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Re: How to handle data/script files in a VPATH build ?

From: Sylvestre Ledru
Subject: Re: How to handle data/script files in a VPATH build ?
Date: Tue, 09 Feb 2010 19:00:51 +0100

Hello Ralf,

As usual, thanks for your answer.

Le samedi 06 février 2010 à 18:56 +0100, Ralf Wildenhues a écrit : 
> Hello Sylvestre,
> * Sylvestre Ledru wrote on Sat, Feb 06, 2010 at 06:49:38PM CET:
> > Le mercredi 03 février 2010 à 11:27 -0500, Peter Johansson a écrit :
> > > > I cannot change top_builddir by top_srcdir since I need both the data
> > > > and script to be available in the build tree.
> > > 
> > > Are myscript and myData.sci distributed or built? 
> > > Why do you need them in the build tree?
> > Both, I need them at building time: myscript calls the binaries to
> > transform the myData.sci to myData.bin.
> > And they are both needed for my application at runtime.
> Can you let your script use $srcdir/myData.sci instead of myData.sci?
I wish but I can't, I need them within the builddir.

> Typically, there are two ways to get out of the VPATH problem: either
> prefix all paths in your tools with the right ones, (this can usually be
> done more elegantly if the tool has some -I<dir> flag to amend its search
> path, like a preprocessor), or copy all files to the build tree
> somewhere.  If you decide to do the latter, then please use a different
> name from the file name in the source tree (or a different relative
> directory), so that `make' rebuilding rules will not be messed up later
> by looking at the copied file.
> E.g.:
> data-in-build-tree: data-in-source-tree
>         cp $(srcdir)/data-in-source-tree data-in-build-tree
Hmm, I have more than 7000 data files and their names are relevant :/
(Like in java with the name of the object which matches the filename)

It is going to be tricky to handle on such number of files ...


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