https://gitlab.com/apparmor/apparmor/-/commit/d8bb0435c2b283fe9eed2a6db9a0b09ac2566c0e
From d8bb0435c2b283fe9eed2a6db9a0b09ac2566c0e Mon Sep 17 00:00:00 2001
From: John Johansen <john@jjmx.net>
Date: Sun, 25 Feb 2024 03:31:01 +0000
Subject: [PATCH] Merge makefiles: test for support of flto-partition flag
--- a/configure.ac
+++ b/configure.ac
@@ -92,6 +92,13 @@ if test "$ac_cv_prog_cc_c99" = "no"; then
   AC_MSG_ERROR([C99 mode is required to build libapparmor])
 fi
 
+EXTRA_CFLAGS="-Wall ${EXTRA_WARNINGS} -fPIC"
+AX_CHECK_COMPILE_FLAG([-flto-partition=none], , , [-Werror])
+AS_VAR_IF([ax_cv_check_cflags__Werror__flto_partition_none], [yes],
+	[EXTRA_CFLAGS="$EXTRA_CFLAGS -flto-partition=none"]
+	,)
+AC_SUBST([AM_CFLAGS], ["$EXTRA_CFLAGS"])
+
 AC_OUTPUT(
 Makefile
 doc/Makefile
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -39,7 +39,6 @@ include $(COMMONDIR)/Make.rules
 BUILT_SOURCES = grammar.h scanner.h af_protos.h
 AM_LFLAGS = -v
 AM_YFLAGS = -d -p aalogparse_
-AM_CFLAGS = -Wall $(EXTRA_WARNINGS) -fPIC -flto-partition=none
 AM_CPPFLAGS = -D_GNU_SOURCE -I$(top_srcdir)/include/
 scanner.h: scanner.l
 	$(LEX) -v $<
-- 
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