[fix](macOS) Fix build scripts for macOS

- Replaced `nproc` with `sysctl -n hw.logicalcpu` to get CPU count on macOS.
- Avoided lowercase parameter expansion due to macOS default Bash version (3.2).

build.sh

@@ -148,7 +148,14 @@ fi
 
 eval set -- "${OPTS}"
 
-PARALLEL="$(($(nproc) / 4 + 1))"
+NUM_CORES=0
+if [[ "$(uname -s)" == 'Darwin' ]]; then
+    NUM_CORES=$(sysctl -n hw.logicalcpu)
+else
+    NUM_CORES=$(nproc)
+fi
+
+PARALLEL="$((${NUM_CORES} / 4 + 1))"
 BUILD_FE=0
 BUILD_BE=0
 BUILD_CLOUD=0

thirdparty/download-thirdparty.sh

@@ -54,9 +54,11 @@ SPEC_ARCHIVES=(
 )
 while [[ $# -gt 0 ]]; do
     GIVEN_LIB=$1
+    GIVEN_LIB_LOWER="$(echo ${GIVEN_LIB} | awk '{print tolower($0)}')"
     SPEC_LIB=
     for TP_ARCH in "${TP_ARCHIVES[@]}"; do
-        if [[ "${GIVEN_LIB,,}" = "${TP_ARCH,,}" ]]; then
+        TP_ARCH_LOWER="$(echo ${TP_ARCH} | awk '{print tolower($0)}')"
+        if [[ "${GIVEN_LIB_LOWER}" = "${TP_ARCH_LOWER}" ]]; then
             SPEC_LIB=${TP_ARCH}
             break
         fi