[FFmpeg-devel] [PATCH] configure: set PT_GNU_STACK to 1M (PR #21192)

[FFmpeg-devel] [PATCH] configure: set PT_GNU_STACK to 1M (PR #21192)

[Kacper Michajłow via ffmpeg-devel]

PR #21192 opened by Kacper Michajłow (kasper93)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21192
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21192.patch

This requests stack size. With Musl libc, the default thread stack size
is 128KB, which is not enough for all the code.

One example is VVC's put_scaled() which uses ~320KB on stack. While this
would be good to improve this and other instances where stack usage is
excessive in the meantime let's request size as needed.


From e0b3f29289d35197e417d9fe60878479ac11f863 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kacper=20Michaj=C5=82ow?= <kasper93@gmail.com>
Date: Sun, 14 Dec 2025 15:32:08 +0100
Subject: [PATCH] configure: set PT_GNU_STACK to 1M
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This requests stack size. With Musl libc, the default thread stack size
is 128KB, which is not enough for all the code.

One example is VVC's put_scaled() which uses ~320KB on stack. While this
would be good to improve this and other instances where stack usage is
excessive in the meantime let's request size as needed.

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
---
 configure | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure b/configure
index 9ec421cd23..0853e10eb6 100755
--- a/configure
+++ b/configure
@@ -6697,6 +6697,7 @@ check_cc intrinsics_neon arm_neon.h "int16x8_t test = vdupq_n_s16(0)"
 
 check_ldflags -Wl,--as-needed
 check_ldflags -Wl,-z,noexecstack
+check_ldflags -Wl,-z,stack-size=1048576
 if [ $target_os = "darwin" ]; then
     check_ldflags -Wl,-no_warn_duplicate_libraries
 fi
-- 
2.49.1

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