Re: [CMake] Parsing cmake command line parameters

2007-12-18 Thread Bill Hoffman

Rodolfo Schulz de Lima wrote:

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.




The real problem with the command line arguments is how to gather them 
up for a project.   I really have yet figured out a clean way to do 
that.  People will want access to all options in the project, but I 
don't see a way to do that...


-Bill
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Re: [CMake] Parsing cmake command line parameters

2007-12-18 Thread James Bigler

Rodolfo Schulz de Lima wrote:

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.


The real problem with the command line arguments is how to gather  
them up for a project.   I really have yet figured out a clean way  
to do that.  People will want access to all options in the project,  
but I don't see a way to do that...


-Bill


What is it that people want beyond - 
DBUILD_THIS_THAT_WHATEVER:BOOL=TRUE could provide?


Do they want: --enable-build_this_that_whatever?

I also don't understand why we have to parse the whole CMakeLists.txt  
structure.  We should treat these command line args like we cache  
variables like CPack does when you configure different builds.


James

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[CMake] Parsing cmake command line parameters

2007-12-17 Thread 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

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