* lib/memcasecmp.c: Include <limits.h>. (memcasecmp): Don't assume UCHAR_MAX <= INT_MAX. * lib/strtod.c (strtod): Don't assume isspace works on negative chars. Don't assume isdigit succeeds only on '0' through '9'. * lib/exclude.c (IN_CTYPE_DOMAIN, is_space): Remove; no longer needed. All uses of is_space replaced by isspace. * lib/fnmatch.c (ISASCII): Remove; no longer needed. All uses removed. (ISPRINT, ISDIGIT, ISALNUM, ISALPHA, ISCNTRL, ISLOWER, ISPUNCT): (ISSPACE, ISUPPER, ISXDIGIT): Remove; no longer needed. All uses replaced by isprint etc. * lib/getdate.y (IN_CTYPE_DOMAIN, ISSPACE, ISALPHA, ISLOWER): Likewise. * lib/getusershell.c (IN_CTYPE_DOMAIN, ISSPACE): Likewise. * lib/memcasecmp.c (IN_CTYPE_DOMAIN, ISLOWER, TOUPPER): Likewise. * lib/strtod.c (IN_CTYPE_DOMAIN, ISSPACE, ISDIGIT, TOLOWER): Likewise. * lib/strtol.c (IN_CTYPE_DOMAIN): Likewise. * lib/xstrtol.c (IN_CTYPE_DOMAIN, ISSPACE): Likewise. * m4/xstrtol.m4 (gl_PREREQ_XSTRTOL): Use AC_CHECK_DECLS_ONCE rather than AC_CHECK_DECLS for strtoimax and strtoumax. * m4/getusershell.m4 (gl_PREREQ_GETUSERSHELL): Remove; no longer needed. All uses removed. * m4/strtol.m4 (gl_PREREQ_STRTOL): Likewise. * m4/strtoul.m4 (gl_PREREQ_STRTOUL): Likewise. * m4/exclude.m4 (gl_EXCLUDE): Don't check for isascii; no longer needed. * m4/getdate.m4 (gl_GETDATE): Likewise. * m4/getusershell.m4 (gl_PREREQ_GETUSERSHELL): Likewise. * m4/memcasecmp.m4 (gl_MEMCASECMP): Likewise. * m4/strtod.m4 (gl_FUNC_STRTOD): Likewise. * m4/strtol.m4 (gl_PREREQ_STRTOL): Likewise. * m4/strtoul.m4 (gl_PREREQ_STRTOUL): Likewise. * m4/xstrtol.m4 (gl_PREREQ_XSTRTOL): Likewise. * m4/exclude.m4 (gl_EXCLUDE): Don't require AC_C_INLINE; no longer needed. * m4/calloc.m4 (_AC_FUNC_CALLOC_IF): Don't require AC_HEADER_STDC; no longer needed. * m4/exclude.m4 (gl_EXCLUDE): Likewise. * m4/getdate.m4 (gl_GETDATE): Likewise. * m4/getusershell.m4 (gl_PREREQ_GETUSERSHELL): Likewise. * m4/memcasecmp.m4 (gl_MEMCASECMP): Likewise. * m4/strtod.m4 (gl_FUNC_STRTOD): Likewise. * m4/strtol.m4 (gl_PREREQ_STRTOL): Likewise. * m4/xstrtol.m4 (gl_PREREQ_XSTRTOL): Likewise.

--- a/lib/exclude.c
+++ b/lib/exclude.c
@@ -43,18 +43,6 @@
 # include "unlocked-io.h"
 #endif
 
-#if STDC_HEADERS || (! defined isascii && ! HAVE_ISASCII)
-# define IN_CTYPE_DOMAIN(c) true
-#else
-# define IN_CTYPE_DOMAIN(c) isascii (c)
-#endif
-
-static inline bool
-is_space (unsigned char c)
-{
-  return IN_CTYPE_DOMAIN (c) && isspace (c);
-}
-
 /* Non-GNU systems lack these options, so we don't need to check them.  */
 #ifndef FNM_CASEFOLD
 # define FNM_CASEFOLD 0
@@ -244,12 +232,12 @@
       {
 	char *pattern_end = p;
 
-	if (is_space (line_end))
+	if (isspace ((unsigned char) line_end))
 	  {
 	    for (; ; pattern_end--)
 	      if (pattern_end == pattern)
 		goto next_pattern;
-	      else if (! is_space (pattern_end[-1]))
+	      else if (! isspace ((unsigned char) pattern_end[-1]))
 		break;
 	  }