Using BITCODE_GENERATION_MODE.

https://blog.ymyzk.com/2015/10/carthage-and-bitcode/

Author: tarunon

Configurations/APIKit.xcconfig

@@ -12,6 +12,10 @@ SKIP_INSTALL = YES
 SUPPORTED_PLATFORMS = macosx iphoneos iphonesimulator watchos watchsimulator appletvos appletvsimulator
 TARGETED_DEVICE_FAMILY = 1,2,3,4
 
+ENABLE_BITCODE[sdk=iphone*] = YES;
+ENABLE_BITCODE[sdk=watch*] = YES;
+ENABLE_BITCODE[sdk=appletv*] = YES;
+
 LD_RUNPATH_SEARCH_PATHS[sdk=macosx*] = $(inherited) @executable_path/../Frameworks @loader_path/../Frameworks
 LD_RUNPATH_SEARCH_PATHS[sdk=iphone*] = $(inherited) @executable_path/Frameworks @loader_path/Frameworks
 LD_RUNPATH_SEARCH_PATHS[sdk=watch*] = $(inherited) @executable_path/Frameworks @loader_path/Frameworks

Configurations/Debug.xcconfig

@@ -9,7 +9,4 @@ GCC_SYMBOLS_PRIVATE_EXTERN = NO
 MTL_ENABLE_DEBUG_INFO = YES
 ONLY_ACTIVE_ARCH = YES
 SWIFT_OPTIMIZATION_LEVEL = -Onone
-
-ENABLE_BITCODE[sdk=iphone*] = NO;
-ENABLE_BITCODE[sdk=watch*] = NO;
-ENABLE_BITCODE[sdk=appletv*] = NO;
+BITCODE_GENERATION_MODE = marker

Configurations/Release.xcconfig

@@ -5,7 +5,4 @@ ENABLE_NS_ASSERTIONS = NO
 MTL_ENABLE_DEBUG_INFO = NO
 VALIDATE_PRODUCT = YES
 DEBUG_INFORMATION_FORMAT = dwarf-with-dsym
-
-ENABLE_BITCODE[sdk=iphone*] = YES;
-ENABLE_BITCODE[sdk=watch*] = YES;
-ENABLE_BITCODE[sdk=appletv*] = YES;
+BITCODE_GENERATION_MODE = bitcode