[Buildroot] [PATCH v4 1/1] syslinux: build with the target toolchain

Benoît Allard benoit.allard at greenbone.net
Fri Apr 7 08:06:30 UTC 2017


On Thu, 6 Apr 2017 17:13:23 +0200
Thomas Petazzoni <thomas.petazzoni at free-electrons.com> wrote:

> Hello,
> 
> On Thu,  6 Apr 2017 12:04:46 +0200, Benoît Allard wrote:
> > 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.
> > 
> > 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 at greenbone.net>
> 
> Thanks, this now builds fine. However, in output/host/usr/bin, I still
> have a program built with the target toolchain:
> 
> $ file output/host/usr/bin/syslinux
> output/host/usr/bin/syslinux: ELF 64-bit LSB executable, x86-64,
> version 1 (SYSV), dynamically linked,
> interpreter /lib/ld-musl-x86_64.so.1, not stripped
> 
> See the /lib/ld-musl-x86_64 interpreter? This means it has been built
> against the musl C library, and therefore with the target toolchain.
> 
> What is this program useful for?

As I understand it, this is an "installer" you should run on the target
machine in order to install the syslinux bootloader. There should be (?)
another one "extlinux" next to it that is suitable for installing the
bootloader on an ext2 (4?) filesystem (that is the binary that has
dependency on libuuid).

Regards,
Ben.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 473 bytes
Desc: OpenPGP digital signature
URL: <http://lists.busybox.net/pipermail/buildroot/attachments/20170407/22533656/attachment-0002.asc>


More information about the buildroot mailing list