From b18b1d04a4b5b5a28d1e92a654033783372add32 Mon Sep 17 00:00:00 2001
From: Zhigao Tong <tongzhigao@pingcap.com>
Date: Wed, 16 Mar 2022 17:19:53 +0800
Subject: [PATCH] Limit build release parallelism (#4301)

ref pingcap/tiflash#4141
---
 release-centos7-llvm/scripts/build-tiflash-release.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/release-centos7-llvm/scripts/build-tiflash-release.sh b/release-centos7-llvm/scripts/build-tiflash-release.sh
index c424d465742..d3eda1dff4e 100755
--- a/release-centos7-llvm/scripts/build-tiflash-release.sh
+++ b/release-centos7-llvm/scripts/build-tiflash-release.sh
@@ -35,6 +35,7 @@ set -ueox pipefail
 
 SCRIPTPATH="$( cd "$(dirname "$0")" ; pwd -P )"
 SRCPATH=$(cd ${SCRIPTPATH}/../..; pwd -P)
+NPROC=${NPROC:-$(nproc || grep -c ^processor /proc/cpuinfo)}
 
 INSTALL_DIR="${SRCPATH}/release-centos7-llvm/tiflash"
 rm -rf ${INSTALL_DIR} && mkdir -p ${INSTALL_DIR}
@@ -51,7 +52,7 @@ cmake "${SRCPATH}" ${DEFINE_CMAKE_PREFIX_PATH} \
       -DRUN_HAVE_STD_REGEX=0 \
       -GNinja
 
-cmake --build . --target tiflash --parallel
+cmake --build . --target tiflash --parallel ${NPROC}
 cmake --install . --component=tiflash-release --prefix="${INSTALL_DIR}"
 
 # unset LD_LIBRARY_PATH before test