On linux, when CC is set, we expect that the LDSHARED is set accordingly.
Currently, only on OS X, the LDSHARED is set properly.

Below is the proposed patch

--- a/Lib/distutils/sysconfig.py        2015-08-24 11:58:37.265683872 -0700
+++ b/Lib/distutils/sysconfig.py        2015-08-24 11:57:29.673945173 -0700
@@ -180,9 +180,9 @@
             if _USE_CLANG:
                 newcc = 'clang'
         if newcc:
-            # On OS X and linux, if CC is overridden, use that as the default
+            # On OS X, if CC is overridden, use that as the default
             #       command for LDSHARED as well
-            if ((sys.platform == 'darwin' or sys.platform.startswith('linux'))
+            if (sys.platform == 'darwin'
                     and 'LDSHARED' not in os.environ
                     and ldshared.startswith(cc)):
                 ldshared = newcc + ldshared[len(cc):]

looks like the patch was reversed, but otherwise should be clear what we're going for

Distutils is now deprecated (see PEP 632) and all tagged issues are being closed. From now until removal, only release blocking issues will be considered for distutils.

If this issue does not relate to distutils, please remove the component and reopen it. If you believe it still requires a fix, most likely the issue should be re-reported at https://github.com/pypa/setuptools