From 1484e65736f4cab27e5051e0f06be8470e69af82 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Mon, 4 Nov 2013 15:43:57 +0000 Subject: Define __STDC_IEC_559* based on __GCC_IEC_559*. --- include/stdc-predef.h | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/stdc-predef.h b/include/stdc-predef.h index b9c9967d9d..f8cb2cb97a 100644 --- a/include/stdc-predef.h +++ b/include/stdc-predef.h @@ -26,9 +26,28 @@ explicitly includes a system header. GCC knows the name of this header in order to preinclude it. */ -/* We do support the IEC 559 math functionality, real and complex. */ -#define __STDC_IEC_559__ 1 -#define __STDC_IEC_559_COMPLEX__ 1 +/* glibc's intent is to support the IEC 559 math functionality, real + and complex. If the GCC (4.9 and later) predefined macros + specifying compiler intent are available, use them to determine + whether the overall intent is to support these features; otherwise, + presume an older compiler has intent to support these features and + define these macros by default. */ + +#ifdef __GCC_IEC_559 +# if __GCC_IEC_559 > 0 +# define __STDC_IEC_559__ 1 +# endif +#else +# define __STDC_IEC_559__ 1 +#endif + +#ifdef __GCC_IEC_559_COMPLEX +# if __GCC_IEC_559_COMPLEX > 0 +# define __STDC_IEC_559_COMPLEX__ 1 +# endif +#else +# define __STDC_IEC_559_COMPLEX__ 1 +#endif /* wchar_t uses ISO/IEC 10646 (2nd ed., published 2011-03-15) / Unicode 6.0. */ -- cgit v1.2.1