Removed -fopenmp from default setting

CMakeLists.txt

@@ -13,7 +13,7 @@ message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
 
 set(CMAKE_CXX_FLAGS_DEBUG "-std=c++11 -D_DEBUG -g -Wall -Wextra -pedantic -Wcast-align -Wcast-qual -Wconversion -Wdisabled-optimization -Wendif-labels -Wfloat-equal -Winit-self -Winline -Wlogical-op -Wmissing-include-dirs -Wnon-virtual-dtor -Wold-style-cast -Woverloaded-virtual -Wpacked -Wpointer-arith -Wredundant-decls -Wshadow -Wsign-promo -Wswitch-default -Wswitch-enum -Wunsafe-loop-optimizations -Wvariadic-macros -Wwrite-strings ")
 
-set(CMAKE_CXX_FLAGS_RELEASE "-std=c++11 -O3 -fopenmp")
+set(CMAKE_CXX_FLAGS_RELEASE "-std=c++11 -O3")
 
 #include directories
 include_directories(${CMAKE_SOURCE_DIR}/include ${CMAKE_SOURCE_DIR}/thirdparty/cpplapack/include)