[PATCH 1/3] powerpc64: make clang cross-build friendly

[Naveen N Rao]

On Sun, Nov 09, 2025 at 02:34:03AM +0530, Hari Bathini wrote:
> ARCH_USING_PATCHABLE_FUNCTION_ENTRY depends on toolchain support for
> -fpatchable-function-entry option. The current script that checks
> for this support only handles GCC. Rename the script and extend it
> to detect support for -fpatchable-function-entry with Clang as well,
> allowing clean cross-compilation with Clang toolchains.
> 
> Signed-off-by: Hari Bathini <hbathini at linux.ibm.com>
> ---
>  arch/powerpc/Kconfig                                         | 5 +++--
>  ...-function-entry.sh => check-fpatchable-function-entry.sh} | 0
>  2 files changed, 3 insertions(+), 2 deletions(-)
>  rename arch/powerpc/tools/{gcc-check-fpatchable-function-entry.sh => check-fpatchable-function-entry.sh} (100%)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 325c1171894d..dfb62e211c92 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -568,8 +568,9 @@ config ARCH_USING_PATCHABLE_FUNCTION_ENTRY
>  	depends on FUNCTION_TRACER && (PPC32 || PPC64_ELF_ABI_V2)
>  	depends on $(cc-option,-fpatchable-function-entry=2)
>  	def_bool y if PPC32
> -	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN
> -	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN
> +	def_bool $(success,$(srctree)/arch/powerpc/tools/check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN && CC_IS_GCC
> +	def_bool $(success,$(srctree)/arch/powerpc/tools/check-fpatchable-function-entry.sh $(CC) -target ppc64le -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN && CC_IS_CLANG

Can you instead pass $(CLANG_FLAGS) to retain the same command across 
gcc/clang?

- Naveen