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new 3fe6c8dee2 configure: do not probe dcbzl when it is disabled
3fe6c8dee2 is described below
commit 3fe6c8dee248df6732c400bced46d8d0557d3444
Author: Josef Schlehofer <[email protected]>
AuthorDate: Mon Sep 28 07:56:27 2026 +0200
Commit: michaelni <[email protected]>
CommitDate: Fri Oct 9 16:47:16 2026 +0000
configure: do not probe dcbzl when it is disabled
The dcbzl probe runs unconditionally and re-enables dcbzl whenever the
assembler accepts it, overriding --disable-dcbzl and the "disable dcbzl"
in the e500 and e500v2 --cpu cases. e500 cores trap on dcbzl, so ffmpeg
dies with SIGILL in ff_blockdsp_init_ppc() on a P2020 (e500v2) as soon
as it opens an MPEG-2 decoder.
Only run the probe when dcbzl is not disabled.
Fixes: #24747
Suggested-by: Michael Niedermayer <[email protected]>
Original-patch-by: Peter Krefting <[email protected]>
Signed-off-by: Josef Schlehofer <[email protected]>
---
configure | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure b/configure
index 08ff6892fb..f542d4e0d6 100755
--- a/configure
+++ b/configure
@@ -6662,7 +6662,7 @@ elif enabled parisc; then
elif enabled ppc; then
- check_inline_asm dcbzl '"dcbzl 0, %0" :: "r"(0)'
+ disabled dcbzl || check_inline_asm dcbzl '"dcbzl 0, %0" :: "r"(0)'
check_inline_asm ibm_asm '"add 0, 0, 0"'
check_inline_asm ppc4xx '"maclhw r10, r11, r12"'
check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
--
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