On 2019-06-25 15:36 +0200, J.W. Jagersma wrote:
> Say I have a header which defines a type conditionally based on the
> __SSE__ macro:
>
> #ifdef __SSE__
> struct X { ... };
> #else
> struct X { ... };
> #endif
>
> This header is included in multiple compilation units, some of which are
> compiled with -mgeneral-regs-only. I don't want any fpu/simd code there.
> Now this flag also undefines __SSE__, which I suppose makes sense, but
> it breaks the ABI between translation units.
> Is there some way to avoid generating fpu code without affecting
> preprocessor macros?
How about just "pretend" to have __SSE__?
cat > test.c << EOF
#ifndef __SSE__
#error
#endif
int main(){}
EOF
gcc test.c -mgeneral-regs-only -D__SSE__
--
Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University
