[486-no-longer-use-bison-is-yacc-emulation-mode] Improved LEX check

diff --git a/configure.ac b/configure.ac
index 5491715675cb2ea91764f9753cf871f03a90c842..b0390257fb39041c07df8a752cb3c6c4259aa5d7 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1385,7 +1385,7 @@ AC_PROG_YACC
 
 if test "x$enable_generate_parser" != "xno"; then
 
-    if test "x$LEX" == "x"; then
+    if test "x$LEX" != "xflex"; then
        AC_MSG_ERROR([Flex is required for enable-generate-parser, but was not found])
     fi