* doc/posix-headers/limits.texi (limits.h): Document them.
* lib/limits.in.h: Also define CHAR_WIDTH etc. if C2x.
(BOOL_MAX, BOOL_WIDTH): New macros, from C2x.
* m4/limits-h.m4 (gl_LIMITS_H): Also check BOOL_WIDTH.
+2021-07-30 Paul Eggert <eggert@cs.ucla.edu>
+
+ limits-h: add BOOL_MAX, BOOL_WIDTH
+ * doc/posix-headers/limits.texi (limits.h): Document them.
+ * lib/limits.in.h: Also define CHAR_WIDTH etc. if C2x.
+ (BOOL_MAX, BOOL_WIDTH): New macros, from C2x.
+ * m4/limits-h.m4 (gl_LIMITS_H): Also check BOOL_WIDTH.
+
2021-07-28 Simon Josefsson <simon@josefsson.org>
maintainer-makefile: Respect cfg.mk setting announcement_Cc_,
@item
Macros like @code{CHAR_WIDTH} are not defined on some platforms:
glibc 2.24, NetBSD 9.0, many others.
+@item
+The macros @code{BOOL_MAX} and @code{BOOL_WIDTH} are not defined on
+some platforms:
+glibc 2.32, many others.
@end itemize
Portability problems fixed by Gnulib module @code{gethostname}:
# endif
#endif
-/* Macros specified by ISO/IEC TS 18661-1:2014. */
+/* Macros specified by C2x and by ISO/IEC TS 18661-1:2014. */
#if (! defined ULLONG_WIDTH \
- && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__))
+ && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__ \
+ || (defined __STDC_VERSION__ && 201710 < __STDC_VERSION__)))
# define CHAR_WIDTH _GL_INTEGER_WIDTH (CHAR_MIN, CHAR_MAX)
# define SCHAR_WIDTH _GL_INTEGER_WIDTH (SCHAR_MIN, SCHAR_MAX)
# define UCHAR_WIDTH _GL_INTEGER_WIDTH (0, UCHAR_MAX)
# define ULONG_WIDTH _GL_INTEGER_WIDTH (0, ULONG_MAX)
# define LLONG_WIDTH _GL_INTEGER_WIDTH (LLONG_MIN, LLONG_MAX)
# define ULLONG_WIDTH _GL_INTEGER_WIDTH (0, ULLONG_MAX)
-#endif /* !ULLONG_WIDTH && (_GNU_SOURCE || __STDC_WANT_IEC_60559_BFP_EXT__) */
+#endif
+
+/* Macros specified by C2x. */
+
+#if (! defined BOOL_WIDTH \
+ && (defined _GNU_SOURCE \
+ || (defined __STDC_VERSION__ && 201710 < __STDC_VERSION__)))
+# define BOOL_MAX 1
+# define BOOL_WIDTH 1
+#endif
#endif /* _@GUARD_PREFIX@_LIMITS_H */
#endif /* _@GUARD_PREFIX@_LIMITS_H */
[
gl_CHECK_NEXT_HEADERS([limits.h])
- AC_CACHE_CHECK([whether limits.h has LLONG_MAX, WORD_BIT, ULLONG_WIDTH etc.],
+ AC_CACHE_CHECK([whether limits.h has WORD_BIT, BOOL_WIDTH etc.],
[gl_cv_header_limits_width],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
long long llm = LLONG_MAX;
int wb = WORD_BIT;
int ullw = ULLONG_WIDTH;
+ int bw = BOOL_WIDTH;
]])],
[gl_cv_header_limits_width=yes],
[gl_cv_header_limits_width=no])])