Merge pull request #6 from imotai/feat/add_absl

fix: fix absl compile in completed bug

Author: imotai

build_env/build_library.sh

@@ -76,7 +76,7 @@ if [ ! -f "absl_succ" ]; then
 	echo "installing gtest ...."
 	tar xzf a50ae369a30f99f79d7559002aba3413dac1bd48.tar.gz
 	pushd abseil-cpp-a50ae369a30f99f79d7559002aba3413dac1bd48
-	cmake -DCMAKE_INSTALL_PREFIX="$DEPS_PREFIX" -DCMAKE_CXX_FLAGS=-fPIC -DABSL_ENABLE_INSTALL=ON -DABSL_USE_EXTERNAL_GOOGLETEST=ON -DABSL_FIND_GOOGLETEST=ON
+	cmake -DCMAKE_INSTALL_PREFIX="$DEPS_PREFIX" -DCMAKE_CXX_FLAGS=-fPIC -DABSL_ENABLE_INSTALL=ON -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_STANDARD=17 -DABSL_USE_GOOGLETEST_HEAD=OFF  -DCMAKE_POSITION_INDEPENDENT_CODE=ON 
 	make "-j$(nproc)"
 	make install
 	popd