--- /dev/null
+
+#if defined(__arm__) || defined(__TARGET_ARCH_ARM)
+ #if defined(__ARM_ARCH_7__) \
+ || defined(__ARM_ARCH_7A__) \
+ || defined(__ARM_ARCH_7R__) \
+ || defined(__ARM_ARCH_7M__) \
+ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 7)
+ #error cmake_ARCH armv7
+ #elif defined(__ARM_ARCH_6__) \
+ || defined(__ARM_ARCH_6J__) \
+ || defined(__ARM_ARCH_6T2__) \
+ || defined(__ARM_ARCH_6Z__) \
+ || defined(__ARM_ARCH_6K__) \
+ || defined(__ARM_ARCH_6ZK__) \
+ || defined(__ARM_ARCH_6M__) \
+ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 6)
+ #error cmake_ARCH armv6
+ #elif defined(__ARM_ARCH_5TEJ__) \
+ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5)
+ #error cmake_ARCH armv5
+ #else
+ #error cmake_ARCH arm
+ #endif
+#elif defined(__aarch64__)
+ #if defined(__ARM_ARCH) && __ARM_ARCH == 8
+ #error cmake_ARCH armv8
+ #else
+ #error cmake_ARCH arm64
+ #endif
+#elif defined(__i386) || defined(__i386__) || defined(_M_IX86)
+ #error cmake_ARCH i386
+#elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64)
+ #error cmake_ARCH x86_64
+#elif defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
+ #error cmake_ARCH ia64
+#elif defined(__ppc__) || defined(__ppc) || defined(__powerpc__) \
+ || defined(_ARCH_COM) || defined(_ARCH_PWR) || defined(_ARCH_PPC) \
+ || defined(_M_MPPC) || defined(_M_PPC)
+ #if defined(__ppc64__) || defined(__powerpc64__) || defined(__64BIT__)
+ #error cmake_ARCH ppc64
+ #else
+ #error cmake_ARCH ppc
+ #endif
+#endif
+
+#error cmake_ARCH unknown