Bugzilla Bug 171178

the powerpc sys/ucontext.h has a struct member named '__unused' in the 64bit
case

file sets up a define '__unused' for using __attribute__((__unused__)) ... the
two quickly conflict and cause a build failure:

if /bin/sh ../libtool --tag=CC --mode=compile powerpc64-unknown-linux-gnu-gcc
-DHAVE_CONFIG_H -I. -I. -I..  -DMAGIC='"/usr/share/misc/file/magic"'   -O2
-pipe -D_GNU_SOURCE -MT compress.lo -MD -MP -MF ".deps/compress.Tpo" -c -o
compress.lo compress.c; \
        then mv -f ".deps/compress.Tpo" ".deps/compress.Plo"; else rm -f
".deps/compress.Tpo"; exit 1; fi
 powerpc64-unknown-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I..
-DMAGIC=\"/usr/share/misc/file/magic\" -O2 -pipe -D_GNU_SOURCE -MT compress.lo
-MD -MP -MF .deps/compress.Tpo -c compress.c  -fPIC -DPIC -o .libs/compress.o
In file included from /usr/include/signal.h:351,
                 from /usr/include/sys/wait.h:31,
                 from compress.c:47:
/usr/include/sys/ucontext.h:101: error: expected identifier or '(' before '['
token
/usr/include/sys/ucontext.h:102: error: expected ';' before 'int'
make: *** [compress.lo] Error 1

fixed in cvs and mailed upstream