gcc doesn't build on ppc

[Mike Stump]

gcc doesn't build on powerpc-apple-darwin9:

/Volumes/mrs3/net/gcc-darwinO2/./prev-gcc/xgcc 
-B/Volumes/mrs3/net/gcc-darwinO2/./p
rev-gcc/ -B/Volumes/mrs3/Packages/gcc-061208/powerpc-apple-darwin9/bin/ -c   -g 
-O2
 -mdynamic-no-pic -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes 
-Wmissing
-prototypes -pedantic -Wno-long-long -Wno-variadic-macros 
-Wno-overlength-strings -
Wold-style-definition -Wmissing-format-attribute -Werror -fno-common   
-DHAVE_CONFI
G_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include 
-I./../int
l -I../../gcc/gcc/../libcpp/include  -I../../gcc/gcc/../libdecnumber 
-I../libdecnum
ber    \
                ../../gcc/gcc/config/rs6000/rs6000.c -o rs6000.o
cc1: warnings being treated as errors
../../gcc/gcc/config/rs6000/rs6000.c: In function 
‘rs6000_emit_vector_compare’:
../../gcc/gcc/config/rs6000/rs6000.c:11904: warning: ISO C90 forbids mixed 
declarat
ions and code
make[3]: *** [rs6000.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm cpp.pod gcc.pod
make[2]: *** [all-stage2-gcc] Error 2
make[1]: *** [stage2-bubble] Error 2
make: *** [all] Error 2

:-(