build system: capture stderr and report it later

Instead of dumping directly to stderr. This prevents processes running
simultaneously from racing their stderr against each other.

For now it only reports at the end, but an improvement would be to
report as soon as a failed step occurs.

1 files changed, 1 insertions, 4 deletions

diff --git a/build.zig b/build.zig
index 12e5d014e2..797c980739 100644
--- a/build.zig
+++ b/build.zig
@@ -676,10 +676,7 @@ fn addCxxKnownPath(
 ) !void {
     if (!std.process.can_spawn)
         return error.RequiredLibraryNotFound;
-    const path_padded = try b.exec(&[_][]const u8{
-        ctx.cxx_compiler,
-        b.fmt("-print-file-name={s}", .{objname}),
-    });
+    const path_padded = b.exec(&.{ ctx.cxx_compiler, b.fmt("-print-file-name={s}", .{objname}) });
     var tokenizer = mem.tokenize(u8, path_padded, "\r\n");
     const path_unpadded = tokenizer.next().?;
     if (mem.eql(u8, path_unpadded, objname)) {