Tram is now an optional dependency

src/main.c

@@ -111,7 +111,11 @@ int main(int argc, char** argv) {
     }
 
     if (compile) {
+#ifdef GROUND_COMPILE_WITH_TRAM
         compileGroundProgram(&program, "program.gexe");
+#else
+        printf("This version of Ground has been compiled without Tram, so compilation is not supported.\n");
+#endif
     } else if (writeBytecode) {
         serializeProgramToFile(outFileName, &program);
     } else {