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| author |   Marek Behún <kabel@kernel.org> | 2022-08-18 20:01:58 +0200 |
|---|---|---|
| committer |   Sam James <sam@gentoo.org> | 2022-08-23 06:23:56 +0100 |
| commit | e61ffcd622d34570b294e7f4a3e922bdc980cd65 (patch) | |
| tree | bdbcca5c58654dd7409e4427d5c6f6bacf3bd13e | |
| parent | profiles: Remove masks blocking mjo's packages (diff) | |
| download | gentoo-e61ffcd6.tar.gz gentoo-e61ffcd6.tar.bz2 gentoo-e61ffcd6.zip | |
toolchain.eclass: build multilibs for ARM's A, R and M architecture profiles
For ARM targets, with USE=multilib and with CTARGET that does not imply
any of --with-arch, --with-cpu, --with-mode or --with-float options to
gcc's configuration (when arm_arch=arm), pass option
--with-multilib-list=aprofile,rmprofile to gcc's configuration to make
it build multilibs for A, R and M architecture profiles.
This makes it possible to have one compiler capable of generating
correct code (linking correct libgcc/CRT) for various ARM targets: from
armv6 to armv7, for both soft float and half float, for various FPU
types.
Example of arm-none-eabi-gcc -print-libgcc-file-name output for various
options:
default:
/usr/lib/gcc/arm-none-eabi/12.1.1/libgcc.a
-mcpu=cortex-m0
/usr/lib/gcc/arm-none-eabi/12.1.1/thumb/v6-m/nofp/libgcc.a
-march=armv7-m
/usr/lib/gcc/arm-none-eabi/12.1.1/thumb/v7-m/nofp/libgcc.a
-march=armv7-a
/usr/lib/gcc/arm-none-eabi/12.1.1/thumb/v7-a/nofp/libgcc.a
-march=armv7-a -mhard-float -mfpu=neon
/usr/lib/gcc/arm-none-eabi/12.1.1/thumb/v7-a+simd/hard/libgcc.a
-march=armv7-a -mhard-float -mfpu=vfp
/usr/lib/gcc/arm-none-eabi/12.1.1/thumb/v7-a+fp/hard/libgcc.a
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Sam James <sam@gentoo.org>
| -rw-r--r-- | eclass/toolchain.eclass | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass index ed473e0c626f..29076efc3f54 100644 --- a/eclass/toolchain.eclass +++ b/eclass/toolchain.eclass @@ -1213,6 +1213,17 @@ toolchain_src_configure() { armv7*) confgcc+=( --with-fpu=vfpv3-d16 ) ;; esac fi + + # If multilib is used, make the compiler build multilibs + # for A or R and M architecture profiles. Do this only + # when no specific arch/mode/float is specified, e.g. + # for target arm-none-eabi, since doing this is + # incompatible with --with-arch/cpu/float/fpu. + if is_multilib && [[ ${arm_arch} == arm ]] && \ + tc_version_is_at_least 7.1 + then + confgcc+=( --with-multilib-list=aprofile,rmprofile ) + fi ;; mips) # Add --with-abi flags to set default ABI |