ALIGN was defined already:

mysys/crc32/crc32c.cc:390: warning: "ALIGN" redefined
 #define ALIGN(n, m)     ((n + ((1 << m) - 1)) & ~((1 << m) - 1))

In file included from /root/aix/build/include/my_global.h:543,
                 from /root/aix/build/mysys/crc32/crc32c.cc:22:
/opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/8/include-fixed/sys/socket.h:788: note: this is the location of the previous definition
 #define ALIGN(p)                (ulong)((caddr_t)(p) + MACHINE_ALIGNMENT - 1 - \