6b47aefa31
Even though it is deprecated in GCC 6 [1] it has not yet been removed from gcc upstream. We do have active machines in OE ecosystem which use armv4 ( SA11xx ) e.g. collie in meta-handheld so until upstream gcc takes next step to remove them lets support armv4 again, we are still carrying the relevant gcc patch to support v4 BX fix. [1] https://gcc.gnu.org/gcc-6/changes.html#arm (From OE-Core rev: dea9b6c3fd62ec5ea8f12fcb9bf44870379c6f4b) Signed-off-by: Khem Raj <raj.khem@gmail.com> Cc: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2012/03/30 - Mark Hatle mark.hatle@windriver.com
- Initial Revision
The ARM architecture definitions are split among a number of files. The primary definitions for the variables are handled by the core arch-arm.inc file.
TUNE_ARCH is set to either "arm" or "armeb" depending on the value of the existence of the "bigendian" feature in a given tune.
A small set of ARM specific variables have been defined to allow TUNE_PKGARCH to be automatically defined. Optimized tunings must NOT change the definiton of TUNE_PKGARCH. TUNE_PKGACH_tune- will be ignored. The format of the package arch is enforced by the TUNE_PKGARCH default. The format must be of the form: [t][e][hf][b][-vfp][-neon]
TUNE_PKGARCH is defined as: ${ARMPKGARCH}${ARMPKGSFX_THUMB}${ARMPKGSFX_DSP}${ARMPKGSFX_EABI}${ARMPKGSFX_ENDIAN}${ARMPKGSFX_FPU}
ARMPKGARCH - This is the core package arch component specified by each tuning. This is the primary identifier of a tuning. Usual values are: arm, armv4, armv5, armv6, armv7a, etc.
ARMPKGSFX_THUMB - This is the thumb specific suffix. Curently it is defined in feature-arm-thumb.inc.
ARMPKGSFX_DSP - This is the DSP specific suffix. Currently this is set to 'e' when on armv5 and the dsp feature is enabled.
ARMPKGSFX_EABI - This is the eabi specific suffix. There are currently
two defined ABIs specificed, standard EABI and Hard Float (VFP) EABI.
When the callconvention-hard is enabled, "hf" is specified, otherwise it
is blank.
ARMPKGSFX_ENDIAN - This is the endian specific suffix. It is defined in the core arch-arm.inc file.
ARMPKGSFX_FPU - This is the FPU specific suffix. The suffix indicates specific FPU optimizations. 'vfp' and 'neon' are both defined.