CMake: Use modern CMake, use math without bounds-checking for speed

Signed-off-by: Marcus Müller <[email protected]>

CMakeLists.txt

@@ -1,15 +1,6 @@
 cmake_minimum_required(VERSION 3.25)
-project(NBP_jupyter)
-
+project(NBP_jupyter CXX)
 set(CMAKE_CXX_STANDARD 17)
-FIND_PACKAGE(OpenMP)
-if(OPENMP_FOUND)
-    message("OPENMP FOUND")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OpenMP_EXE_LINKER_FLAGS}")
-endif()
-include_directories(.)
 
 add_executable(NBP_jupyter
         simulateFER.cpp
@@ -18,8 +9,25 @@ add_executable(NBP_jupyter
         helpers.cpp
         )
 
+find_package(OpenMP)
+if(OPENMP_FOUND)
+    target_link_libraries(NBP_jupyter PUBLIC OpenMP::OpenMP_CXX)
+endif()
+
+
 if(MSVC)
     target_compile_options(NBP_jupyter PRIVATE /W4 /WX)
 else()
-    target_compile_options(NBP_jupyter PRIVATE -Wall -Wextra -Wpedantic -ffast-math)
+    target_compile_options(NBP_jupyter PRIVATE -Wall -Wextra -Wpedantic)
+endif()
+
+include(CheckCXXCompilerFlag)
+check_cxx_compiler_flag("-ffast-math" fastmath)
+if(fastmath)
+    target_compile_options(NBP_jupyter PRIVATE -ffast-math)
+endif()
+
+check_cxx_compiler_flag("-funsafe-math-optimizations" veryfastmath)
+if(veryfastmath)
+    target_compile_options(NBP_jupyter PRIVATE -funsafe-math-optimizations)
 endif()