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arch-arm*: add better support for gcc march extensions

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GCC has the ability to pass extensions to the march parameter, which
expand the funcationality of the march.  For example
"-march=armv7ve+simd" adds SIMD to ARMv7.  Currently, there is no way to
expand the march setting without modifying each instance, as you can't
guarantee the ordering when using the existing TUNE_CCARGS.  By
introducing two new variables, TUNE_CCARGS_MARCH and
TUNE_CCARGS_MARCH_OPT, we can enforce that these two go together.

Also, expand existing and create new feature files that use these
variables to expand the functionality.

(From OE-Core rev: 794eb617bfd1997e7a3498812c63a20c58a10554)

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Jon Mason
2021-08-18 22:52:20 -04:00
committed by Richard Purdie
parent a3c1be72af
commit ff0ea5633a
18 changed files with 37 additions and 27 deletions
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meta/conf/machine/include/arm/arch-arm.inc
+4
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@@ -14,3 +14,7 @@ TUNE_PKGARCH = "${ARMPKGARCH}${ARMPKGSFX_THUMB}${ARMPKGSFX_DSP}${ARMPKGSFX_EABI}
ABIEXTENSION = "eabi"
TARGET_FPU = "${@d.getVar('TUNE_CCARGS_MFLOAT') or 'soft'}"
# Some -march settings need a +X option passed in. Since we cannot guarantee that any specified TUNE_CCARGS option is set in any order, we must hard code the order here to allow for it.
TUNE_CCARGS_MARCH_OPTS ??= ""
TUNE_CCARGS .= "${TUNE_CCARGS_MARCH}${TUNE_CCARGS_MARCH_OPTS}"