X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/28c4075b58130c1b98747ca61876f5c7660b2397..b51cf830a6cb513ca8e357321307997672d6d6b0:/configure.ac?ds=sidebyside

diff --git a/configure.ac b/configure.ac
index f7319a15..992e2033 100644
--- a/configure.ac
+++ b/configure.ac
@@ -175,7 +175,10 @@ AC_SUBST([YACC_LIBRARY])
 # Checks for programs.
 AM_MISSING_PROG([DOT], [dot])
 AC_PROG_LEX
-$LEX_IS_FLEX || AC_MSG_ERROR([Flex is required])
+$LEX_IS_FLEX || test "X$LEX" = X: || {
+  AC_MSG_WARN([bypassing lex because flex is required])
+  LEX=:
+}
 AC_PROG_YACC
 AC_PROG_RANLIB
 AC_PROG_GNU_M4