configure: Restore saved CFLAGS

When we test for whether the C compiler can take the
-fno-strength-reduce flag, we add the flag to CFLAGS to do so.
However, we were not restoring the old value of this flag when we
completed the test, and so we were always setting -fno-strength-reduce
in the userspace compile.

Previously, this was harmless, as we always overwrote CFLAGS, but if
we're moving to a world where we honour the user's setting of CFLAGS,
we need to not leak changes in this way.

Change-Id: I029c9fe91132ced34867445afe673761a597ccbe
Reviewed-on: http://gerrit.openafs.org/2894
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>

diff --git a/src/cf/linux-test5.m4 b/src/cf/linux-test5.m4
index 0b86d2e753e82367ea59ffbd70c16d1ba7fdb5af..90c312cba1cae564223dc5f3e563323d37ed199d 100644 (file)
--- a/src/cf/linux-test5.m4
+++ b/src/cf/linux-test5.m4
@@ -40,6 +40,7 @@ AC_DEFUN([OPENAFS_GCC_NEEDS_NO_STRENGTH_REDUCE], [
                    [int x;],
                    [openafs_cv_gcc_needs_no_strength_reduce=yes],
                    [openafs_cv_gcc_needs_no_strength_reduce=no])
+     CFLAGS="$save_CFLAGS"
   ])
   AS_IF([test x$openafs_cv_gcc_needs_no_strength_reduce = xyes],
         [LINUX_GCC_KOPTS="$LINUX_GCC_KOPTS -fno-strength-reduce"])