Building static only

[trolfs]

Building on OS X 10.13.6.

I can get the non-implementation code to build statically using:

make -s -j8 static_debug static_release

But doing the same for the implementation code fails:

make -s -j8 -C Default static_debug static_release

The error is:

~/vs-dev/vendor/poco/src/poco-1.9.0/DNSSD ~/vs-dev/build/poco/osx/1.9.0 ~/vs-dev/vendor/poco
make: *** No rule to make target `static_debug'.  Stop.

Which is weird as there is a static_debug: target in .../build/rules/lib.