Commit 5de07ab721

@@ -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");
 }

@@ -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;
 }