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* [glibc] Add C2x BOOL_MAX and BOOL_WIDTH to limits.h.
@ 2020-08-19 22:46 Joseph Myers
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From: Joseph Myers @ 2020-08-19 22:46 UTC (permalink / raw)
To: glibc-cvs
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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