[CMake] Component group specific installation with Makefile

[Yuri V. Timenkov]

On Thursday 07 August 2008 00:43:24 Doug Gregor wrote:
> On Wed, Aug 6, 2008 at 1:55 PM, Yuri V. Timenkov
>
> <ytimenkov at parallels.com> wrote:
> > On Wednesday 06 August 2008 17:43:18 Yann Cointepas wrote:
> >> Hi,
> >>
> >> Is there a way to define component group (or installation type)
> >> specific installation targets in a Makefile ?
> >>
> >> I work on Linux. I have defined three CPack component groups (and/or
> >> installation types) for my project: runtime, devel and doc and I would
> >> like to be able to install all components of each group separately
> >> (for example with make install_doc). I only found a way to install a
> >> single component (not a component group) by defining
> >> CPACK_INSTALL_CMAKE_PROJECTS variable in CMakeLists.txt.
> >
> > If you need to install single component (not group), then you can write
> > simple custom target, which invokes CMake in command mode (look how
> > "install" target implemented in Makefile).
> >
> > I came to conclusion that only CPack can install multiple components. See
> > my last comments in http://public.kitware.com/Bug/view.php?id=6835 about
> > installing arbitrary set of components in CPack. (this is kind of hack in
> > CPack to include in "ALL" target only necessary components).
> >
> > You can write custom make targets which make simple tgz or zip package
> > with CPack and then unpack it.
>
> It seems entirely reasonable to me that cpack_add_component and
> cpack_add_component_group would add install targets
> install-<componentname> and install-<componentgroupname> to makefile
> targets, which just perform the appropriate
>
>   cmake -DCOMPONENT=<componentname> -P cmake_install.cmake
>
> actions. It means that cpack_add_* is somewhat of a misnomer (CPack
> doesn't even come into play with the install targets in the makefile),
> but I think it's useful behavior. Bonus points if you make targets
> like "install-help" and "install-help-<componentname>" provide useful
> documentation.
The problem is that in current implementation only CPack has code which 
optimally installs multiple components.

However, it seems possible to invoke cmake multiple times for each component 
in group to create install_<group> make target.

CPack's abilities just bigger.
>
>   - Doug