Hamlib now used libusb-1.0 and since that is available on Windows we
can now build with it across platforms. This change allows for that if
the custom USB backends are configured in Hamlib.
As it looks like Hamlib v3.1 will be suitable for WSJT-X this change
also puts in place what is needed to link to a Hamlib SO/DLL/DYLIB
when required. This is switched on by not defining the CMake variable
hamlib_STATIC. This could be used on Windows and Mac but Linux still
must have Hamlib statically linked due to repository versions being
too old.
For now Hamlib remains statically linked for consistency across
platforms.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6581 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
Mac builds require that Qt be built from sources since the binary Qt
package is built against the clang libstdc++ C++ support library and
we need it built against the more modern libc++ C++ support library.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4963 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
