added pre compiled header (#66)

* added pre compiled header
* added cmake version check and updated readme

Hurrican/CMakeLists.txt

@@ -519,6 +519,14 @@ include_directories(${CMAKE_SOURCE_DIR}/src/SDLPort)
 include_directories(${CMAKE_SOURCE_DIR}/3rdparty/glm)
 add_executable(${PROJECT_NAME} ${HURRICAN_SOURCES})
 
+# Enable pre compiled headers for way better compile times
+OPTION(USE_PRECOMPILED_HEADERS "Enable pre compiled headers for better compile times" ON)
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.16")
+    if(USE_PRECOMPILED_HEADERS)
+        target_precompile_headers(${PROJECT_NAME} PRIVATE src/stdafx.hpp)
+    endif()
+endif()
+
 OPTION(OPENMPT "Use OPENMPT for ImpulseTracker music file decoding" OFF)
 IF(OPENMPT)
     ADD_DEFINITIONS(-DUSE_OPENMPT)

README.md

@@ -47,9 +47,10 @@ Sound
 * -DOPENMPT=ON            : Use the libopenmpt code for music (SDL2_mixer uses libmodplug while SDL_mixer uses the lower quality mikmod engine)
 
 Generic
-* -DFAST_RANDOM=OFF       : Use standard C random function in place of the fast [LCG](https://en.wikipedia.org/wiki/Linear_congruential_generator)
-* -DFAST_TRIG=ON          : Use fast approximation for trigonometric functions
-* -DDISABLE_EXCEPTIONS=ON : Disable exception handling to reduce binary size
+* -DFAST_RANDOM=OFF             : Use standard C random function in place of the fast [LCG](https://en.wikipedia.org/wiki/Linear_congruential_generator)
+* -DFAST_TRIG=ON                : Use fast approximation for trigonometric functions
+* -DDISABLE_EXCEPTIONS=ON       : Disable exception handling to reduce binary size
+* -DUSE_PRECOMPILED_HEADERS=ON  : Enable pre-compiled headers for better compile time
 
 Debug
 * -DDISABLE_MEMPOOLING=ON : Bypass pooled memory manager