Hi, This patch adds the support for pacbti multlilib linking by making "-mbranch-protection=none" as default multilib option for arm-none-eabi target.
Eg 1.
If the passed command line flags are (without mbranch-protection):
a) -march=armv8.1-m.main+mve -mfloat-abi=hard -mfpu=auto
"-mbranch-protection=none" will be used in the multilib matching.
Eg 2.
If the passed command line flags are (with mbranch-protection):
a) -march=armv8.1-m.main+mve+pacbti -mfloat-abi=hard -mfpu=auto
-mbranch-protection=pac-ret
"-mbranch-protection=standard" will be used in the multilib matching.
Regression tested on arm-none-eabi and bootstrapped on arm-none-linux-gnueabihf.
Ok for master?
Regards,
Srinath.
gcc/ChangeLog:
2023-01-11 Srinath Parvathaneni <srinath.parvathan...@arm.com>
* config.gcc ($tm_file): Update variable.
* config/arm/arm-mlib.h: Create new header file.
* config/arm/t-rmprofile (MULTI_ARCH_DIRS_RM): Rename mbranch-protection
multilib arch directory.
(MULTILIB_REUSE): Add multilib reuse rules.
(MULTILIB_MATCHES): Add multilib match rules.
gcc/testsuite/ChangeLog:
2023-01-11 Srinath Parvathaneni <srinath.parvathan...@arm.com>
* gcc.target/arm/multilib.exp (multilib_config "rmprofile"): Update
tests.
* gcc.target/arm/pac-12.c: New test.
* gcc.target/arm/pac-13.c: Likewise.
* gcc.target/arm/pac-14.c: Likewise.
multilib_pacbti
Description: multilib_pacbti
