CVS 1.11p1 build under Solaris 7 (RETSIGTYPE)

[Jeff Blaine]

Using either Forte 6.1's C compiler or GNU CC 2.9.1, I sadly cannot get
CVS to compile under Solaris 7 (!!!) out of the box:

% ./configure --enable-server --without-gssapi
...
% make
...
cc -DHAVE_CONFIG_H -I. -I. -I.. -I../src -I../src      -DWITH_PAM -c -o
savecwd.o `test -f savecwd.c || echo './'`savecwd.c
source='sighandle.c' object='sighandle.o' libtool=no \
depfile='.deps/sighandle.Po' tmpdepfile='.deps/sighandle.TPo' \
depmode=none /bin/sh ../depcomp \
cc -DHAVE_CONFIG_H -I. -I. -I.. -I../src -I../src      -DWITH_PAM -c -o
sighandle.o `test -f sighandle.c || echo './'`sighandle.c
"sighandle.c", line 68: syntax error before or at: RETSIGTYPE
"sighandle.c", line 68: function cannot return function or array
"sighandle.c", line 68: cannot recover from previous errors
cc: acomp failed for sighandle.c