CRC32 on AIX

mysys/CMakeLists.txt

@@ -129,7 +129,7 @@ ELSEIF(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
         COMPILE_FLAGS "-march=armv8-a+crc+crypto")
     ENDIF()
   ENDIF()
-ELSEIF(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64|powerpc64")
+ELSEIF(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64|powerpc64" OR CMAKE_SYSTEM_NAME MATCHES AIX)
   SET(MYSYS_SOURCES ${MYSYS_SOURCES} crc32/crc32_ppc64.c crc32/crc32c_ppc.c)
   SET_SOURCE_FILES_PROPERTIES(crc32/crc32_ppc64.c crc32/crc32c_ppc.c PROPERTIES
         COMPILE_FLAGS "${COMPILE_FLAGS} -maltivec -mvsx -mpower8-vector -mcrypto -mpower8-vector")

mysys/crc32/crc32c.cc

@@ -491,6 +491,17 @@ static int arch_ppc_probe(void) {
 
   return arch_ppc_crc32;
 }
+#elif _AIX
+static int arch_ppc_probe(void) {
+  arch_ppc_crc32 = 0;
+
+#if defined(__powerpc64__)
+  // AIX 7.1+ has vector crypto features on all POWER 8+
+  arch_ppc_crc32 = 1;
+#endif /* __powerpc64__ */
+
+  return arch_ppc_crc32;
+}
 #endif  // __linux__
 
 static bool isAltiVec() {