path: root/SetFlags.cmake

macro (add_flags_lnk FLAGS)
	set(CMAKE_EXE_LINKER_FLAGS             "${CMAKE_EXE_LINKER_FLAGS}             ${FLAGS}")
	set(CMAKE_EXE_LINKER_FLAGS_DEBUG       "${CMAKE_EXE_LINKER_FLAGS_DEBUG}       ${FLAGS}")
	set(CMAKE_EXE_LINKER_FLAGS_COVERAGE    "${CMAKE_EXE_LINKER_FLAGS_COVERAGE}    ${FLAGS}")
	set(CMAKE_EXE_LINKER_FLAGS_RELEASE     "${CMAKE_EXE_LINKER_FLAGS_RELEASE}     ${FLAGS}")
	set(CMAKE_SHARED_LINKER_FLAGS          "${CMAKE_SHARED_LINKER_FLAGS}          ${FLAGS}")
	set(CMAKE_SHARED_LINKER_FLAGS_DEBUG    "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}    ${FLAGS}")
	set(CMAKE_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_COVERAGE} ${FLAGS}")
	set(CMAKE_SHARED_LINKER_FLAGS_RELEASE  "${CMAKE_SHARED_LINKER_FLAGS_RELEASE}  ${FLAGS}")
	set(CMAKE_MODULE_LINKER_FLAGS          "${CMAKE_MODULE_LINKER_FLAGS}          ${FLAGS}")
	set(CMAKE_MODULE_LINKER_FLAGS_DEBUG    "${CMAKE_MODULE_LINKER_FLAGS_DEBUG}    ${FLAGS}")
	set(CMAKE_MODULE_LINKER_FLAGS_COVERAGE "${CMAKE_MODULE_LINKER_FLAGS_COVERAGE} ${FLAGS}")
	set(CMAKE_MODULE_LINKER_FLAGS_RELEASE  "${CMAKE_MODULE_LINKER_FLAGS_RELEASE}  ${FLAGS}")
endmacro()

macro(add_flags_cxx FLAGS)
	set(CMAKE_CXX_FLAGS          "${CMAKE_CXX_FLAGS} ${FLAGS}")
	set(CMAKE_C_FLAGS            "${CMAKE_C_FLAGS}   ${FLAGS}")
endmacro()

macro(enable_profile)
	# Declare the flags used for profiling builds:
	if (MSVC)
		set (CXX_PROFILING "/Zi")
		set (LNK_PROFILING "/PROFILE /DEBUG")
	else()
		set (CXX_PROFILING "-pg")
		set (LNK_PROFILING "-pg")
	endif()


	# Declare the profiling configurations:
	SET(CMAKE_CXX_FLAGS_DEBUGPROFILE
		"${CMAKE_CXX_FLAGS_DEBUG} ${CXX_PROFILING}"
		CACHE STRING "Flags used by the C++ compiler during profile builds."
		FORCE )
	SET(CMAKE_C_FLAGS_DEBUGPROFILE
		"${CMAKE_C_FLAGS_DEBUG} ${CXX_PROFILING}"
		CACHE STRING "Flags used by the C compiler during profile builds."
		FORCE )
	SET(CMAKE_EXE_LINKER_FLAGS_DEBUGPROFILE
		"${CMAKE_EXE_LINKER_FLAGS_DEBUG} ${LNK_PROFILING}"
		CACHE STRING "Flags used for linking binaries during profile builds."
		FORCE )
	SET(CMAKE_SHARED_LINKER_FLAGS_DEBUGPROFILE
		"${CMAKE_SHARED_LINKER_FLAGS_DEBUG} ${LNK_PROFILING}"
		CACHE STRING "Flags used by the shared libraries linker during profile builds."
		FORCE )
	MARK_AS_ADVANCED(
		CMAKE_CXX_FLAGS_DEBUGPROFILE
		CMAKE_C_FLAGS_DEBUGPROFILE
		CMAKE_EXE_LINKER_FLAGS_DEBUGPROFILE
		CMAKE_SHARED_LINKER_FLAGS_DEBUGPROFILE )

