build.sh add help [skip ci]

build.sh

@@ -1,8 +1,15 @@
 #!/bin/bash
 
+main()
+{
 	CC=gcc
 	CXX=g++
 
+	if [[ "$*" =~ "--help" ]]; then
+		help
+		exit 0;
+	fi
+
 	n=0
 	args=()
 	for i in "$@"
@@ -25,8 +32,8 @@ done
 
 	case "$C" in
 		("intel"|"icc")	CC=icc CXX=icpc ;;
-	("gcc")			CC=gcc CXX=g++ ;;
-	("clang")		CC=clang CXX=clang++ ;;
+		("gcc"|"g++")	CC=gcc CXX=g++ ;;
+		("clang|llvm")	CC=clang CXX=clang++ ;;
 		*)
 		;;
 	esac
@@ -37,3 +44,17 @@ pushd build &> /dev/null
 	CC=$CC CXX=$CXX cmake ${args[@]} ..
 	make ${jobs}
 	popd > /dev/null
+}
+
+help()
+{
+	printf "Usage: ./build.sh <options>\n\n"
+	printf "  -c= | --compiler=<icc|gcc|clang> - Select preferred C/C++ compiler to build\n"
+	printf "  -j= | --jobs=<N>                 - Specifies the number of jobs (commands) to run simultaneously (For faster building)\n\n"
+}
+
+# Initialize
+main $*
+
+# Exit normally
+exit 0