Introduced EXTRA_CFLAGS as an environment variable used by the Makefile. Meant
to be used for flags that change binary compatibility.
Distutils was tweaked to also use the variable if used during compilation of
the interpreter.
diff --git a/README b/README
index dedd3bd..f1c3a89 100644
--- a/README
+++ b/README
@@ -827,6 +827,9 @@
Additional debugging code to help debug memory management problems can
be enabled by using the --with-pydebug option to the configure script.
+For flags that change binary compatibility, use the EXTRA_CFLAGS
+variable.
+
Profiling
---------