syslinux: Fix build with glibc >= 2.28

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

lfs/syslinux

@@ -75,6 +75,9 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 	@$(PREBUILD)
 	@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar axf $(DIR_DL)/$(DL_FILE)
 
+	# Apply patches
+	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/syslinux-6.03-sysmacros.patch
+
 	# Build
 	cd $(DIR_APP) && make bios $(MAKETUNING)
 ifeq "$(BUILD_ARCH)" "x86_64"

src/patches/syslinux-6.03-sysmacros.patch

@@ -0,0 +1,34 @@
+https://bugs.gentoo.org/579928
+
+From d84db34dbe39d55b4d7e868764c056689aa0793b Mon Sep 17 00:00:00 2001
+From: Mike Frysinger <vapier@gentoo.org>
+Date: Tue, 19 Apr 2016 01:56:41 -0400
+Subject: [PATCH] extlinux: pull in sys/sysmacros.h for major/minor/makedev
+
+These functions are defined in sys/sysmacros.h, so add the include to
+main.c.  This is already handled correctly in mountinfo.c.  Otherwise
+we get build failures like:
+
+main.o: In function 'find_device_sysfs':
+extlinux/main.c:1131: undefined reference to 'minor'
+
+Signed-off-by: Mike Frysinger <vapier@gentoo.org>
+---
+ extlinux/main.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/extlinux/main.c b/extlinux/main.c
+index a7ebd49..ebff7ea 100644
+--- a/extlinux/main.c
++++ b/extlinux/main.c
+@@ -38,6 +38,7 @@
+ #include <sysexits.h>
+ #include <sys/ioctl.h>
+ #include <sys/stat.h>
++#include <sys/sysmacros.h>
+ #include <sys/types.h>
+ #include <sys/mount.h>
+ #include <sys/vfs.h>
+-- 
+2.7.4
+