From 5de07ab721380c39130a0bd3277a272673e3d644 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Mon, 27 May 2019 15:48:31 -0400
Subject: [PATCH] revert hello world examples. macos tests passing

---
 example/hello_world/hello.zig      | 8 ++++++--
 example/hello_world/hello_libc.zig | 7 +++++--
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/example/hello_world/hello.zig b/example/hello_world/hello.zig
index 126faf62fb..cb7d5ef157 100644
--- a/example/hello_world/hello.zig
+++ b/example/hello_world/hello.zig
@@ -1,5 +1,9 @@
 const std = @import("std");
 
-pub fn main() void {
-    std.debug.warn("Hello, world!\n");
+pub fn main() !void {
+    // If this program is run without stdout attached, exit with an error.
+    const stdout_file = try std.io.getStdOut();
+    // If this program encounters pipe failure when printing to stdout, exit
+    // with an error.
+    try stdout_file.write("Hello, world!\n");
 }
diff --git a/example/hello_world/hello_libc.zig b/example/hello_world/hello_libc.zig
index d18b1c26b3..05356bf529 100644
--- a/example/hello_world/hello_libc.zig
+++ b/example/hello_world/hello_libc.zig
@@ -2,9 +2,12 @@ const c = @cImport({
     // See https://github.com/ziglang/zig/issues/515
     @cDefine("_NO_CRT_STDIO_INLINE", "1");
     @cInclude("stdio.h");
+    @cInclude("string.h");
 });
 
-export fn main(argc: c_int, argv: [*]?[*]u8) c_int {
-    _ = c.fprintf(c.stderr, c"Hello, world!\n");
+const msg = c"Hello, world!\n";
+
+export fn main(argc: c_int, argv: **u8) c_int {
+    if (c.printf(msg) != @intCast(c_int, c.strlen(msg))) return -1;
     return 0;
 }