if(${CMAKE_SYSTEM_NAME} STREQUAL "Emscripten")
    set(EMSCRIPTEN 1)
endif()

if(MSVC)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W4")
    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
else()
    add_definitions(-Wall)
    if(EMSCRIPTEN)
        string(REGEX REPLACE "-O3" "-Os" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
        string(REGEX REPLACE "-O3" "-Os" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
    else()
        string(REGEX REPLACE "-O3" "-O2" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
        string(REGEX REPLACE "-O3" "-O2" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
    endif()
    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -fno-omit-frame-pointer")
    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fno-omit-frame-pointer")
endif()

if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Release")
endif()

string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
if(CMAKE_BUILD_TYPE_LOWER STREQUAL "release")
    add_definitions(-DNDEBUG)
endif()

# Prevent shared libraries has "lib" prefix on Windows DLL files
if(WIN32)
    set(CMAKE_SHARED_LIBRARY_PREFIX "")
endif()