From 3ca861c7dd048a8bc15b6776a3b56fdc790750f7 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Mon, 25 Feb 2019 19:31:30 -0500
Subject: add a compile error note when C import fails and not linking libc

closes #558
---
 src/ir.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/ir.cpp')

diff --git a/src/ir.cpp b/src/ir.cpp
index 929f195586..d6e40384f8 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -18705,6 +18705,10 @@ static IrInstruction *ir_analyze_instruction_c_import(IrAnalyze *ira, IrInstruct
 
     if (errors.length > 0) {
         ErrorMsg *parent_err_msg = ir_add_error_node(ira, node, buf_sprintf("C import failed"));
+        if (ira->codegen->libc_link_lib == nullptr) {
+            add_error_note(ira->codegen, parent_err_msg, node,
+                buf_sprintf("libc headers not available; compilation does not link against libc"));
+        }
         for (size_t i = 0; i < errors.length; i += 1) {
             ErrorMsg *err_msg = errors.at(i);
             err_msg_add_note(parent_err_msg, err_msg);
-- 
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