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Add C2x BOOL_MAX and BOOL_WIDTH to limits.h.

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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.
This commit is contained in:
Joseph Myers 2020-08-19 22:46:41 +00:00
parent c08df688f2
commit e5baabf57b
1 changed files with 12 additions and 0 deletions
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12
include/limits.h
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@ -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>