buildroot/toolchain, branch 2017.08

toolchain/buildroot: not available for a few mips cores

2017-08-29T21:18:56+00:00

Commit 1b974425 (MIPS: add support for M6201 cores) explained that the new core was not supported by upstream gcc, and as of gcc-8-trunk that's still the case. Ditto for 3cfbeb83 (MIPS: add support for P6600 cores). This means that we currently allow to build an internal tolchain for those cores, yet we have no suitable gcc version. Disable the internal backend in this case. Signed-off-by: "Yann E. MORIN" Cc: Vicente Olivert Riera Cc: Thomas Petazzoni Signed-off-by: Thomas Petazzoni

core/pkg-toolchain-external: quiesce spurious stderr

2017-08-19T13:06:45+00:00

Since 392b0a26f5 (toolchain-external: default BR2_TOOLCHAIN_EXTERNAL_PATH to empty), calling 'make clean' or similar can yield a spurious stderr message: dirname: missing operand Try 'dirname --help' for more information. Which is definitely baffling and unsettling... It turns out that it is pretty trivial to reproduce, and this defconfig is just enough: $ cat my-defconfig BR2_TOOLCHAIN_EXTERNAL=y $ make BR2_DEFCONFIG=$(pwd)/my-defconfig defconfig $ make clean dirname: missing operand Try 'dirname --help' for more information. [--snip--] This is because the cross-compiler is not found in the PATH (and for good reasons, I don't have it in the PATH, not even at all). So, when the cross-compiler is not found in the path, we simply continue as if all was good, and postpone the check to much later, when we try to copy the toolchain libs... So, use a make construct rather than calling to the shell: $(dir ...) does not whine if passed nothing. Signed-off-by: "Yann E. MORIN" Cc: Arnout Vandecappelle Cc: Thomas Petazzoni Cc: Thomas De Schampheleire Reviewed-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni

arch/arm: add big.LITTLE cpu variants

2017-07-22T21:29:24+00:00

The big.LITTLE configurations can be optimised for by gcc, and a few users wonder what they should choose when they have such CPUs. Add new entries for those big.LITTLE configurations. Note: the various combos were added in various gcc versions, but only really worked in later versions: Variant | Introduced in | First built in ----------+---------------+---------------- a15-a7 | 4.9 | 4.9 a17-a7 | 5 | 5 a57-a53 | 4.9 | 6 a72-a53 | 5 | 6 Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Cc: Thomas De Schampheleire Cc: Baruch Siach Signed-off-by: Thomas Petazzoni

arch/mips: add option for toolchains supporting -mfpxx

2017-07-21T20:49:18+00:00

-mfpxx option was added in gcc-5.1.0 so make sure that users cannot select the "xx" fp32 mode when using toolchains that have a gcc older than 5.1.0. -mfp32 and -mfp64 were added in gcc-4.1.0, so given the older gcc version we support in Buildroot (in the GCC_AT_LEAST options) is 4.3 we don't need to do anything else for them. Signed-off-by: Vicente Olivert Riera Signed-off-by: Thomas Petazzoni

arch/mips: add option for toolchains supporting -mnan

2017-07-21T20:48:51+00:00

-mnan option was added in gcc-4.9.0 so make sure that users cannot select the NaN mode when using toolchains that have a gcc older than 4.9.0, and also make sure that the -mnan option is not passed at all to the toolchain-wrapper and target cflags. Signed-off-by: Vicente Olivert Riera Signed-off-by: Thomas Petazzoni

arch/mips: add support for MIPS32 FP mode

2017-07-16T14:45:22+00:00

MIPS32 support different FP modes (32,xx,64), so give the user the opportunity to choose between them. That will cause host-gcc to be built using the --with-fp-32=[32|xx|64] configure option. Also the -mfp[32|xx|64] gcc option will be added to TARGET_CFLAGS and to the toolchain wrapper. FP mode option shouldn't be used for soft-float, so we add logic in the toolchain wrapper if -msoft-float is among the arguments in order to not append the -fp[[32|xx|64] option, otherwise the compilation may fail. Information about FP modes here: - https://sourceware.org/binutils/docs/as/MIPS-Options.html - https://dmz-portal.imgtec.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking#5._Generating_modeless_code Signed-off-by: Vicente Olivert Riera Signed-off-by: Thomas Petazzoni

arch/mips: add support for MIPS NaN

2017-07-16T14:35:39+00:00

MIPS supports two different NaN encodings, legacy and 2008. Information about MIPS NaN encodings can be found here: https://sourceware.org/binutils/docs/as/MIPS-NaN-Encodings.html NaN legacy is the only option available for R2 cores and older. NaN 2008 is the only option available for R6 cores. R5 cores can have either NaN legacy or NaN 2008, depending on the implementation. So, if the user selects a generic R5 target architecture variant, we show a choice menu with both options available. For well known R5 cores we directly select the NaN enconding they use. Signed-off-by: Vicente Olivert Riera Signed-off-by: Thomas Petazzoni

toolchain-external: default BR2_TOOLCHAIN_EXTERNAL_PATH to empty

2017-07-10T16:03:13+00:00

It makes no sense to default to an arbitrary path. In addition, it in fact works correctly when it is empty. In that case, the toolchain will be searched in PATH. Update the help text to explain the above, and also that the compiler is supposed to be in the bin subdirectory. Signed-off-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni

toolchain-wrapper: remove remaining references to HOST_DIR/usr

2017-07-10T15:46:11+00:00

Commit 14151d77af20ec50eeba6e30465debf87b35faaa that eliminated $(HOST_DIR)/usr seriously missed the toolchain-wrapper - only a single reference was updated, the other three were missed. Commit 015d68c84c9c6ad6f6d41f181d19d813f309088b removed one more. This commit finally removes the two remaining ones. Signed-off-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni

toolchain: add 4.12.x choice for headers

2017-07-08T13:56:30+00:00

Signed-off-by: Joel Stanley Signed-off-by: Peter Korsgaard