SPU build break (Re: [PATCH v2] math: guard BSD finite/isinf/isnan functions properly in math.h)

Ulrich Weigand uweigand@de.ibm.com
Wed Apr 6 13:56:00 GMT 2016

Yaakov Selkowitz wrote:

> diff --git a/newlib/libc/include/ieeefp.h b/newlib/libc/include/ieeefp.h
> index 2ffa456..2c04284 100644
> --- a/newlib/libc/include/ieeefp.h
> +++ b/newlib/libc/include/ieeefp.h
> @@ -241,19 +241,6 @@ typedef int fp_rdi;
>  fp_rdi _EXFUN(fpgetroundtoi,(void));
>  fp_rdi _EXFUN(fpsetroundtoi,(fp_rdi));
> -#undef isnan
> -#undef isinf
> -
> -int _EXFUN(isnan, (double));
> -int _EXFUN(isinf, (double));
> -int _EXFUN(finite, (double));

It seems this caused a build break on SPU:

newlib/libm/common/s_isinf.c:17:9: error: expected identifier or '(' before 'sizeof'
 _DEFUN (isinf, (x),
newlib/libm/common/s_isinf.c:17:9: error: expected ')' before '?' token
 _DEFUN (isinf, (x),
because the SPU-specific #define of isinf from machine/ieeefp.h is still visible.

Since common/s_isinf.c includes <ieeefp.h>, it seems this wasn't a problem in
the past because of the above #undef that your patch removed.

Should the #undef now move somewhere else, e.g. into s_isinf.c (and presumably
s_isnan.c as well)?


  Dr. Ulrich Weigand
  GNU/Linux compilers and toolchain

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