This patch fixes the following bugs:

[#413582] g++ must be called for c++ extensions
[#454030] distutils cannot link C++ code with GCC

topdir = "Lib/distutils"

* bcppcompiler.py
  (BCPPCompiler.create_static_lib): Fixed prototype, removing extra_preargs
  and extra_postargs parameters. Included target_lang parameter.
  (BCPPCompiler.link): Included target_lang parameter.

* msvccompiler.py
  (MSVCCompiler.create_static_lib): Fixed prototype, removing extra_preargs
  and extra_postargs parameters. Included target_lang parameter.
  (MSVCCompiler.link): Included target_lang parameter.

* ccompiler.py
  (CCompiler): New language_map and language_order attributes, used by
  CCompiler.detect_language().

  (CCompiler.detect_language): New method, will return the language of
  a given source, or list of sources. Individual source language is
  detected using the language_map dict. When mixed sources are used,
  language_order will stablish the language precedence.

  (CCompiler.create_static_lib, CCompiler.link, CCompiler.link_executable,
   CCompiler.link_shared_object, CCompiler.link_shared_lib):
  Inlcuded target_lang parameter.

* cygwinccompiler.py
  (CygwinCCompiler.link): Included target_lang parameter.

* emxccompiler.py
  (EMXCCompiler.link): Included target_lang parameter.

* mwerkscompiler.py
  (MWerksCompiler.link): Included target_lang parameter.

* extension.py
  (Extension.__init__): New 'language' parameter/attribute, initialized
  to None by default. If provided will overlap the automatic detection
  made by CCompiler.detect_language(), in build_ext command.

* sysconfig.py
  (customize_compiler): Check Makefile for CXX option, and also the
  environment variable CXX. Use the resulting value in the 'compiler_cxx'
  parameter of compiler.set_executables().

* unixccompiler.py
  (UnixCCompiler): Included 'compiler_cxx' in executables dict, defaulting
  to 'cc'.
  (UnixCCompiler.create_static_lib): Included target_lang parameter.
  (UnixCCompiler.link): Included target_lang parameter, and made
  linker command use compiler_cxx, if target_lang is 'c++'.

* command/build_ext.py
  (build_ext.build_extension): Pass new ext.language attribute
  to compiler.link_shared_object()'s target_lang parameter. If
  ext.language is not provided, detect language using
  compiler.detect_language(sources) instead.

* command/config.py
  (config._link): Pass already available lang parameter as target_lang
  parameter of compiler.link_executable().

1 files changed, 3 insertions, 7 deletions

diff --git a/Lib/distutils/msvccompiler.py b/Lib/distutils/msvccompiler.py
index 65b1143..a2459ad 100644
--- a/Lib/distutils/msvccompiler.py
+++ b/Lib/distutils/msvccompiler.py
@@ -367,8 +367,7 @@ class MSVCCompiler (CCompiler) :
                            output_libname,
                            output_dir=None,
                            debug=0,
-                           extra_preargs=None,
-                           extra_postargs=None):
+                           target_lang=None):
 
         (objects, output_dir) = self._fix_object_args (objects, output_dir)
         output_filename = \
@@ -378,10 +377,6 @@ class MSVCCompiler (CCompiler) :
             lib_args = objects + ['/OUT:' + output_filename]
             if debug:
                 pass                    # XXX what goes here?
-            if extra_preargs:
-                lib_args[:0] = extra_preargs
-            if extra_postargs:
-                lib_args.extend (extra_postargs)
             try:
                 self.spawn ([self.lib] + lib_args)
             except DistutilsExecError, msg:
@@ -404,7 +399,8 @@ class MSVCCompiler (CCompiler) :
               debug=0,
               extra_preargs=None,
               extra_postargs=None,
-              build_temp=None):
+              build_temp=None,
+              target_lang=None):
 
         (objects, output_dir) = self._fix_object_args (objects, output_dir)
         (libraries, library_dirs, runtime_library_dirs) = \