patch for picky C++ compilers and a buggy flex

[Paul Eggert]

I installed this to work around a bogus diagnostic generated by Sun
C++ 5.7 on Solaris 10.  The real bug is in flex, and it's one we've
seen before.

2006-02-08  Paul Eggert  <address@hidden>

        More portability fixes for problems summarized by Nelson H. F. Beebe.

        * doc/bison.texinfo (Calc++ Scanner): Work around a bug in flex
        2.5.31.  This resembles the 2005-10-10 patch to src/scan-skel.l.

--- doc/bison.texinfo   30 Jan 2006 11:15:15 -0000      1.175
+++ doc/bison.texinfo   8 Feb 2006 19:22:55 -0000
@@ -7571,6 +7571,10 @@ parser's to get the set of defined token
 # include <string>
 # include "calc++-driver.hh"
 # include "calc++-parser.hh"
+/* Work around a bug in flex 2.5.31.  See Debian bug 333231
+  <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>.  */
+# undef yywrap
+# define yywrap() 1
 address@hidden
 @end example