coreboot-kgpe-d16/util/crossgcc
Paul Kocialkowski 7899db2355 buildgcc: Never set GMP CFLAGS manually in order to get the right flags
When no CFLAGS are explicitly provided to it, the GMP configure script
will figure out the best optimization flags to use on its own. In
particular, it will setup the march, mfpu and mtune flags based on
hardware detection.

However, when CFLAGS are provided, they are used as-is and such
detection doesn't happen. When the march, mfpu and mtune flags are not
provided (which happens when GMP wasn't built already), not only will
related optimizations be disabled, but some code might not build because
of missing support. This happens with NEON instructions on ARMv7 hosts.

Thus, it is better not to set CFLAGS and leave it up to the GMP
configure script to get them right and still reuse those later.

Change-Id: I6ffcbac1298523d1b8ddf29a8bca1b00298828a7
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: https://review.coreboot.org/15452
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
2016-07-21 11:49:25 +02:00
..
patches buildgcc: Update to binutils-2.26.1 & Fix aarch64 build issue 2016-07-14 23:58:56 +02:00
sum buildgcc: Update to binutils-2.26.1 & Fix aarch64 build issue 2016-07-14 23:58:56 +02:00
Makefile crossgcc: Switch POWER8 to big endian mode 2016-03-24 18:32:23 +01:00
Makefile.inc crossgcc/Makefile.inc: Update jenkins-build-toolchain 2016-04-20 00:24:47 +02:00
README Remove empty lines at end of file 2015-06-08 00:55:07 +02:00
buildgcc buildgcc: Never set GMP CFLAGS manually in order to get the right flags 2016-07-21 11:49:25 +02:00
getopt.c Add the BSD-licensed getopt tool to crossgcc, to use 2010-01-29 17:40:52 +00:00

README

README
------

This is a cross toolchain builder for -elf toolchains (ie. no libc support)

known working:
  i386-elf
  x86_64-elf
  powerpc-elf
  mipsel-elf
  arm-elf
  armv7a-eabi
  aarch64-elf

known broken:
  alpha-elf
  powerpc64-elf