From: Jim Meyering <jim@meyering.net>
Date: Wed, 16 May 2001 07:33:22 +0000 (+0000)
Subject: Use proper quoting so brackets appear in the test program.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bcfcc8bed2f411bbeb7978a2f8cf4e9c96affb68;p=pspp

Use proper quoting so brackets appear in the test program.
---

diff --git a/m4/regex.m4 b/m4/regex.m4
index 66b39c3aea..f546dd7bcd 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -30,9 +30,10 @@ AC_DEFUN(jm_INCLUDED_REGEX,
 	    const char *s;
 	    struct re_registers regs;
 	    re_set_syntax (RE_SYNTAX_POSIX_EGREP);
-	    /* Add this third left square bracket, [, to balance the
-	       three right ones below.  Otherwise autoconf-2.14 chokes.  */
+	    /* These two brackets, `[[' and the one in the comment below serve
+	       to quote the brackets (unbalanced) in the following line.  */
 	    s = re_compile_pattern ("a[[:]:]]b\n", 9, &regex);
+	    /* This bracket `]' helps quote the unbalanced expression above.  */
 	    /* This should fail with _Invalid character class name_ error.  */
 	    if (!s)
 	      exit (1);