g++ build failure

commit 55a6542
branch: master
observed on: Linux/i386
perl Configure.pl --cc=g++|--link=g++|--ld=g++|--optimize

g++ build fails very quickly. Here's an edited version of the tail of
the output:

g++ -I./include -I./include/pmc -D_GNU_SOURCE [ long list of -D and -W
options ] -Wwrite-strings -fvisibility=hidden -Isrc/string -Isrc/ -o
src/string/api.o -c src/string/api.c
In file included from ./include/parrot/parrot.h:242,
from src/string/api.c:28:
./include/parrot/hash.h:324: error: duplicate 'const'
make: *** [src/string/api.o] Error 1

g++ -I./include -I./include/pmc -D_GNU_SOURCE -DHASATTRIBUTE_CONST
[long list -f -D and -W options] -Wwrite-strings -fvisibility=hidden
-Isrc/string -Isrc/ -o src/string/api.o -c src/string/api.c
In file included from ./include/parrot/parrot.h:242,
from src/string/api.c:28:
./include/parrot/hash.h:324: error: duplicate 'const'
make: *** [src/string/api.o] Error 1

This part of .src/hash.c seems suspect:

236 =item C<size_t Parrot_hash_pointer(const void const *p, size_t
hashval)>
237
238 A (weak) perfect hash over pointers.
239
240 =cut
241
242 */
243
244 PARROT_WARN_UNUSED_RESULT
245 PARROT_PURE_FUNCTION
246 size_t
247 Parrot_hash_pointer(ARGIN_NULLOK(const void const *p), size_t hashval)
248 {
249 ASSERT_ARGS(Parrot_hash_pointer)
250 size_t x = (size_t)p;
251 hashval ^= x;

Why the 'const void const *p' at line 247? gcc let this pass, but g++
did not.

plobsing, can you take a look?

Thank you very much.
Jim Keenan

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