	SET(CMAKE_CXX_FLAGS_RELEASEPROFILE
		"${CMAKE_CXX_FLAGS_RELEASE} ${CXX_PROFILING}"
		CACHE STRING "Flags used by the C++ compiler during profile builds."
		FORCE )
	SET(CMAKE_C_FLAGS_RELEASEPROFILE
		"${CMAKE_C_FLAGS_RELEASE} ${CXX_PROFILING}"
		CACHE STRING "Flags used by the C compiler during profile builds."
		FORCE )
	SET(CMAKE_EXE_LINKER_FLAGS_RELEASEPROFILE
		"${CMAKE_EXE_LINKER_FLAGS_RELEASE} ${LNK_PROFILING}"
		CACHE STRING "Flags used for linking binaries during profile builds."
		FORCE )
	SET(CMAKE_SHARED_LINKER_FLAGS_RELEASEPROFILE
		"${CMAKE_SHARED_LINKER_FLAGS_RELEASE} ${LNK_PROFILING}"
		CACHE STRING "Flags used by the shared libraries linker during profile builds."
		FORCE )
	MARK_AS_ADVANCED(
		CMAKE_CXX_FLAGS_RELEASEPROFILE
		CMAKE_C_FLAGS_RELEASEPROFILE
		CMAKE_EXE_LINKER_FLAGS_RELEASEPROFILE
		CMAKE_SHARED_LINKER_FLAGS_RELEASEPROFILE )
	# The configuration types need to be set after their respective c/cxx/linker flags and before the project directive
	if(MSVC)
		set(CMAKE_CONFIGURATION_TYPES "Debug;Release;DebugProfile;ReleaseProfile" CACHE STRING "" FORCE)
	else()
		set(CMAKE_CONFIGURATION_TYPES "Debug;Release;DebugProfile;ReleaseProfile;Coverage" CACHE STRING "" FORCE)
	endif()
endmacro()

# Add coverage processing, if requested:
if (NOT MSVC)

	if (CMAKE_BUILD_TYPE STREQUAL "COVERAGE")
		message("Including CodeCoverage")
		set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/lib/cmake-coverage/")
		include(CodeCoverage)
	endif()
endif()

# TODO: is this needed? NDEBUG is standard. Also, why are we using _DEBUG?
# Add the preprocessor macros used for distinguishing between debug and release builds (CMake does this automatically for MSVC):
if (NOT MSVC)
	set(CMAKE_CXX_FLAGS_DEBUG    "${CMAKE_CXX_FLAGS_DEBUG}    -D_DEBUG")
	set(CMAKE_C_FLAGS_DEBUG      "${CMAKE_C_FLAGS_DEBUG}      -D_DEBUG")
	set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} -D_DEBUG")
	set(CMAKE_C_FLAGS_COVERAGE   "${CMAKE_C_FLAGS_COVERAGE}   -D_DEBUG")
	set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE}  -DNDEBUG")
	set(CMAKE_C_FLAGS_RELEASE    "${CMAKE_C_FLAGS_RELEASE}    -DNDEBUG")
endif()

if(MSVC)
	# Make build use multiple threads under MSVC:
	add_compile_options(/MP)

	# Make build use Unicode:
	add_compile_definitions(UNICODE _UNICODE)

	# TODO: level 4, warnings as errors
else()
	target_compile_options(
		${CMAKE_PROJECT_NAME} PRIVATE

		# We use a signed char (fixes #640 on RasPi)
		# TODO: specify this in code, not a compile flag:
		-fsigned-char

		# We support non-IEEE 754 FPUs so can make no guarantees about error:
		-ffast-math

		# All warnings:
		-Wall -Wextra

		# TODO: actually fix the warnings instead of disabling them
		# or at least disable on a file-level basis:
		-Wno-unused-parameter -Wno-missing-noreturn -Wno-padded -Wno-implicit-fallthrough
		-Wno-double-promotion

		# This is a pretty useless warning, we've already got -Wswitch which is what we need:
		-Wno-switch-enum
	)

	if(CMAKE_CXX_COMPILE_ID STREQUAL "Clang")
		target_compile_options(
			${CMAKE_PROJECT_NAME}Cuberite PRIVATE

			# Warnings-as-errors only on Clang for now:
			-Werror

			# Weverything with Clang exceptions:
			-Weverything -Wno-error=disabled-macro-expansion -Wno-weak-vtables
			-Wno-exit-time-destructors -Wno-string-conversion -Wno-c++98-compat-pedantic
			-Wno-documentation -Wno-documentation-unknown-command -Wno-reserved-id-macro
			-Wno-error=unused-command-line-argument
		)
	endif()
endif()

# Allow for a forced 32-bit build under 64-bit OS:
if (FORCE_32)
	add_flags_cxx("-m32")
	add_flags_lnk("-m32")
endif()

# Have the compiler generate code specifically targeted at the current machine on Linux:
if(LINUX AND NOT NO_NATIVE_OPTIMIZATION)
	add_flags_cxx("-march=native")
endif()