X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fregex.m4;h=e04dd4a4fd779c69cabb3fbad9f8c5be9f463824;hb=2220ef77b370b8a55591463e49d2789464f38aa5;hp=d80eafb2ce5ccdbdba7fa785d5920e7522ea3182;hpb=e059c2358aad79ce8dfd9581dd6f12ce8503dc63;p=gnulib.git

diff --git a/m4/regex.m4 b/m4/regex.m4
index d80eafb2c..e04dd4a4f 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-#serial 13
+#serial 20
 
 dnl Initially derived from code in GNU grep.
 dnl Mostly written by Jim Meyering.
@@ -27,6 +27,7 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 		   jm_cv_func_working_re_compile_pattern,
       AC_TRY_RUN(
 [#include <stdio.h>
+#include <string.h>
 #include <regex.h>
 	  int
 	  main ()
@@ -35,12 +36,14 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 	    const char *s;
 	    struct re_registers regs;
 	    re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+	    memset (&regex, 0, sizeof (regex));
 	    [s = re_compile_pattern ("a[[:@:>@:]]b\n", 9, &regex);]
 	    /* This should fail with _Invalid character class name_ error.  */
 	    if (!s)
 	      exit (1);
 
 	    /* This should succeed, but doesn't for e.g. glibc-2.1.3.  */
+	    memset (&regex, 0, sizeof (regex));
 	    s = re_compile_pattern ("{1", 2, &regex);
 
 	    if (s)
@@ -48,7 +51,8 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 
 	    /* The following example is derived from a problem report
                against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
-	    s = re_compile_pattern ("[[anù]]*n", 7, &regex);
+	    memset (&regex, 0, sizeof (regex));
+	    s = re_compile_pattern ("[[an\371]]*n", 7, &regex);
 	    if (s)
 	      exit (1);
 
@@ -56,6 +60,16 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 	    if (re_match (&regex, "an", 2, 0, &regs) != 2)
 	      exit (1);
 
+	    memset (&regex, 0, sizeof (regex));
+	    s = re_compile_pattern ("x", 1, &regex);
+	    if (s)
+	      exit (1);
+
+	    /* The version of regex.c in e.g. GNU libc-2.2.93 didn't
+	       work with a negative RANGE argument.  */
+	    if (re_search (&regex, "wxy", 3, 2, -2, &regs) != 1)
+	      exit (1);
+
 	    exit (0);
 	  }
 	],
@@ -89,16 +103,17 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 # Prerequisites of lib/regex.c.
 AC_DEFUN([jm_PREREQ_REGEX],
 [
-  dnl FIXME: Maybe provide a btowc replacement someday: solaris-2.5.1 lacks it.
+  dnl FIXME: Maybe provide a btowc replacement someday: Solaris 2.5.1 lacks it.
   dnl FIXME: Check for wctype and iswctype, and and add -lw if necessary
   dnl to get them.
 
   dnl Persuade glibc <string.h> to declare mempcpy().
   AC_REQUIRE([AC_GNU_SOURCE])
 
+  AC_REQUIRE([gl_C_RESTRICT])
   AC_REQUIRE([AC_FUNC_ALLOCA])
   AC_REQUIRE([AC_HEADER_STDC])
-  AC_CHECK_HEADERS_ONCE(limits.h string.h wchar.h wctype.h)
+  AC_CHECK_HEADERS_ONCE(wchar.h wctype.h)
   AC_CHECK_FUNCS_ONCE(isascii mempcpy)
   AC_CHECK_FUNCS(btowc)
 ])