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switch-coreboot/util/crossgcc
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Nico Huber 9718834ac5 UPSTREAM: buildgcc: Add option to bootstrap a host gcc 
Bootstrapping gcc is the recommended way if your host gcc's version
doesn't match the gcc version you're going to build. While a build
with an outdated host gcc usually succeeds, an outdated gnat seems
to be a bigger issue.

v3: Some library controversy: gcc likes the libraries it ships with
most but we don't want to install shared libraries. So we build
them static --disable-shared) and install only the minimum
(libgcc, libada, libstdc++). However, as the code of these
libraries might be used to build a shared library we have to
compile them with `-fPIC`.

v4: o Updated getopt strings.
o The workaround for clang (-fbracket-depth=1024) isn't needed
for bootstrapping and also breaks the build, as clang is only
used for the first stage in that case and gcc doesn't know
that option.

So far build tested with `make BUILDGCC_OPTIONS="-b -l c,ada"` on
o Ubuntu 14.04 "Trusty Tahr" (i386)
o Debian 8 "Jessie" (x86_64) (building python (-S) works too)
o current Arch Linux (x86_64)
o FreeBSD 10.3 (x86_64) (with gcc-aux package)

and with clang host compiler, thus C only: `make BUILDGCC_OPTIONS="-b"`
on
o Debian 8 "Jessie" (x86_64)
o FreeBSD 10.3 (x86_64)

v5: Rebased after toolchain updates to GCC 5.3.0 etc.

Build tested with `make BUILDGCC_OPTIONS="-b -l c,ada"` on
o Debian 8 "Jessie" (x86_64)

BUG=None
BRANCH=None
TEST=None

Change-Id: Icb47d3e9dbafc55737fbc3ce62a084fb9d5f359a
Original-Signed-off-by: Nico Huber <nico.huber@secunet.com>
Original-Reviewed-on: https://review.coreboot.org/13473
Original-Tested-by: build bot (Jenkins)
Original-Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/358602
Reviewed-by: Martin Roth <martinroth@chromium.org>
2016-07-07 01:09:46 -07:00
..
patches buildgcc: Update gdb and expat 2016-05-04 20:21:29 +02:00
sum buildgcc: Update Python to 3.5.1 2016-05-04 20:40:57 +02:00
buildgcc UPSTREAM: buildgcc: Add option to bootstrap a host gcc 2016-07-07 01:09:46 -07:00
getopt.c Add the BSD-licensed getopt tool to crossgcc, to use 2010-01-29 17:40:52 +00:00
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

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