[PD-dev] Please don't redefine CC and CXX
martin pi
pi at attacksyour.net
Tue Feb 18 17:58:54 CET 2003
changed for dfx
martin
On Tue, 18 Feb 2003, Frank Barknecht wrote:
> Hallo,
>
> I'm in the process of extending the debian/rules file to put more
> externals into Debian packages (into which package isn't decided yet,
> I'm currently using pd-externals for simplicity). New rules are
> attached, they now also build vasp and dfx.
>
> One problem always occurs, and it isn't really solvable without help
> from you, the developers. I need to build all externals with a
> consistent set of compilers. Especially the C++ externals need a lot
> of care. That's why I "export CXX=the_compiler" before building all in
> one go. Now some makefiles overwrite my environmental choice with
> their own choice. I.e. they have something like:
>
> CXX=g++
>
> in their makefiles. This is really annoying. Currently this happens in
> some grill-externals, in dfx and in creb.
>
> There is no need to define this variable as isn't for CC. Both are
> pre-defined by make anyways. From "info make":
>
> >-------<
> Variables Used by Implicit Rules
> ================================
>
> The commands in built-in implicit rules make liberal use of certain
> predefined variables. You can alter these variables in the makefile,
> with arguments to `make', or in the environment to alter how the
> implicit rules work without redefining the rules themselves.
> [...]
> `CC'
> Program for compiling C programs; default `cc'.
>
> `CXX'
> Program for compiling C++ programs; default `g++'.
> >-------<
>
> Now I could put "make CXX=xx" arguments inside the rules file, but I
> would need to do that for every new external in the library, that
> redefines the compilers. Normally I recognize that only, when loading
> the externals fails because the wrong compiler was used.
>
> So here's my call to you developers:
>
> 1.) Please don't redefine CC and CXX! There's absolutely no need to.
> 2.) Please don't use non-standard variables like $(CPLUSPLUS)!
>
> It makes building the externals muchmuch easier.
>
> Thank you for your attentention.
>
> ciao
> --
> Frank Barknecht _ ______footils.org__
>
martin pi
http://attacksyour.net/pi
www.machfeld.net
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