Updated make.sh script for both Gnu/Linux and BSD

make.sh

@@ -1,4 +1,14 @@
-#!/usr/bin/zsh 
+#!/bin/sh
 
-rm config.h
-make install
+if command -v nproc >/dev/null 2>&1; then
+    cores=$(nproc)
+elif command -v sysctl >/dev/null 2>&1; then
+    cores=$(sysctl -n hw.ncpu)
+else
+    echo "Error: Unable to determine the number of CPU cores."
+    exit 1
+fi
+
+make clean;
+yes | rm config.h;
+make -j"$cores" && echo "Now run "doas make install" to install DWM" || echo "Error"