From 59b3b6d4e41a3483ef21bf10c4fdcd094f00473d Mon Sep 17 00:00:00 2001
From: Petter Reinholdtsen <pere@hungry.com>
Date: Wed, 22 Apr 2026 05:51:48 +0200
Subject: [PATCH] Added locking around compiling in autotest.sh to avoid text
 busy race.
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Patch by Daniel Gröber via Debian.

See also issue #5805.
---
 tests/tools/autotest.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/tools/autotest.sh b/tests/tools/autotest.sh
index e19a8d5af..782681a5e 100755
--- a/tests/tools/autotest.sh
+++ b/tests/tools/autotest.sh
@@ -25,9 +25,11 @@ firrtl2verilog=""
 xfirrtl="../xfirrtl"
 abcprog="$toolsdir/../../yosys-abc"
 
+exec {lock}<"$toolsdir"; flock "$lock" 1>&2
 if [ ! -f "$toolsdir/cmp_tbdata" -o "$toolsdir/cmp_tbdata.c" -nt "$toolsdir/cmp_tbdata" ]; then
 	( set -ex; ${CXX:-g++} -Wall -o "$toolsdir/cmp_tbdata" "$toolsdir/cmp_tbdata.c"; ) || exit 1
 fi
+flock -u "$lock"; exec {lock}>&-
 
 while getopts xmGl:wkjvref:s:p:n:S:I:A:-: opt; do
 	case "$opt" in