new file mode 100644
@@ -0,0 +1,60 @@
+From 9497112ff28f87ca3c12ca2191e64cdacc5bf8d6 Mon Sep 17 00:00:00 2001
+From: Carlos Santos <casantos@datacom.ind.br>
+Date: Sat, 30 Sep 2017 19:49:55 -0300
+Subject: [PATCH] extlinux: Use the host toolchain to build.
+
+It is meant to run on the host machine, hence must be built using the
+host toolchain.
+
+Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
+---
+ extlinux/Makefile | 13 ++++++-------
+ 1 file changed, 6 insertions(+), 7 deletions(-)
+
+diff --git a/extlinux/Makefile b/extlinux/Makefile
+index 1721ee54..5c4baa5a 100644
+--- a/extlinux/Makefile
++++ b/extlinux/Makefile
+@@ -18,16 +18,15 @@ include $(MAKEDIR)/syslinux.mk
+
+ OPTFLAGS = -g -Os
+ INCLUDES = -I$(SRC) -I$(objdir) -I$(SRC)/../libinstaller
+-CFLAGS = $(GCCWARN) -Wno-sign-compare -D_FILE_OFFSET_BITS=64 \
++CFLAGS = $(CFLAGS_FOR_BUILD) $(GCCWARN) -Wno-sign-compare -D_FILE_OFFSET_BITS=64 \
+ $(OPTFLAGS) $(INCLUDES)
+-LDFLAGS =
++LDFLAGS = $(LDFLAGS_FOR_BUILD)
+
+ SRCS = main.c \
+ mountinfo.c \
+ ../libinstaller/syslxmod.c \
+ ../libinstaller/syslxopt.c \
+ ../libinstaller/syslxcom.c \
+- ../libinstaller/syslxrw.c \
+ ../libinstaller/setadv.c \
+ ../libinstaller/advio.c \
+ ../libinstaller/bootsect_bin.c \
+@@ -53,16 +52,16 @@ spotless: clean
+ installer: extlinux
+
+ extlinux: $(OBJS)
+- $(CC) $(LDFLAGS) -o $@ $^
++ $(CC_FOR_BUILD) $(LDFLAGS) -o $@ $^
+
+ strip:
+ $(STRIP) extlinux
+
+ %.o: %.c
+- $(CC) $(UMAKEDEPS) $(CFLAGS) -c -o $@ $<
++ $(CC_FOR_BUILD) $(UMAKEDEPS) $(CFLAGS) -c -o $@ $<
+ %.i: %.c
+- $(CC) $(UMAKEDEPS) $(CFLAGS) -E -o $@ $<
++ $(CC_FOR_BUILD) $(UMAKEDEPS) $(CFLAGS) -E -o $@ $<
+ %.s: %.c
+- $(CC) $(UMAKEDEPS) $(CFLAGS) -S -o $@ $<
++ $(CC_FOR_BUILD) $(UMAKEDEPS) $(CFLAGS) -S -o $@ $<
+
+ -include .*.d
+--
+2.13.5
+
Like the utilities, it is meant to run on the host machine, hence must be built using the host toolchain. Signed-off-by: Carlos Santos <casantos@datacom.ind.br> --- Tested with the following defconfig: BR2_x86_64=y BR2_x86_atom=y BR2_DL_DIR="$(HOME)/src" BR2_TOOLCHAIN_EXTERNAL=y BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/br-x86-64-core2-full-2017.05-1078-g95b1dae.tar.bz2" BR2_TOOLCHAIN_EXTERNAL_GCC_6=y BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_4=y BR2_TOOLCHAIN_EXTERNAL_LOCALE=y BR2_TOOLCHAIN_EXTERNAL_CXX=y BR2_TARGET_GENERIC_ROOT_PASSWD="root" BR2_TARGET_GENERIC_GETTY_PORT="ttyS1" BR2_ENABLE_LOCALE_WHITELIST="" BR2_ROOTFS_OVERLAY="board/technologic/ts5x00/fs-overlay" BR2_LINUX_KERNEL=y BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/pc/linux.config" BR2_LINUX_KERNEL_INSTALL_TARGET=y BR2_TARGET_ROOTFS_EXT2=y BR2_TARGET_ROOTFS_EXT2_4=y BR2_TARGET_SYSLINUX=y BR2_TARGET_SYSLINUX_MBR=y BR2_TARGET_SYSLINUX_EFI=y Notice that I did not actualy use a ts5x00 board, just used its defconfig as a base to create my configuration. --- ...-extlinux-Use-the-host-toolchain-to-build.patch | 60 ++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 boot/syslinux/0011-extlinux-Use-the-host-toolchain-to-build.patch