From c4c763e75ee09511621eb432618116e8ec2013c5 Mon Sep 17 00:00:00 2001
From: ALTracer <11005378+ALTracer@users.noreply.github.com>
Date: Sun, 21 Apr 2024 12:34:56 +0300
Subject: [PATCH] hosted: Use unbuffered stdout on Windows

* Line-buffered mode is unsupported on Windows libc,
  and 4k-buffered mode is not interactive enough.
* Disable buffering completely as an alternative to sprinkling tons of fflush() calls.
---
 src/platforms/hosted/platform.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/platforms/hosted/platform.c b/src/platforms/hosted/platform.c
index 22bb30a3dfa..1288818fc53 100644
--- a/src/platforms/hosted/platform.c
+++ b/src/platforms/hosted/platform.c
@@ -114,6 +114,10 @@ void platform_init(int argc, char **argv)
 {
 #if defined(_WIN32) || defined(__CYGWIN__)
 	SetConsoleOutputCP(CP_UTF8);
+	if (setvbuf(stdout, NULL, _IONBF, 0) < 0) {
+		int err = errno;
+		fprintf(stderr, "%s: %s returns %s\n", __func__, "setvbuf()", strerror(err));
+	}
 #endif
 	cl_init(&cl_opts, argc, argv);
 	atexit(exit_function);