From 7116a7c308e9dcd8fcefdba77a6551694bd397a5 Mon Sep 17 00:00:00 2001
From: Roumen Petrov <local@example.net>
Date: Sat, 2 Mar 2013 22:27:02 +0200
Subject: [PATCH 15/24] MINGW: build extensions with GCC

---
 Lib/distutils/command/build_ext.py | 22 ++++++++++++++++++++--
 Lib/distutils/util.py              |  2 ++
 Lib/sysconfig.py                   |  2 ++
 3 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/Lib/distutils/command/build_ext.py b/Lib/distutils/command/build_ext.py
index 495de2a..6cea693 100644
--- a/Lib/distutils/command/build_ext.py
+++ b/Lib/distutils/command/build_ext.py
@@ -190,7 +190,11 @@ class build_ext(Command):
         # for extensions under windows use different directories
         # for Release and Debug builds.
         # also Python's library directory must be appended to library_dirs
-        if os.name == 'nt':
+
+        use_libdir = ( self.plat_name.startswith(('mingw'))
+                       or sys.platform.startswith(('linux', 'gnu', 'sunos')) )
+
+        if os.name == 'nt' and not use_libdir:
             # the 'libs' directory is for binary installs - we assume that
             # must be the *native* platform.  But we don't really support
             # cross-compiling via a binary install anyway, so we let it go.
@@ -245,7 +249,7 @@ class build_ext(Command):
         # for extensions under Linux or Solaris with a shared Python library,
         # Python's library directory must be appended to library_dirs
         sysconfig.get_config_var('Py_ENABLE_SHARED')
-        if (sys.platform.startswith(('linux', 'gnu', 'sunos'))
+        if (use_libdir
             and sysconfig.get_config_var('Py_ENABLE_SHARED')):
             if not sysconfig.python_build:
                 # building third party extensions
@@ -692,6 +696,20 @@ class build_ext(Command):
         # pyconfig.h that MSVC groks.  The other Windows compilers all seem
         # to need it mentioned explicitly, though, so that's what we do.
         # Append '_d' to the python import library on debug builds.
+
+        # Use self.plat_name as it works even in case of
+        # cross-compilation (at least for mingw build).
+        if self.plat_name.startswith('mingw'):
+            from distutils import sysconfig
+            extra = []
+            for lib in (
+                sysconfig.get_config_var('BLDLIBRARY').split()
+                + sysconfig.get_config_var('SHLIBS').split()
+                ):
+                if lib.startswith('-l'):
+                    extra.append(lib[2:])
+            return ext.libraries + extra
+
         if sys.platform == "win32":
             from distutils.msvccompiler import MSVCCompiler
             if not isinstance(self.compiler, MSVCCompiler):
diff --git a/Lib/distutils/util.py b/Lib/distutils/util.py
index efb3834..e5af80c 100644
--- a/Lib/distutils/util.py
+++ b/Lib/distutils/util.py
@@ -40,6 +40,8 @@ def get_platform ():
     For other non-POSIX platforms, currently just returns 'sys.platform'.
     """
     if os.name == 'nt':
+        if 'GCC' in sys.version:
+            return 'mingw'
         # sniff sys.version for architecture.
         prefix = " bit ("
         i = sys.version.find(prefix)
diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
index ee38a20..8720e50 100644
--- a/Lib/sysconfig.py
+++ b/Lib/sysconfig.py
@@ -607,6 +607,8 @@ def get_platform():
     For other non-POSIX platforms, currently just returns 'sys.platform'.
     """
     if os.name == 'nt':
+        if 'GCC' in sys.version:
+            return 'mingw'
         # sniff sys.version for architecture.
         prefix = " bit ("
         i = sys.version.find(prefix)
-- 
1.7.12.1