syslinux: build with the target toolchain

Until now, the host toolchain was used to build syslinux, as it was
not possible to build a 32-bit syslinux with a x86-64 toolchain.

However, syslinux requires gnu-efi, and gnu-efi is built using the
target toolchain. Mixing different toolchains doesn't work well, so
this commit changes the syslinux package to use the target toolchain
for syslinux as well. This is made possible by patches
0003-Fix-ldlinux.elf-Not-enough-room-for-program-headers-.patch and
0004-memdisk-Force-ld-output-format-to-32-bits.patch.

Since syslinux also contains some utilities that have to run on the
host, those have to continue being built with the host toolchain,
which requires patch 0005-utils-Use-the-host-toolchain-to-build.patch.

Patch 0006-lzo-Use-the-host-toolchain-for-prepcore.patch is about
building prepcore, another utility with the host toolchain as it is
required at build-time.

This was tested using a Buildroot's built x86_64 toolchain, and
checked that the output binaries are 32-bits. It was tested as well if
they actually boot on hardware.

Signed-off-by: Benoît Allard <benoit.allard@greenbone.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/boot/syslinux/Config.in b/boot/syslinux/Config.in
index 6067e9ceb3..299a559fdf 100644
--- a/boot/syslinux/Config.in
+++ b/boot/syslinux/Config.in
@@ -1,12 +1,13 @@
 config BR2_TARGET_SYSLINUX
 	bool "syslinux"
 	depends on BR2_i386 || BR2_x86_64
-	select BR2_HOSTARCH_NEEDS_IA32_COMPILER
 	# Make sure at least one of the flavors is installed
 	select BR2_TARGET_SYSLINUX_ISOLINUX \
 		if !BR2_TARGET_SYSLINUX_PXELINUX && \
 		   !BR2_TARGET_SYSLINUX_MBR && \
 		   !BR2_TARGET_SYSLINUX_EFI
+	select BR2_PACKAGE_UTIL_LINUX
+	select BR2_PACKAGE_UTIL_LINUX_LIBUUID
 	help
 	  The syslinux bootloader for x86 systems.
 	  This includes: syslinux, pxelinux, extlinux.