Add AC_ALLOCA if using bison

diff --git a/configure.in b/configure.in
index b4a7fd1f7fe6f4fd4ceebd6e5b3cdc15618a0b41..de6d00b4779a54ec7cb3f1b285a256c5f7362ed1 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -10,4 +10,10 @@ AC_PROG_INSTALL
 AC_CONST
 AC_STDC_HEADERS
 
+case "$YACC" in
+*bison*)
+  AC_ALLOCA
+  ;;
+esac
+
 AC_OUTPUT(Makefile)