CMake: Detect platform MacOS. How?

[bogong]

Hello all!

In my project need to be defined specified pieces of code for each of platform:

if(IOS)
	message(WARNING "iOS Build")
elseif(ANDROID)
	message(WARNING "Android Build")
elseif( (!!!) OSX|MAC|MACOSX )
	message(WARNING "MacOS build")
else()
	message(WARNING "Undefined build")
endif()

The question is which keyword need to be used for detecting MacOS? Been testing: "MAC", "MACOS" and "MACOSX". Nothing working properly. For iOS and Android all is working properly.

[bogong]

Solution found. Issue closed.
There need to be added in CMake file something like this:

if(IOS)
	if(${CMAKE_OSX_SYSROOT} MATCHES "iphonesimulator")
		if (${CMAKE_OSX_ARCHITECTURES} MATCHES "arm64")
			message("-- iOS Build for simulator arm64")
		elseif(${CMAKE_OSX_ARCHITECTURES} MATCHES "x86_64")
			message("-- iOS Build for simulator x86_64")
		endif()
	elseif(${CMAKE_OSX_SYSROOT} MATCHES "iphoneos")
		message("-- iOS Build for iphone")
	else()
		message(FATAL_ERROR"-- iOS undefined build")
	endif()
elseif(ANDROID)
	if(${ANDROID_ABI} STREQUAL "x86_64")
		message("-- Android Build for x86_64")
	elseif(${ANDROID_ABI} STREQUAL "x86")
		message("-- Android Build for x86")
	elseif(${ANDROID_ABI} STREQUAL "armeabi-v7a")
		message("-- Android Build for armeabi-v7a")
	elseif(${ANDROID_ABI} STREQUAL "arm64-v8a")
		message("-- Android Build for arm64-v8a")
	else()
		message(FATAL_ERROR "-- Android undefined build")
	endif()
elseif(${CMAKE_OSX_SYSROOT} MATCHES "\/MacOSX.platform\/Developer\/SDKs")
	message("-- MacOS Build")
else()
	message(FATAL_ERROR "-- Undefined build")
endif()

or use this:

if(IOS)
	if(${CMAKE_OSX_SYSROOT} MATCHES "iphonesimulator")
		if (${CMAKE_OSX_ARCHITECTURES} MATCHES "arm64")
			message("-- iOS Build for simulator arm64")
		elseif(${CMAKE_OSX_ARCHITECTURES} MATCHES "x86_64")
			message("-- iOS Build for simulator x86_64")
		endif()
	elseif(${CMAKE_OSX_SYSROOT} MATCHES "iphoneos")
		message("-- iOS Build for iphone")
	else()
		message(FATAL_ERROR"-- iOS undefined build")
	endif()
elseif(ANDROID)
	if(${ANDROID_ABI} STREQUAL "x86_64")
		message("-- Android Build for x86_64")
	elseif(${ANDROID_ABI} STREQUAL "x86")
		message("-- Android Build for x86")
	elseif(${ANDROID_ABI} STREQUAL "armeabi-v7a")
		message("-- Android Build for armeabi-v7a")
	elseif(${ANDROID_ABI} STREQUAL "arm64-v8a")
		message("-- Android Build for arm64-v8a")
	else()
		message(FATAL_ERROR "-- Android undefined build")
	endif()
elseif(APPLE)
	if(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86_64")
		message("-- MacOS Build for x86_64")
	elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "arm64")
		message("-- MacOS Build for arm64")
	else()
		message(FATAL_ERROR "-- MacOS undefined build")
	endif()
else()
	message(FATAL_ERROR "-- Undefined build")
endif()