It's only appropriate to set CMAKE_MAKE_PROGRAM to gmake when we're
using the "Unix Makefiles" generator. On QB, the nodes have Ninja
available and will use it, which means CMAKE_GENERATOR is set to
"Ninja". Setting CMAKE_MAKE_PROGRAM was forcing the build to use gmake
instead of ninja, which was causing the build failure.
Luv is a simple lua binding to libuv, which is now used by neovim lua client.
The bundled luv installation a bit different from other dependencies in that it
is installed two times:
- The "BuildLuv.cmake" script downloads and installs a static version of luv
using its normal cmake build script. This static version will be used later.
- Luv default rockspec is replaced with the alternate under the "rockspecs"
directory(the alternate rockspec plays nicer with neovim build system)
- The alternate rockspec is used to build/install the lua module and make it
available to lua scripts.
