diffutils build on Solaris

[SiKing]

This might be lightly out of date.  If so, please ignore the bother ...

I am trying to build diffutils 2.7 on several Solaris machines:
Sun Ultra-60 running Solaris 2.6 using gcc 2.95.2
Sun Ultra-80 running Solaris 2.7 using gcc 2.95.2
Sun Ultra-80 running Solaris 2.8 (32b mode) using gcc 2.95.2

Here are the compile steps that I am using:
cd diffutils-build
../diffutils-2.7/configure --prefix=/usr/local/tools --disable-shared >&
configure.log
make CFLAGS='-O' >& make.log
make check >& make_check.log
make install >& make_install.log

The check fails with:
/usr/local/tools/bin/diff: not found
./diff3: subsidiary diff failed
make: *** [check] Error 2
This is abovious since I have not yet installed it.  No big deal; when I
run the check AFTER install, then everything passes.

Mark L.