[PATCH 1/5] cmake: Add descriptor_upbproto library for shared linking Before this change, building upb with the -DBUILD_SHARED_LIBS:BOOL=ON option was failing due to lack of libdescriptor_upbproto.so shared library.
[PATCH 2/5] cmake: Add `upb_` prefix to libraries which can be shared Library names like `reflection` or `handlers` are too general and might be already used by other libraries. To make sure that installing upb shared libraries on the system will not cause any conflicts, this change adds the `upb_` prefix.
[PATCH 4/5] cmake: Add support for installation This change makes use of CMake GNUInstallDirs module and allows one to install upb on the system with `make install` target.
