Re: Building exe with same sources, but not same define....

From: TEMPLIE Cédric (cedric.templie_at_[hidden])
Date: 2005-01-05 04:09:05

TEMPLIE Cédric wrote:
> Vladimir Prus wrote:
> 
>>On Monday 03 January 2005 14:02, TEMPLIE Cédric wrote:
>>
>>
>>
>>>I want to build 2 exe with same sources, the only difference is a DEFINE
>>>tag, I do the following, but there is an error...
>>>
>>># Build the project from source files
>>>exe SendBug
>>
>>........
>>
>>
>>> <define>INTERNAL_BUILD
>>>;
>>>
>>># Build the project from source files (public version)
>>>exe SendBug_public
>>
>>.....
>>
>>
>>> <define>PUBLIC_BUILD
>>>;
>>>
>>>The following error occured :
>>>
>>>error: Duplicate name of actual target:
>>><pbin\msvc\debug\threading-multi>Base64.obj
>>>error: previous virtual target { msvc%msvc.compile.c++-Base64.OBJ {
>>>Base64.CPP } }
>>>error: created from
>>>error: another virtual target { msvc%msvc.compile.c++-Base64.OBJ {
>>>Base64.CPP } }
>>>error: created from
>>>error: added properties: <define>PUBLIC_BUILD
>>>error: removed properties: <define>INTERNAL_BUILD
>>>
>>>I understand why, but I don't need a specific variant to build that,
>>>what can I do ?
>>
>>
>>You have two approaches. 
>>
>>1. Introduce a new feature:
>>
>> feature my_public_build : yes no : propagated composite ;
>> feature.compose <my_public_build>yes : <define>PUBLIC_BUILD ; 
>> feature.compose <my_public_build>no : <define>INTERNAL_BUILD ;
>>
>>The 'my_public_build' feature will be present in target path, and you'll be 
>>able to compile a single source with two values of the feature.
>>
>>2. Explicitly change the locations for the two exes in questions:
>>
>> exe SendBug : ... : <location-prefix>SendBug ......
>> exe SendBug_public : .... : <location-prefix>SendBug_public .......
>>
>>This will add additional element in front of target path and error will 
>>disappear too.
>>
>>The preferred variant depends on your use case. If public/internal distinction 
>>makes sense for a lot of targets, I'd use feature. If it's only relevant to 
>>SendBug exe, I'd use location-prefix.
> 
> 
> I use the 2nd solution, and it works, thank you very much.
> 
> But I don't know why, know insteand of building only the exe, it builds 
> also a lib... do you know why ?
> 
>

I saw that it is when I build using qt, it also build a lib, and not 
only the executable... why ?

Thx

TEMPLIE Cédric

> 
>>HTH,
>>Volodya
>>
>> 
>>
>>
>>
>>>Thanks again
>>>
>>>TEMPLIE Cédric
>>>
>>>
>>>
>>>
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>>>
>>>
>>
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