1 /* Compile with: 2 clang -c -g -arch x86_64h -arch x86_64 -arch i386 fat-test.c 3 libtool -static -o libfat-test.a fat-test.o 4 5 to generate a dylib instead: 6 clang -arch ... -arch ... -arch ... -dynamiclib fat-test.o -o fat-test.dylib 7 8 To reduce the size of the fat binary: 9 lipo -thin i386 -o fat-test.i386.o fat-test.o 10 lipo -thin x86_64 -o fat-test.x86_64.o fat-test.o 11 lipo -thin x86_64h -o fat-test.x86_64h.o fat-test.o 12 lipo -create -arch x86_64h fat-test.x86_64h.o -arch x86_64 fat-test.x86_64.o -arch i386 fat-test.i386.o -o fat-test.o -segalign i386 8 -segalign x86_64 8 -segalign x86_64h 8 13 */ 14 #ifdef __x86_64h__ 15 int x86_64h_var; 16 #elif defined(__x86_64__) 17 int x86_64_var; 18 #elif defined(__i386__) 19 int i386_var; 20 #elif defined(__ARM_ARCH_7S__) 21 int armv7s_var; 22 #elif defined(__ARM_ARCH_7A__) 23 int armv7_var; 24 #elif defined(__ARM64_ARCH_8__) 25 int arm64_var; 26 #else 27 #error "Unknown architecture" 28 #endif 29