Re: [jamboost] [Q] setting filenames based on platform

From: Ian Fasel (ianfasel_at_[hidden])
Date: 2004-09-09 17:47:51

Vladimir, thanks for the help!

I have something working now, however I have one more
question about this.

Unfortunately it is a requirement of the tool that it
will always add a platform-specific extension to the
output filename. Matlab also stores include files and
libaries in a directory whose path can be determined
by the platform, e.g., $MATLABPATH/mac-includes or
$MATLABPATH/hpux-includes, etc.

So right now, at the top of my mex.jam file, the user
would have to change the value of a variable befoore
building, i.e., 

# Change to glnx if using linux, hpux if HP-UX, etc.
MEXEXTEN = mac ; 
# MEXEXTEN = glnx ; 

Then I use this variable throughout the mex.jam file.
Since I know what the extension should be given the
platform, is there any way for this to be determined
automatically?

I have a similar question about setting a variable
based on the output of a command-line tool
(specifically, xml-config), but I'll put it in a
separate post.

Thanks,
Ian

--- Vladimir Prus <ghost_at_[hidden]> wrote:

> Hi Ian,
> > Hi, I'm a newcomer to Boost.Build, Jam, etc. 
> Please redirect me if
> > this is the wrong forum for this question.
> 
> This is precisely the right forum.
> 
> > I'm trying to use Boost.Build v2 to build MATLAB
> mex files which are
> > compiled from a C++ file and link to several
> libraries built with
> > Boost.Build already. A simple example is
> > mex myfile.cc
> > Which would produce
> > myfile.mexglx on linux,
> > myfile.mexmac on mac,
> > myfile.mexhpux on hpux, etc.
> >
> > A more complex example would be like:
> > mex myfile.cc -L/path/to/mylib -lmylib
> -I/path/to/myincludes -lmat
> > -lm
> >
> > If someone wants to stop me right here and say
> "Its not easy" or "Its
> > so easy here's the code" please do. 
> 
> There's a problem with this. You try to use
> different extension on different 
> platforms. While it's possible, I'm not sure it's
> really needed. Is this a 
> requirement of the tool?
> 
> 
> > Otherwise, my initial impression 
> > from Jam documentation is to create a Jamrules
> file which defines a
> > UserObject rule for going from .cc to .mexXXX. 
> Does this go out the
> > window with Boost.Build, or can I still follow Jam
> documentation?
> 
> :-) This goes out the window. The only part in Jam
> documentation which is 
> relevant is language. For everything else,
> Boost.Build V2 are a better place. 
> See the link from http://boost.org/boost-build2
> 
> I think that your task can be solved as described in
> 
> 
>
http://boost.org/boost-build2/doc/html/bbv2.extender.html#bbv2.extender.intro
> 
> To be more specific, when I run "bjam -n" on the
> attached project, I get this 
> output:
> 
> mex -Ifoo -o bin/gcc/debug/a.mex a.cpp
> 
> I think this can be a start, and you can improve the
> "mex.jam" module 
> according to your needs. Of course, should you have
> further questions or 
> problems, please ask.
> 
> - Volodya
> 
> 

> ATTACHMENT part 2 application/x-zip name=mex.zip

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