build: check for Lua >= 5.2 in configure script

The generic lua pkg-config name also match for Lua 5.1 which
then results in a linker error because the necessary functions
are not available.

1 files changed, 5 insertions, 1 deletions

diff --git a/configure b/configure
index 951e67e..b100b48 100755
--- a/configure
+++ b/configure
@@ -354,12 +354,16 @@ CONFIG_LUA=0
 
 if test "$lua" != "no" ; then
 
-	printf "checking for liblua...\n"
+	printf "checking for liblua >= 5.2 ...\n"
 
 cat > "$tmpc" <<EOF
 #include <lua.h>
 #include <lauxlib.h>
 
+#if LUA_VERSION_NUM < 502
+#error "Need at least Lua 5.2"
+#endif
+
 int main(int argc, char *argv[]) {
 	lua_State *L = luaL_newstate();
 	luaL_openlibs(L);