# DP: Allow setting BASECFLAGS, OPT and EXTRA_LDFLAGS (like, CC, CXX, CPP,
# DP: CFLAGS, CPPFLAGS, CCSHARED, LDSHARED) from the environment.

Index: b/Lib/distutils/sysconfig.py
===================================================================
--- a/Lib/distutils/sysconfig.py
+++ b/Lib/distutils/sysconfig.py
@@ -153,8 +153,8 @@
     varies across Unices and is stored in Python's Makefile.
     """
     if compiler.compiler_type == "unix":
-        (cc, cxx, opt, cflags, ccshared, ldshared, so_ext, ar, ar_flags) = \
-            get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS',
+        (cc, cxx, opt, cflags, extra_cflags, basecflags, ccshared, ldshared, so_ext, ar, ar_flags) = \
+            get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS', 'EXTRA_CFLAGS', 'BASECFLAGS',
                             'CCSHARED', 'LDSHARED', 'SO', 'AR',
                             'ARFLAGS')
 
@@ -200,8 +200,13 @@
             cpp = cc + " -E"           # not always
         if 'LDFLAGS' in os.environ:
             ldshared = ldshared + ' ' + os.environ['LDFLAGS']
+        if 'BASECFLAGS' in os.environ:
+            basecflags = os.environ['BASECFLAGS']
+        if 'OPT' in os.environ:
+            opt = os.environ['OPT']
+        cflags = ' '.join(str(x) for x in (basecflags, opt, extra_cflags) if x)
         if 'CFLAGS' in os.environ:
-            cflags = opt + ' ' + os.environ['CFLAGS']
+            cflags = ' '.join(str(x) for x in (basecflags, opt, os.environ['CFLAGS'], extra_cflags) if x)
             ldshared = ldshared + ' ' + os.environ['CFLAGS']
         if 'CPPFLAGS' in os.environ:
             cpp = cpp + ' ' + os.environ['CPPFLAGS']