Re: [Boost-build] Please review my current prototype of porting from make to BB

From: Daniel Einspanjer (deinspanjer_at_[hidden])
Date: 2006-02-02 15:47:46

This is fantastic input and exactly the sort of tips I was hoping to hear.
Thank you so much for pointing these things out!

If anyone else has some feedback, I'd love to hear more.

Daniel

"Phillip Seaver" <phil_at_[hidden]> wrote in message 
news:43E23E20.3050003_at_apago.com...
> Daniel Einspanjer wrote:
>> I have a presentation to my engineering team tomorrow where-in I hope to
>> demonstrate to them some of the advantages of moving away from makefiles 
>> to
>> BB.  The other alternative on the table is ant + cpptasks.
>>
> Hopefully, by "tomorrow" you mean Friday.
>
> I don't know about the best way to do it, since I'm not an expert.  I'll
> give my opinion, though.  :-)
>
> You could shorten your Jamfile a good bit by doing things like:
>
> local NTDEFINES = _WIN _USE_32BIT_TIME_T WIN32_LEAN_AND_MEAN _WIN32 WIN32 
> _WIN _WIN32_WINNT=0x0500
>
>
> ..and replace the long list with "<os>NT:<define>$(NTDEFINES)"
> http://public.perforce.com/public/jam/src/Jam.html#varexp
>
> The defines that depend on build parameters can be done with a feature.
> To borrow from the "variant" feature:
>
> feature demobuild : : implicit composite propagated symmetric ;
> feature.compose <demobuild>internal : <define>_AN_INTERNAL_BUILD ;
> feature.compose <demobuild>acme : <define>CUSTOMER=Acme ;
>
>
> Then, you can do "bjam demobuild=internal" or even "bjam internal" (due
> to the "implicit" above) to do the builds with _AN_INTERNAL_BUILD
> defined.  A potential downside to that is that everything will be built
> separately just like debug and release builds.  I haven't quite figured
> out yet how to apply a feature like this to selected projects and how to
> selectively propagate it to projects that are used by it.
>
> As for things like "<variant>debug:<define>DEBUG", I have them in my
> Jamroot as well.  I have _DEBUG defined for debug builds and NDEBUG
> defined for release builds.  It seems like a good place to put them to
> me.  I also have "build-dir ../bbuild" on the project in Jamroot so that
> everything gets built outside of the source tree.
>
> I think the "<os>NT:<cflags>/wd####" lines are specific to Visual C++ .
> So, I believe you want "<toolset>msvc:<cflags>...."
>
> Good luck!  I hope this helps.
>
> Phillip Seaver
>
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