Add example for cross-compiling to Nintendo Switch

Cross Compiling configuration for the Nintendo Switch, it requires Nintendo SDK

build_config/nintendo_switch.rb

+# Cross Compiling configuration for the Nintendo Switch, it requires Nintendo SDK
+# Tested on windows
+MRuby::CrossBuild.new('nintendo_switch_32bit') do |conf|
+		conf.toolchain :clang
+		NINTENDO_SDK_PATH = ENV['NINTENDO_SDK_ROOT']
+	
+		include_paths = [
+			"#{NINTENDO_SDK_PATH}/Include",
+			"#{NINTENDO_SDK_PATH}/Common/Configs/Targets/NX-NXFP2-a32/Include"
+		]
+	
+		conf.cc do |cc|
+			cc.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/bin/nx-clang++"
+			cc.include_paths += include_paths
+			cc.flags += ['-fpic -fno-short-enums -ffunction-sections -fdata-sections -fno-common -fno-strict-aliasing -fomit-frame-pointer -fno-vectorize -funsigned-char -O2 -g -mno-implicit-float']
+			cc.defines += 'NN_SDK_BUILD_RELEASE'
+		end
+	
+		conf.cxx do |cxx|
+			cxx.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/bin/nx-clang++"
+			cxx.include_paths += include_paths
+			cxx.flags += ['-fpic -fno-short-enums -ffunction-sections -fdata-sections -fno-common -fno-strict-aliasing -fomit-frame-pointer -fno-vectorize -funsigned-char -O2 -g -mno-implicit-float']
+			cxx.defines += 'NN_SDK_BUILD_RELEASE'
+		end
+	
+		conf.archiver do |archiver|
+			archiver.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/nx/armv7l/bin/llvm-ar"
+		end
+	
+		conf.linker do |linker|
+			linker.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/nx/armv7l/bin/clang++"
+			linker.libraries = []
+		end
+	
+		# Add your mrbgems
+end
+
+MRuby::CrossBuild.new('nintendo_switch_64bit') do |conf|
+		conf.toolchain :clang
+		NINTENDO_SDK_PATH = ENV['NINTENDO_SDK_ROOT']
+	
+		include_paths = [
+			"#{NINTENDO_SDK_PATH}/Include",
+			"#{NINTENDO_SDK_PATH}/Common/Configs/Targets/NX-NXFP2-a64/Include"
+		]
+	
+		conf.cc do |cc|
+			cc.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/bin/nx-clang++"
+			cc.include_paths += include_paths
+			cc.flags += ['-fpic -fno-short-enums -ffunction-sections -fdata-sections -fno-common -fno-strict-aliasing -fomit-frame-pointer -fno-vectorize -funsigned-char -O2 -g -mno-implicit-float']
+			cc.flags << '--target=aarch64-nintendo-nx-elf'
+			cc.defines += 'NN_SDK_BUILD_RELEASE'
+		end
+	
+		conf.cxx do |cxx|
+			cxx.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/bin/nx-clang++"
+			cxx.include_paths += include_paths
+			cxx.flags += ['-fpic -fno-short-enums -ffunction-sections -fdata-sections -fno-common -fno-strict-aliasing -fomit-frame-pointer -fno-vectorize -funsigned-char -O2 -g -mno-implicit-float']
+			cxx.flags << '--target=aarch64-nintendo-nx-elf'
+			cxx.defines += 'NN_SDK_BUILD_RELEASE'
+		end
+	
+		conf.archiver do |archiver|
+			archiver.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/nx/aarch64/bin/llvm-ar"
+		end
+	
+		conf.linker do |linker|
+			linker.command = "#{NINTENDO_SDK_PATH}/Compilers/NX/nx/aarch64/bin/clang++"
+			linker.libraries = []
+		end
+	
+		# Add your mrbgems
+end