["Carlos Wijders" <computec@sr.net>] libc/968: 'make check' fails with glibc-2.1

[Andreas Jaeger]

We now have three reports all reporting that isomac fails during make
check.

Andreas Schwab said in a slightly different context on libc-hacker
(Thread: <signal.h> broken with _POSIX_SOURCE=1 defined):
> What's wrong with make installcheck?  That's part of the GNU makefile
> standards.

I propose to add `make installcheck' for isomac.

Andreas