No subject

instead.


diff --git a/Makefile.am b/Makefile.am
index f5cef3f..7372a12 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -157,6 +157,8 @@ endif
 endif
 endif
 
+AM_CFLAGS = ${ac_extra_CFLAGS}
+
 rootbin_PROGRAMS = \
 	systemd \
 	systemctl \
diff --git a/configure.ac b/configure.ac
index a223b80..03bfb86 100644
--- a/configure.ac
+++ b/configure.ac
@@ -110,6 +110,7 @@ CC_CHECK_CFLAGS_APPEND([ \
         -fdata-sections \
         -Wl,--as-needed \
         -Wl,--gc-sections])
+AC_SUBST([ac_extra_CFLAGS])
 
 LT_PREREQ(2.2)
 LT_INIT
diff --git a/m4/attributes.m4 b/m4/attributes.m4
index 9d561c2..bb260d2 100644
--- a/m4/attributes.m4
+++ b/m4/attributes.m4
@@ -71,7 +71,7 @@ AC_DEFUN([CC_CHECK_CFLAG_APPEND], [
   )
 
   AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
-    [CFLAGS="$CFLAGS $1"; DEBUG_CFLAGS="$DEBUG_CFLAGS $1"; $2], [$3])
+    [ac_extra_CFLAGS="$ac_extra_CFLAGS $1"; DEBUG_CFLAGS="$DEBUG_CFLAGS $1"; $2], [$3])
 ])
 
 dnl CC_CHECK_CFLAGS_APPEND([FLAG1 FLAG2], [action-if-found], [action-if-not])