Le 20/02/2023 à 07:00, Michael Ellerman a écrit :

Christophe Leroy [off-list ref] writes:

quoted

cpu-as-y is there to force assembler building options.
But there is no need for that. Gcc is passed the necessary
options and it automatically pass the appropriate option to
GAS.

GCC is given -maltivec when relevant, so no need
for -Wa,-maltivec in addition

And -Wa,-many is wrong as it will hide innapropriate
instructions. Better to detect them and handle them on a
case by case basis.
-Wa,-many was added by commit 960e30029863 ("powerpc/Makefile:
Fix PPC_BOOK3S_64 ASFLAGS") in order to fix an issue with
clang and the passed -Wa,-mpower4 option. But we have now
removed it expecting the compiler to automatically pass the
proper options and instructions based on -mcpu=power4

I wanted to apply this one, but it caused a lot of breakage for big
endian Book3S-64 builds - where we build for power4 but have lots of
code that uses >= power5 instructions.

I'll try and get those all fixed and pick this up for the next merge
window.

ping ?