buildroot/arch, branch 2016.08

bfin: change default to bf532, internal toolchain !bf6xx

2016-08-27T21:07:11+00:00

The default Blackfin processor in Buildroot isn't supported by gcc 6.1.0, so use bf532 as default. Disable any bf6xx processors for internal toolchain users. Signed-off-by: Waldemar Brodkorb Signed-off-by: Thomas Petazzoni

m68k: disable BR2_BINFMT_FLAT_SEP_DATA for coldfire

2016-08-22T22:08:13+00:00

BR2_BINFMT_FLAT_SEP_DATA can be used to create XIP userland and works fine for m68k. Unfortunately a lot of basic packages as pcre are not compileable because of a CPU or hardware limitation. The reason for failing are very big functions used in the libraries or application code. Typical errors are: Fatal error: Tried to convert PC relative branch to absolute jump or error: value -yyyyy out of range Add kernel patch from 4ec5542679264bc06a0356ef92f06ad7a0abe06d to make BR2_BINFMT_FLAT_ONE compiled firmware work fine. Fixes: http://autobuild.buildroot.net/results/20b/20b1586757450d6aad8583ad7a787a7ca11acef1/ http://autobuild.buildroot.net/results/d31/d311955ada1ffcd7f69e82965c8fe33eabe488cd/ Signed-off-by: Waldemar Brodkorb [Thomas: add comment in Config.in file about sep-data existing on m68k, but being disabled due to build issues with numerous packages.] Signed-off-by: Thomas Petazzoni

m68k: flat one memory region works with small kernel patch

2016-08-22T22:05:37+00:00

Greg Ungerer fixed recently a bug in the Linux kernel, which allows to use one memory region again. Signed-off-by: Waldemar Brodkorb [Thomas: cherry-picked from next to master, in order to be able to use BR2_BINFMT_FLAT_ONE by default on m68k, since BR2_BINFMT_FLAT_SEP_DATA causes too much problems.] Signed-off-by: Peter Korsgaard

arch: define dependencies for the binfmt flat formats

2016-07-05T07:48:19+00:00

The situation looks like following for elf2flt and binfmt FLAT: * Only gcc for bfin/m68k implements -msep-data (BR2_BINFMT_FLAT_SEP_DATA) and -mid-shared-library (BR2_BINFMT_FLAT_SHARED), so the corresponding options are made only visible on those architectures. * When the default of BR2_BINFMT_FLAT_ONE is used on m68k, broken binaries are produced, which mainly end up in SIGILL, so do not use it for m68k. Signed-off-by: Waldemar Brodkorb [Thomas: - also add the dependencies on m68k/bfin to BR2_BINFMT_FLAT_SHARED - rework commit log.] Signed-off-by: Thomas Petazzoni

m68k: remove BR2_GCC_TARGET_ARCH

2016-06-07T11:11:59+00:00

Setting BR2_GCC_TARGET_ARCH is possible, but breaks external toolchain users. m68k/cf defconfigs just working without it. Reported-by: Thomas Petazzoni Signed-off-by: Waldemar Brodkorb Signed-off-by: Thomas Petazzoni

toolchain: add coldfire support

2016-04-30T16:50:46+00:00

Add support for m68k/coldfire. A gcc patch is required to avoid gcc ICE. Signed-off-by: Waldemar Brodkorb Signed-off-by: Thomas Petazzoni

i386: properly define BR2_ARCH for all x86 subarchitectures

2016-04-21T21:05:28+00:00

We were not defining BR2_ARCH for two of the x86 subarchitecture, which means the architecture part of the GNU_TARGET_NAME tuple was empty, leading to weird build failures. This commit fixes that by defining the appropriate values. Fixes bug #8861. Signed-off-by: Thomas Petazzoni Reviewed-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni

arch/x86: remove support for i386

2016-04-18T21:38:34+00:00

The Linux kernel doesn't even support i386 anymore, there is no NPTL support for i386 and uClibc-ng only supports NPTL on x86, so there is essentially no usable thread implementation. Most likely glibc and musl also don't support i386 either. So it's time to remove the support for this architecture variant. Signed-off-by: Thomas Petazzoni Reviewed-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni

arch/arm: add Cortex-M4 entry

2016-03-20T14:37:30+00:00

This commit adds the option to select the Cortex-M4 ARM core, in the same family as Cortex-M3. This will be useful to enable the internal toolchain backend for this ARM core, and provide some defconfigs for Cortex-M4 platforms. Signed-off-by: Thomas Petazzoni Reviewed-by: Arnout Vandecappelle (Essensium/Mind) Reviewed-by: "Yann E. MORIN" Signed-off-by: Thomas Petazzoni

arch/arm: Cortex-M3 provides only Thumb-2

2016-03-20T14:37:24+00:00

The Cortex-M cores only support Thumb-2, not Thumb. In fact, Thumb-2 is a superset of Thumb, and we could have a single option for both in Buildroot, since -mthumb on ARMv4/v5 means original Thumb, while -mthumb on ARMv7 means Thumb 2. However, for clarity, it makes sense to have two separate options. But in this case, Cortex-M3 should not advertise that it supports Thumb, as in fact selecting Thumb would generate Thumb-2 code. Signed-off-by: Thomas Petazzoni Reviewed-by: "Yann E. MORIN" Reviewed-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni