# HG changeset patch
# Parent ab9d6c4907e76c45e870935bfb2b33697e15db68
Issue #13994: Since it has been discovered that at least one third-party
package had been changed to use the inadvertently released duplicated
version of distutils.sysconfig.customize_compiler that was removed from
distutils.ccompile in 2.7.3, provide a compatibility wrapper function to
avoid breaking of any such modified package.

diff --git a/Lib/distutils/ccompiler.py b/Lib/distutils/ccompiler.py
--- a/Lib/distutils/ccompiler.py
+++ b/Lib/distutils/ccompiler.py
@@ -1091,3 +1091,30 @@
             lib_opts.append(compiler.library_option(lib))
 
     return lib_opts
+
+# Issue13994: during the 2.7 developmenet cycle, customize_compiler was briefly
+#       moved from its original location in distutils.sysconfig to this module,
+#       distutils.ccompiler.  Prior to 2.7 release, it was decided to freeze
+#       distutils and revert feature changes.  Unfortunately, not everything
+#       was cleanly reverted.  customize_compiler was restored in the original
+#       location but the new copy was not removed, leaving two versions.  For
+#       2.7.3, that oversight was corrected but it was discovered that at least
+#       one third-party package had been modified to use the new, undocumented
+#       location that was supposed to have been removed before release.  This
+#       wrapper function provides compatibility for that package and any others
+#       that might have been changed for 2.7.  New code should continue to use
+#       the original, documented import from distutils.sysconfig as only 2.7
+#       was affected by this issue.
+
+_customize_compiler = None
+
+def customize_compiler(compiler):
+    """Do any platform-specific customization of a CCompiler instance.
+
+    Wrapper for distutils.sysconfig.customize_compiler to workaround
+    compatibility issue in Python 2.7.x.
+    """
+    global _customize_compiler
+    if _customize_compiler is None:
+        from distutils.sysconfig import customize_compiler as _customize_compiler
+    return _customize_compiler(compiler)