http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50694
--- Comment #3 from Oleg Endo <oleg.e...@t-online.de> 2011-10-18 21:33:06 UTC
---
(In reply to comment #2)
> Ah. One liner
>
> -#define DRIVER_SELF_SPECS "%{m2a:%{ml:%eSH2a does not support
> little-endian}}"
> +#define DRIVER_SELF_SPECS "%{m2a*:%{ml:%eSH2a does not support
> little-endian}}"
>
> should work.
Yep, does work.
However, I've noticed that it will stop working when the compiler's default
SH CPU and endian configuration is not -m1 -mb.
The code below instead gets the job done but I'm not sure whether it could
be written in a better way.
I've also noticed, that SH1 also supports big endian only, and -m1 -ml is
explicitly excluded in the multilib config in t-sh.
#if TARGET_ENDIAN_DEFAULT == MASK_BIG_ENDIAN
#define IS_LITTLE_ENDIAN_OPTION "%{ml:"
#else
#define IS_LITTLE_ENDIAN_OPTION "%{!mb:"
#endif
#if TARGET_CPU_DEFAULT == SELECT_SH1
#define UNSUPPORTED_SH1 IS_LITTLE_ENDIAN_OPTION \
"%{m1|!m2*:%{!m3*:%{!m4*:%{!m5*:%eSH1 does not support little-endian}}}}}"
#else
#define UNSUPPORTED_SH1 IS_LITTLE_ENDIAN_OPTION \
"%{m1:%eSH1 does not support little-endian}}"
#endif
#if TARGET_CPU_DEFAULT & MASK_HARD_SH2A
#define UNSUPPORTED_SH2A IS_LITTLE_ENDIAN_OPTION \
"%{m2a*|!m1:%{!m2*:%{!m3*:%{!m4*:{!m5*:%eSH2a does not support
little-endian}}}}}}"
#else
#define UNSUPPORTED_SH2A IS_LITTLE_ENDIAN_OPTION \
"%{m2a*:%eSH2a does not support little-endian}}"
#endif
#define DRIVER_SELF_SPECS UNSUPPORTED_SH1, UNSUPPORTED_SH2A
Actually, SH2E also supports big endian only as per public specification.
But I don't think that it would cause any trouble for anyone. Of course it
could be excluded as well. :)
