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From: Joseph Myers <jsm28@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] Add C2x BOOL_MAX and BOOL_WIDTH to limits.h. Date: Wed, 19 Aug 2020 22:46:57 +0000 (GMT) [thread overview] Message-ID: <20200819224657.DF9753857C5A@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e5baabf57b1f6bcaf60068b3fd24af649e4e91c6 commit e5baabf57b1f6bcaf60068b3fd24af649e4e91c6 Author: Joseph Myers <joseph@codesourcery.com> Date: Wed Aug 19 22:46:41 2020 +0000 Add C2x BOOL_MAX and BOOL_WIDTH to limits.h. C2x adds BOOL_MAX and BOOL_WIDTH macros to <limits.h>. This patch adds them to glibc's <limits.h> for the case when they aren't defined by GCC's <limits.h>. Tested for x86_64. Diff: --- include/limits.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/limits.h b/include/limits.h index 8195da78a4..29e9b943b9 100644 --- a/include/limits.h +++ b/include/limits.h @@ -178,6 +178,18 @@ # endif #endif /* Use IEC_60559_BFP_EXT. */ +/* The macros for _Bool are not defined by GCC's <limits.h> before GCC + 11, or if _GNU_SOURCE is defined rather than enabling C2x support + with -std. */ +#if __GLIBC_USE (ISOC2X) +# ifndef BOOL_MAX +# define BOOL_MAX 1 +# endif +# ifndef BOOL_WIDTH +# define BOOL_WIDTH 1 +# endif +#endif + #ifdef __USE_POSIX /* POSIX adds things to <limits.h>. */ # include <bits/posix1_lim.h>
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