OK, Solaris on the buildbot uses flex 2.5.35.

diff --git a/configure.ac b/configure.ac
index 7bb2024d623f6ed42e86d265dd227ac922d9561a..31e9d9924fc8be5bcef9fc24e8696fe4ed663560 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -560,12 +560,11 @@ dnl ----------------
 dnl CHECK FLEX FIXUP
 dnl ----------------
 dnl Use LFLAGS make variable setting to work around bug in flex
-dnl 2.5.36 and .37 that causes signed/unsigned mismatch,
+dnl 2.5.35-37 that causes signed/unsigned mismatch,
 dnl http://sourceforge.net/p/flex/bugs/140/
-flex -V
 AS_IF([test "$LEX" = flex],
       [AS_CASE([`$LEX -V`],
-               [flex\ 2.5.3@<:@67@:>@], [[LFLAGS=\
+               [flex\ 2.5.3@<:@567@:>@], [[LFLAGS=\
 '; flex -V; cp -p $@ $@.ORIGINAL; printf "%s\n" '\''1,$$s/\(   \)int i;/\1yy_size_t i;/'\'' w q | ed -s $@; diff $@ $@.ORIGINAL || true']])
        AC_SUBST([LFLAGS])])