Make blank after -j flag optional

tools/toolchain/install_cp2k_toolchain.sh

@@ -372,6 +372,9 @@ while [ $# -ge 1 ]; do
       shift
       export NPROCS_OVERWRITE=$1
       ;;
+    -j[0-9]*)
+      export NPROCS_OVERWRITE=${1#-j}
+      ;;
     --no-check-certificate)
       export DOWNLOADER_FLAGS="-n"
       ;;

tools/toolchain/scripts/tool_kit.sh

@@ -144,7 +144,7 @@ reverse() (
 # get the number of processes available for compilation
 get_nprocs() {
   if [ -n "${NPROCS_OVERWRITE}" ]; then
-    echo "${NPROCS_OVERWRITE}"
+    echo ${NPROCS_OVERWRITE} | sed 's/^0*//'
   elif $(command -v nproc >&- 2>&-); then
     echo $(nproc --all)
   else