From cd1806b57f544fd25ba252e6d82cc4fba0144970 Mon Sep 17 00:00:00 2001
From: kaichaosun <kaichaosuna@gmail.com>
Date: Fri, 5 Sep 2025 17:40:43 +0800
Subject: [PATCH] chore: fix build with concurrent jobs.

---
 scripts/build_rln.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/scripts/build_rln.sh b/scripts/build_rln.sh
index cd2fa3827..b2de86d42 100755
--- a/scripts/build_rln.sh
+++ b/scripts/build_rln.sh
@@ -14,6 +14,14 @@ output_filename=$3
 [[ -z "${rln_version}" ]]     && { echo "No rln version specified";     exit 1; }
 [[ -z "${output_filename}" ]] && { echo "No output filename specified"; exit 1; }
 
+# Create lock (wait if another process is building)
+lockfile="${output_filename}.lock"
+exec 9>"$lockfile"
+if ! flock -n 9; then
+  echo "Another build process is running, waiting..."
+  flock 9
+fi
+
 # Get the host triplet
 host_triplet=$(rustc --version --verbose | awk '/host:/{print $2}')