Inherit compiler flags in the original order

glibc.spec

@@ -703,20 +703,14 @@ df
 GCC=gcc
 GXX=g++
 
-# True if the compiler flag in the first argument is listed in
-# redhat-rpm-config.
-rpm_has_compiler_flag ()
-{
-	echo " $RPM_OPT_FLAGS $RPM_LD_FLAGS " | grep -q -F " $1 "
-}
-
 # Propagates the listed flags to BuildFlags if supplied by redhat-rpm-config.
 BuildFlags="-O2 -g"
 rpm_inherit_flags ()
 {
+	local reference=" $* "
 	local flag
-	for flag in "$@" ; do
-		if rpm_has_compiler_flag "$flag" ; then
+	for flag in $RPM_OPT_FLAGS $RPM_LD_FLAGS ; do
+		if echo "$reference" | grep -q -F " $flag " ; then
 			BuildFlags="$BuildFlags $flag"
 		fi
 	done
@@ -1850,6 +1844,7 @@ fi
 * Fri May 11 2018 Florian Weimer <fweimer@redhat.com> - 2.27.9000-17
 - Avoid exporting some Sun RPC symbols with default versions (#1577210)
 - Inherit the -mstackrealign flag if it is set
+- Inherit compiler flags in the original order
 - Auto-sync with upstream branch master,
   commit 89aacb513eb77549a29df2638913a0f8178cf3f5.