From 7de35515d90d364e851cdde712062b942d6bf36a Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 8 Jan 2026 09:10:38 +0100
Subject: [PATCH] mprintf: drop old sprintf fallback

1. No modern systems lack snprintf()

2. If there actually exist any such systems, they get to manage without
   floating point output.

Closes #20218
---
 lib/mprintf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/mprintf.c b/lib/mprintf.c
index 50ede212a4..85aedf4992 100644
--- a/lib/mprintf.c
+++ b/lib/mprintf.c
@@ -712,7 +712,8 @@ static bool out_double(void *userp,
   work[BUFFSIZE - 1] = 0;
 #endif
 #else
-  (sprintf)(work, formatbuf, dnum);
+  /* float and double outputs do not work without snprintf support */
+  work[0] = 0;
 #endif
 #ifdef __clang__
 #pragma clang diagnostic pop