[CMake] Parsing cmake command line parameters

[Rodolfo Schulz de Lima]

Alexander Neundorf escreveu:
> If you can find some spare time, there is a command argument parser in 
> CMake/Source/kwsys/, which is used e.g. by cpack, but not (yet) by cmake. 
> Using this in cmake is the first step in getting better support for custom 
> command line parameters. A patch would be very welcome.
> Currently I don't have the time.

I think I'll have some spare time to do this on this weekend, I'd be 
glad to help if there's enough coordination to avoid unnecessary work 
duplication.

> Second idea: maybe it would already help if the command line arguments to 
> cmake would be available via a special cmake variable.
> Is there anything which speaks against this, Bill ?

IMHO, we should differentiate between --enable/--disable and 
--with/--without,  like it is on autotools' configure. The former used 
to enable/disable features, the other to compile with/without some 
external library.

There's also the ubiquitous --prefix that should be mapped to 
CMAKE_INSTALL_PREFIX, and the others that commonly appear when we 
execute 'configure --help'.

It should be nice to have a framework to facilitate working with 
enable/disable and with/without. The other common arguments that maps to 
cmake variables should be set up by default.


Regards,
rod