From 03ad99f09fb1966e478910970503ff4dde2701fb Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Thu, 9 Mar 1995 14:09:54 +0000
Subject: added test for CC value not matching cache

---
 configure.in | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.in b/configure.in
index 0ef0473..78ec997 100644
--- a/configure.in
+++ b/configure.in
@@ -17,6 +17,13 @@ AC_ARG_WITH(gcc, [--without-gcc             never use gcc], [
 	esac], [without_gcc=no])
 AC_MSG_RESULT($without_gcc)
 
+# If the user switches compilers, we can't believe the cache
+if test ! -z "$ac_cv_prog_CC" -a ! -z "$CC" -a "$CC" != "$ac_cv_prog_CC"
+then
+  AC_ERROR(cached CC is different -- throw away $cache_file
+(it is also a good idea to do 'make clean' before compiling))
+fi
+
 AC_PROG_CC
 AC_PROG_RANLIB
 AC_SUBST(AR)
-- 
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