File syslinux-4.04-gpxe-gcc15.patch of Package syslinux

--- a/gpxe/src/Makefile	2011-04-18 23:24:17.000000000 +0200
+++ b/gpxe/src/Makefile	2025-05-04 10:57:07.460410478 +0200
@@ -4,7 +4,7 @@
 #
 
 CLEANUP		:=
-CFLAGS		:=
+CFLAGS		:= -std=gnu11
 ASFLAGS		:=
 LDFLAGS		:=
 MAKEDEPS	:= Makefile