From 9757af5e4a9c45873726c36ec5af195c8cd0728b Mon Sep 17 00:00:00 2001
From: Jim Powers <jim@corruptmemory.com>
Date: Sun, 28 Mar 2021 10:11:24 -0400
Subject: [PATCH] Helpful error message for invalid `-define:` cases

---
 src/main.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 2496c87ae..802833e78 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1038,6 +1038,7 @@ bool parse_build_flags(Array<String> args) {
 							if (v.kind != ExactValue_Invalid) {
 								map_set(&build_context.defined_values, key, v);
 							} else {
+								gb_printf_err("Invalid define constant value: '%.*s'. Define constants must be a valid Odin literal.\n", LIT(value));
 								bad_flags = true;
 							}
 
@@ -1528,7 +1529,7 @@ i32 exec_llvm_opt(String output_base) {
     "opt \"%.*s.ll\" -o \"%.*s_memcpy_pass.bc\" -memcpyopt"
     "",
     LIT(output_base), LIT(output_base))
-  
+
 	|| system_exec_command_line_app("llvm-opt",
 		"opt \"%.*s_memcpy_pass.bc\" -o \"%.*s.bc\" %.*s "
 		"",