[Scons-users] Dividing SConstruct code into set of aliases; no code called by default

[Bill Deegan]

Once again I'll refer you to the manpage and look at "ARGUMENTS"

-Bill

On Tue, Oct 21, 2014 at 6:07 AM, Faheem Mitha <faheem at faheem.info> wrote:

>
> Hi Dirk,
>
> On Tue, 21 Oct 2014, Dirk Bächle wrote:
>
>  from what you wrote here, I understand that you want to know how the
>> "SCons way" of expressing this kind of build looks. So, the way the
>> framework is designed and implemented you usually don't care about
>> wrapping builders into blocks, that you then try to control
>> yourself. You leave the decision about which sources changed, and
>> therefore which targets need to be rebuilt, to SCons (after all,
>> that's why you use a build system and don't write shell scripts,
>> right?). You do this by simply specifying which environments and
>> builders should get used for creating all your targets. And *all*
>> means all here...
>>
>
>  Then, from this kind of "forest of target trees", you select the
>> concrete outputs that you want to get compiled/created in this run
>> by specifying their names as arguments on the command-line.
>>
>
>  If no dependencies have changed, SCons will detect that they're
>> up-to-date...so they don't get rebuilt.
>>
>
> I see, so what I want to do is possibly not supported.
>
> Ok. It seems I don't really gain anything from wrapping up collections
> of builders info functions, so I've settled for having everything in
> "global" namespace, and just pointing an Alias to a suitable
> collection of objects, like so.
>
> One question: is there a way to have scons default to help. so just
> typing `scons` has the same result as `scons -h`?
>
> Thanks.
>
>                                                  Regards, Faheem Mitha
>
> ############################################################
> #######################################
> [...]
> boost_python_env.Program(target='simann_ex',
> source=common+["simann_ex.cc"])
> boost_python_env.SharedLibrary(target='corrmodel/cpplib',
> source=common+pif)
> boost_python_env.SharedLibrary(target='score_test',
> source=["score_test.cc", "cpparr_conv_pif.cc"])
> boost_python_env.Program(target="pval_test", source=["pval_test.cc"]+
> common+pif)
> boost_python_env.Program(target="pval_stat", source=["pval_stat.cc"]+
> common+pif)
> boost_python_env.Alias('bp', ['simann_ex', 'corrmodel/cpplib.so',
> 'pval_test', 'pval_stat'])
>
> env = Environment()
> env.Command(target="MANUAL.pdf", source="MANUAL", action="pandoc MANUAL
> -o MANUAL.pdf")
> env.Alias('man', ['MANUAL.pdf'])
> ############################################################
> #######################################
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>
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