"""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 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 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)

# This module should be kept compatible with Python 2.1.

__revision__ = "$Id: cygwinccompiler.py 37828 2004-11-10 22:23:15Z loewis $"

import os,sys,copy

from distutils.ccompiler import gen_preprocess_options, gen_lib_options

from distutils.unixccompiler import UnixCCompiler

from distutils.file_util import write_file

from distutils.errors import DistutilsExecError, CompileError, UnknownFileError

from distutils import log

class CygwinCCompiler (UnixCCompiler):

    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:

            self.dll_libraries=[]

            # Include the appropriate MSVC runtime library if Python was built

            # with MSVC 7.0 or 7.1.

            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

                    self.dll_libraries = ['msvcr70']

                elif msc_ver == '1310':

                    # MSVC 7.1

                    self.dll_libraries = ['msvcr71']

    # __init__ ()

    def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):

        if ext == '.rc' or ext == '.res':

            # gcc needs '.res' and '.rc' compiled to object files !!!

            try:

                self.spawn(["windres", "-i", src, "-o", obj])

            except DistutilsExecError, msg:

                raise CompileError, msg

        else: # for other files use the C-compiler

            try:

                self.spawn(self.compiler_so + cc_args + [src, '-o', obj] +

                           extra_postargs)

            except DistutilsExecError, msg:

                raise CompileError, msg

    def link (self,

              target_desc,

              objects,

              output_filename,

              output_dir=None,

              libraries=None,

              library_dirs=None,

              runtime_library_dirs=None,

              export_symbols=None,

              debug=0,

              extra_preargs=None,

              extra_postargs=None,

              build_temp=None,

              target_lang=None):

        # use separate copies, so we can modify the lists

        extra_preargs = copy.copy(extra_preargs or [])

        libraries = copy.copy(libraries or [])

        objects = copy.copy(objects or [])

        # Additional libraries

        libraries.extend(self.dll_libraries)

        # handle export symbols by creating a def-file

        # with executables this only works with gcc/ld as linker

        if ((export_symbols is not None) and

            (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):

            # (The linker doesn't do anything if output is up-to-date.

            # So it would probably better to check if we really need this,

            # but for this we had to insert some unchanged parts of

            # UnixCCompiler, and this is not what we want.)

            # we want to put some files in the same directory as the

            # object files are, build_temp doesn't help much

            # where are the object files

            temp_dir = os.path.dirname(objects[0])

            # name of dll to give the helper files the same base name

            (dll_name, dll_extension) = os.path.splitext(

                os.path.basename(output_filename))

            # generate the filenames for these files

            def_file = os.path.join(temp_dir, dll_name + ".def")

            lib_file = os.path.join(temp_dir, 'lib' + dll_name + ".a")

            # Generate .def file

            contents = [

                "LIBRARY %s" % os.path.basename(output_filename),

                "EXPORTS"]

            for sym in export_symbols:

                contents.append(sym)

            self.execute(write_file, (def_file, contents),

                         "writing %s" % def_file)

            # next add options for def-file and to creating import libraries

            # dllwrap uses different options than gcc/ld

            if self.linker_dll == "dllwrap":

                extra_preargs.extend(["--output-lib", lib_file])

                # for dllwrap we have to use a special option

                extra_preargs.extend(["--def", def_file])

            # we use gcc/ld here and can be sure ld is >= 2.9.10

            else:

                # doesn't work: bfd_close build\...\libfoo.a: Invalid operation

                #extra_preargs.extend(["-Wl,--out-implib,%s" % lib_file])

                # for gcc/ld the def-file is specified as any object files

                objects.append(def_file)

        #end: if ((export_symbols is not None) and

        #        (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):

        # who wants symbols and a many times larger output file

        # should explicitly switch the debug mode on

        # otherwise we let dllwrap/ld strip the output file

        # (On my machine: 10KB < stripped_file < ??100KB

        #   unstripped_file = stripped_file + XXX KB

        #  ( XXX=254 for a typical python extension))

        if not debug:

            extra_preargs.append("-s")

        UnixCCompiler.link(self,

                           target_desc,

                           objects,

                           output_filename,

                           output_dir,

                           libraries,

                           library_dirs,

                           runtime_library_dirs,

                           None, # export_symbols, we do this in our def-file

                           debug,

                           extra_preargs,

                           extra_postargs,

                           build_temp,

                           target_lang)

    # link ()

    # -- Miscellaneous methods -----------------------------------------

    # overwrite the one from CCompiler to support rc and res-files

    def object_filenames (self,

                          source_filenames,

                          strip_dir=0,

                          output_dir=''):

        if output_dir is None: output_dir = ''

        obj_names = []

        for src_name in source_filenames:

            # use normcase to make sure '.rc' is really '.rc' and not '.RC'

            (base, ext) = os.path.splitext (os.path.normcase(src_name))

            if ext not in (self.src_extensions + ['.rc','.res']):

                raise UnknownFileError, \

                      "unknown file type '%s' (from '%s')" % \

                      (ext, src_name)

            if strip_dir:

                base = os.path.basename (base)

            if ext == '.res' or ext == '.rc':

                # these need to be compiled to object files

                obj_names.append (os.path.join (output_dir,

                                            base + ext + self.obj_extension))

            else:

                obj_names.append (os.path.join (output_dir,

                                            base + self.obj_extension))

        return obj_names

    # object_filenames ()

# class CygwinCCompiler

# the same as cygwin plus some additional parameters

class Mingw32CCompiler (CygwinCCompiler):

    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 = ''

        self.set_executables(compiler='gcc -mno-cygwin -O -Wall',

                             compiler_so='gcc -mno-cygwin -mdll -O -Wall',

                             compiler_cxx='g++ -mno-cygwin -O -Wall',

                             linker_exe='gcc -mno-cygwin',

                             linker_so='%s -mno-cygwin %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 7.1.

        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

                self.dll_libraries = ['msvcr70']

            elif msc_ver == '1310':

                # MSVC 7.1

                self.dll_libraries = ['msvcr71']

    # __init__ ()

# class Mingw32CCompiler

# 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 a 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 (specifically, pyconfig.h)

    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...

    from distutils import sysconfig

    import string

    # if sys.version contains GCC then python was compiled with

    # GCC, and the pyconfig.h file should be OK

    if string.find(sys.version,"GCC") >= 0:

        return (CONFIG_H_OK, "sys.version mentions 'GCC'")

    fn = sysconfig.get_config_h_filename()

    try:

        # It would probably better to read single lines to search.

        # But we do this only once, and it is fast enough

        f = open(fn)

        s = f.read()

        f.close()

    except IOError, exc:

        # if we can't read this file, we cannot say it is wrong

        # the compiler will complain later about this file as missing

        return (CONFIG_H_UNCERTAIN,

                "couldn't read '%s': %s" % (fn, exc.strerror))

    else:

        # "pyconfig.h" contains an "#ifdef __GNUC__" or something similar

        if string.find(s,"__GNUC__") >= 0:

            return (CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn)

        else:

            return (CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn)

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)