diff --git a/configure b/configure
index a4287bc71f9..7afe2c84132 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 80576 .
+# From configure.in Revision: 80648 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.65 for python 3.2.
 #
@@ -3176,7 +3176,9 @@ then
 (it is also a good idea to do 'make clean' before compiling)" "$LINENO" 5
 fi
 
-save_CFLAGS=$CFLAGS
+# If the user set CFLAGS, use this instead of the automatically
+# determined setting
+preset_cflags="$CFLAGS"
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -3968,7 +3970,10 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
-CFLAGS=$save_CFLAGS
+if test ! -z "$preset_cflags"
+then
+	CFLAGS=$preset_cflags
+fi
 
 
 
diff --git a/configure.in b/configure.in
index c127a632181..0cd867c56ab 100644
--- a/configure.in
+++ b/configure.in
@@ -478,9 +478,14 @@ then
 (it is also a good idea to do 'make clean' before compiling)])
 fi
 
-save_CFLAGS=$CFLAGS
+# If the user set CFLAGS, use this instead of the automatically
+# determined setting
+preset_cflags="$CFLAGS"
 AC_PROG_CC
-CFLAGS=$save_CFLAGS
+if test ! -z "$preset_cflags"
+then
+	CFLAGS=$preset_cflags
+fi
 
 AC_SUBST(CXX)
 AC_SUBST(MAINCC)