] |
| self.warn( |
| "Consider upgrading to a newer version of gcc") |
| else: |
| # Include the appropriate MSVC runtime library if Python was built |
| # with MSVC 7.0 or later. |
| self.dll_libraries = get_msvcr() |
| |
| |
| # the same as cygwin plus some additional parameters |
| class Mingw32CCompiler(CygwinCCompiler): |
| """ Handles the Mingw32 port of the GNU C compiler to Windows. |
| """ |
| compiler_type = 'mingw32' |
| |
| def __init__(self, verbose=0, dry_run=0, force=0): |
| |
| CygwinCCompiler.__init__ (self, verbose, dry_run, force) |
| |
| # ld_version >= "2.13" support -shared so use it instead of |
| # -mdll -static |
| if self.ld_version >= "2.13": |
| shared_option = "-shared" |
| else: |
| shared_option = "-mdll -static" |
| |
| # A real mingw32 doesn't need to specify a different entry point, |
| # but cygwin 2.91.57 in no-cygwin-mode needs it. |
| if self.gcc_version <= "2.91.57": |
| entry_point = '--entry _DllMain@12' |
| else: |
| entry_point = '' |
| |
| if is_cygwingcc(): |
| raise CCompilerError( |
| 'Cygwin gcc cannot be used with --compiler=mingw32') |
| |
| self.set_executables(compiler='gcc -O -Wall', |
| compiler_so='gcc -mdll -O -Wall', |
| compiler_cxx='g++ -O -Wall', |
| linker_exe='gcc', |
| linker_so='%s %s %s' |
| % (self.linker_dll, shared_option, |
| 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=[] |
| |
| # Include the appropriate MSVC runtime library if Python was built |
| # with MSVC 7.0 or later. |
| self.dll_libraries = get_msvcr() |
| |
| # Because these compilers aren't configured in Python's pyconfig.h file by |
| # default, we should at least warn the user if he is using an unmodified |
| # version. |
| |
| CONFIG_H_OK = "ok" |
| CONFIG_H_NOTOK = "not ok" |
| CONFIG_H_UNCERTAIN = "uncertain" |
| |
| def check_config_h(): |
| """Check if the current Python installation appears amenable to building |
| extensions with GCC. |
| |
| Returns a tuple (status, details), where 'status' is one of the following |
| constants: |
| |
| - CONFIG_H_OK: all is well, go ahead and compile |
| - CONFIG_H_NOTOK: doesn't look good |
| - CONFIG_H_UNCERTAIN: not sure -- unable to read pyconfig.h |
| |
| 'details' is a human-readable string explaining the situation. |
| |
| Note there are two ways to conclude "OK": either 'sys.version' contains |
| the string "GCC" (implying that this Python was built with GCC), or the |
| installed "pyconfig.h" contains the string "__GNUC__". |
| """ |
| |
| # XXX since this function also checks sys.version, it's not strictly a |
| # "pyconfig.h" check -- should probably be renamed... |
| |
| import sysconfig |
| |
| # if sys.version contains GCC then python was compiled with GCC, and the |
| # pyconfig.h file should be OK |
| if "GCC" in sys.version: |
| return CONFIG_H_OK, "sys.version mentions 'GCC'" |
| |
| # let's see if __GNUC__ is mentioned in python.h |
| fn = sysconfig.get_config_h_filename() |
| try: |
| config_h = open(fn) |
| try: |
| if "__GNUC__" in config_h.read(): |
| return CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn |
| else: |
| return CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn |
| finally: |
| config_h.close() |
| except OSError as exc: |
| return (CONFIG_H_UNCERTAIN, |
| "couldn't read '%s': %s" % (fn, exc.strerror)) |
| |
| RE_VERSION = re.compile(br'(\d+\.\d+(\.\d+)*)') |
| |
| def _find_exe_version(cmd): |
| """Find the version of an executable by running `cmd` in the shell. |
| |
| If the command is not found, or the output does not match |
| `RE_VERSION`, returns None. |
| """ |
| executable = cmd.split()[0] |
| if find_executable(executable) is None: |
| return None |
| out = Popen(cmd, shell=True, stdout=PIPE).stdout |
| try: |
| out_string = out.read() |
| finally: |
| out.close() |
| result = RE_VERSION.search(out_string) |
| if result is None: |
| return None |
| # LooseVersion works with strings |
| # so we need to decode our bytes |
| return LooseVersion(result.group(1).decode()) |
| |
| def get_versions(): |
| """ Try to find out the versions of gcc, ld and dllwrap. |
| |
| If not possible it returns None for it. |
| """ |
| commands = ['gcc -dumpversion', 'ld -v', 'dllwrap --version'] |
| return tuple([_find_exe_version(cmd) for cmd in commands]) |
| |
| def is_cygwingcc(): |
| '''Try to determine if the gcc that would be used is from cygwin.''' |
| out_string = check_output(['gcc', '-dumpmachine']) |
| return out_string.strip().endswith(b'cygwin') |
