Don't assume grep handles -e in lib/freeze.mk

[Albert Chin]

On Solaris, grep doesn't handle -e. Patch against HEAD.

-- 
albert chin (address@hidden)

-- snip snip
2004-03-18  Albert Chin-A-Young  <address@hidden>

        * lib/freeze.mk: Don't assume grep handles -e. On Solaris,
        grep does not.

Index: lib/freeze.mk
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/freeze.mk,v
retrieving revision 1.9
diff -u -3 -p -r1.9 freeze.mk
--- lib/freeze.mk       27 Oct 2002 18:16:06 -0000      1.9
+++ lib/freeze.mk       18 Mar 2004 17:48:45 -0000
@@ -119,7 +119,7 @@ ETAGS_FOR_AUTOCONF = \
 
 check-forbidden-patterns:
        if (cd $(srcdir) && \
-           grep $(forbidden_patterns) $(forbidden_patterns_files)) \
+           egrep $(forbidden_patterns) $(forbidden_patterns_files)) \
            >forbidden.log; then \
          echo "ERROR: forbidden patterns were found:" >&2; \
          sed "s,^,$*.m4: ," <forbidden.log >&2; \