# Set necessary compile and link flags

# C++11 check and activation
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")

	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wno-unknown-pragmas -Wextra -Wno-error=parentheses -pedantic${CMAKE_CXX_FLAGS}")
	set(CMAKE_CXX_FLAGS_DEBUG          "-O0 -g -DETH_DEBUG")
	set(CMAKE_CXX_FLAGS_MINSIZEREL     "-Os -DNDEBUG -DETH_RELEASE")
	set(CMAKE_CXX_FLAGS_RELEASE        "-O3 -DNDEBUG -DETH_RELEASE")
	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -DETH_RELEASE")

	execute_process(
		COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
	if (NOT (GCC_VERSION VERSION_GREATER 4.7 OR GCC_VERSION VERSION_EQUAL 4.7))
		message(FATAL_ERROR "${PROJECT_NAME} requires g++ 4.7 or greater.")
	endif ()

elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")

	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wno-unknown-pragmas -Wextra")
	set(CMAKE_CXX_FLAGS_DEBUG          "-O0 -g -DETH_DEBUG")
	set(CMAKE_CXX_FLAGS_DEBUGSAN       "-O1 -g -fsanitize=address,integer,undefined -fsanitize-blacklist=${CMAKE_SOURCE_DIR}/sanitizer-blacklist.txt -fno-omit-frame-pointer -DETH_DEBUG")
	set(CMAKE_CXX_FLAGS_MINSIZEREL     "-Os -DNDEBUG -DETH_RELEASE")
	set(CMAKE_CXX_FLAGS_RELEASE        "-O3 -DNDEBUG -DETH_RELEASE")
	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -DETH_RELEASE")

	if ("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libstdc++ -fcolor-diagnostics -Qunused-arguments -DBOOST_ASIO_HAS_CLANG_LIBCXX")
	endif()

elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")

	# enable parallel compilation
	# specify Exception Handling Model in msvc
	# disable unknown pragma warning (4068)
	# disable unsafe function warning (4996)
	# disable decorated name length exceeded, name was truncated (4503)
	# disable conversion from 'size_t' to 'type', possible loss of data (4267)
	# disable qualifier applied to function type has no meaning; ignored (4180)
	# disable C++ exception specification ignored except to indicate a function is not __declspec(nothrow) (4290)
	# disable conversion from 'type1' to 'type2', possible loss of data (4244)
	# disable forcing value to bool 'true' or 'false' (performance warning) (4800)
	# disable warning C4535: calling _set_se_translator() requires /EHa (for boost tests)
	# declare Windows XP requirement
	# undefine windows.h MAX && MIN macros cause it cause conflicts with std::min && std::max functions
	# define miniupnp static library
	add_compile_options(/MP /EHsc /wd4068 /wd4996 /wd4503 /wd4267 /wd4180 /wd4290 /wd4244 /wd4800 -D_WIN32_WINNT=0x0501 /DNOMINMAX /DMINIUPNP_STATICLIB)
	# disable empty object file warning
	set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /ignore:4221")
	# warning LNK4075: ignoring '/EDITANDCONTINUE' due to '/SAFESEH' specification
	# warning LNK4099: pdb was not found with lib
	# stack size 16MB
	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /ignore:4099,4075 /STACK:16777216")
else ()
	message(WARNING "Your compiler is not tested, if you run into any issues, we'd welcome any patches.")
endif ()