On 7/26/07, Brandon Van Every <[EMAIL PROTECTED]> wrote:
On 7/26/07, Christian Convey <[EMAIL PROTECTED]> wrote:
> On 7/26/07, Alexander Neundorf <[EMAIL PROTECTED]> wrote:
> > On Thursday 26 July 2007 11:58, Christian Convey wrote:
> > > Hi Alex,
> > >
> > > Wouldn't the command:
> > > cmake -DCMAKE_INSTALL_COMPONENT=Headers -P cmake_install.cmake
> > >
> > > overwrite the very makefiles that are executing that command? If so,
> >
> > No, -P means cmake will just execute the given cmake script, i.e. it will
not
> > generate makefiles or project files etc.
>
> OK, so "-P" means that cmake won't produce a new Makefile.
>
> But don't I *need* to create a new Makefile? I thought the goal was
> to produce a new Makefile whose "install" target has been affected by
> the "-DCMAKE_INSTALL_COMPONENT=Headers" argument.
>
> If "-P" prevents the creation of a new Makefile, it sounds like we're
> discarding the very Makefile that we're trying to create.
>
> Would you mind clarifying?
The CMake generator creates your Makefile and a bunch of other support
files and scripts, including cmake_install.cmake. If you choose to
manually execute cmake_install.cmake via a custom command, you're
merely using what the generator already created, and invoking it the
same way the Makefile does. By default, the script would just install
everything. By passing -DCMAKE_INSTALL_COMPONENT=Headers, you're
getting a different behavior out of it. Nothing will explode because
it's all code the generator produced anyways.
Thanks, I didn't realize that the cmake program did any of the work
when running 'make'. I thought 'cmake' was executed only when
producing (or rebuilding) the Makefiles, and otherwise was completely
out of the picture when the user invokes 'make'.
So Alex provided this command-line:
cmake -DCMAKE_INSTALL_COMPONENT=Headers -P cmake_install.cmake
I've seen "DESTDIR=..." used with "make install". Can I safely use it
(with the expected results) with the cmake command? For example:
cmake -DDESTDIR=/some/path/ -DCMAKE_INSTALL_COMPONENT=Headers -P
cmake_install.cmake
And more generally, can I usually assume that any Makefile variable
assignments that work with "make install", such as:
"make install FOO=BAR"
will have the same effect in this command?
"cmake -DFOO=BAR -P cmake_install.cmake"
Thanks,
Christian
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