From cb744f3a28cf5aa6caef797e9265b7165c903a55 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Tue, 20 Mar 2018 13:48:25 -0400
Subject: [PATCH] self-hosted build: print helpful message when libstdc++.a not
 found

closes #843
---
 build.zig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/build.zig b/build.zig
index 2e6c6dd831..88775498ca 100644
--- a/build.zig
+++ b/build.zig
@@ -64,6 +64,14 @@ pub fn build(b: &Builder) !void {
     if (exe.target.getOs() == builtin.Os.linux) {
         const libstdcxx_path_padded = try b.exec([][]const u8{cxx_compiler, "-print-file-name=libstdc++.a"});
         const libstdcxx_path = ??mem.split(libstdcxx_path_padded, "\r\n").next();
+        if (mem.eql(u8, libstdcxx_path, "libstdc++.a")) {
+            warn(
+                \\Unable to determine path to libstdc++.a
+                \\On Fedora, install libstdc++-static and try again.
+                \\
+            );
+            return error.RequiredLibraryNotFound;
+        }
         exe.addObjectFile(libstdcxx_path);
 
         exe.linkSystemLibrary("pthread");