24 Feb
2022
24 Feb
'22
5:12 p.m.
On Thu, Feb 24, 2022 at 03:05:28PM +1000, Nicholas Piggin wrote:
- gcc 10 started to emit a .machine directive at the beginning of generated
- .s files, which overrides assembler -Wa,-m<cpu> options passed down.
- Unclear if this behaviour will be reverted.
It will not be reverted. If you need a certain .machine for some asm code, you should write just that!
+#ifdef CONFIG_CC_IS_GCC +#if (GCC_VERSION >= 100000) +#if (CONFIG_AS_VERSION == 23800) +asm(".machine any"); +#endif +#endif +#endif +#endif /* __ASSEMBLY__ */
Abusing toplevel asm like this is broken and you *will* end up with unhappiness all around.
Segher