Re: chopping Ada source that have preprocessor symbols in them

[Pascal Obry <pascal@obry.net>]

Le 19/02/2013 11:05, Jacob Sparre Andersen a �crit :
> I've looked a little bit at Mercurial and its "subrepos" facility
> (http://mercurial.selenic.com/wiki/Subrepository).  I think it (combined
> with a sensible use of separate bodies) does the trick.
> 
> Taking Janus/Ada with two OS targets and two CPU architectures, you
> would set up a structure like this:
> 
>    Janus_Ada/ - thin build management repository
>       Common/       - subrepo containing source files common to all targets
>       OS_Specific/  - subrepo containing branches for Linux/Windows
>       CPU_Specific/ - subrepo containing branches for ARM/Intel

But this means that to do a fix for multiple OS/CPU (for example adding
a new routine) you have to move branches! This is quite counter
productive and it also means that you cannot do an atomic commit for
related work on different branches.

I do prefer the GNAT way. That is, having files for different OS/CPU on
the same repo with a suffix starting with double _ to avoid having them
picked up by default by the project file (as this is not a standard
naming). Then using the package Naming and some variables you select the
variant you want to use for a specific build.

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