[Bug target/64624] New: ppc64 build failure, ISA_2_7_MASKS_SERVER not declared

["anton at samba dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64624

            Bug ID: 64624
           Summary: ppc64 build failure, ISA_2_7_MASKS_SERVER not declared
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anton at samba dot org

I'm seeing this build error as of:

            * config/rs6000/default64.h (TARGET_DEFAULT) [LITTLE_ENDIAN]: Use
            ISA 2.7 (POWER8).

g++ -c   -g -O2 -DIN_GCC    -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/.
-I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include 
-I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../gcc/gcc/../libbacktrace   -o options.o -MT options.o
-MMD -MP -MF ./.deps/options.TPo options.c
In file included from tm.h:30:0,
                 from options.c:7:
../../gcc/gcc/config/rs6000/default64.h:23:25: error: âISA_2_7_MASKS_SERVERâ
was not declared in this scope
 #define TARGET_DEFAULT (ISA_2_7_MASKS_SERVER | MASK_POWERPC64 | MASK_64BIT |
MASK_LITTLE_ENDIAN)
                         ^
options.c:828:3: note: in expansion of macro âTARGET_DEFAULTâ
   TARGET_DEFAULT, /* rs6000_isa_flags */
   ^