cmake: -DLUA_USE_POPEN

Author: ligurio

cmake/BuildLua.cmake

@@ -61,6 +61,8 @@ macro(build_lua LUA_VERSION)
     # not be used when making a shared object; recompile with -fPIC".
     set(CFLAGS "${CFLAGS} -fPIC")
 
+    set(CFLAGS "${CFLAGS} -DLUA_USE_POPEN")
+
     include(ExternalProject)
 
     set(LUA_LIBRARY ${PROJECT_BINARY_DIR}/lua-${LUA_VERSION}/source/liblua.a)