add bash_build.sh for no cmake environment.

bash_build.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+RED=$(tput setaf 1)
+GREEN=$(tput setaf 2)
+NCOLOR=$(tput sgr0)
+
+set -e
+set -o pipefail
+lib_name=pt_os
+build_dir=build
+
+#test g++ and git has been installed
+g++ --version
+git --version
+
+#remove the build dir and make it.
+if [ -d ${build_dir} ];then
+    rm -rf ${build_dir}/*
+else
+    mkdir ${build_dir}
+fi
+pushd ${build_dir}
+
+#clone the dependency repo
+git clone https://github.com/ZhuLingQing/protothreads.git
+#build the os static library
+g++ -g -o ${lib_name}.o -c ../pt-os.cpp -I./protothreads
+ar -rv lib${lib_name}.a ${lib_name}.o
+#build the test
+g++ -g -o test_pt_os ../tests/*.cpp -I./protothreads -I.. -L. -l${lib_name}
+#run the test
+./test_pt_os
+rc=$?
+if [ ${rc} -eq 0 ];then
+    echo "${GREEN}test pass${NCOLOR}"
+else
+    echo "${RED}test failed ${rc} ${NCOLOR}"
+fi
+
+popd