Re: An easy way to add a feature?

From: Zbynek Winkler (zwin_at_[hidden])
Date: 2003-12-17 10:24:13

Now, that I have everything working I'd like to have file 
user-settings.jam where the prefered defaults could be set/changed. What 
would be the best way to do this? As I understand it now - when I do not 
specify <arit> in the definition of exe main, the test-lib with 
<arit>float is used because the "float" value is declared first, right? 
I'd like the user-settings.jam to be somewhat similar to the configure 
parametrs enabling/disabling some features of my project.

Thanks for your help.

Zbynek

PS. Feel free to use the examples attached any way you prefer (maybe add 
something to the v2/example dir?).
-- 
http://zw.matfyz.cz/ http://robotika.cz/
Faculty of Mathematics and Physics, Charles University, Prague, Czech 
Republic
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name="Jamfile"
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filename="Jamfile"
project : requirements <link>static ;
exe main : main.cpp test-lib ;
lib test-lib : test-lib.cpp : <arit>double ;
lib test-lib : test-lib.cpp : <arit>float ;
lib test-lib : test-lib.cpp : <arit>fixed ;
lib test-lib : test-lib.cpp : <arit>debug ;
 --------------050409010908000207020403 Content-Type: text/plain;
name="main.cpp"
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filename="main.cpp"
int main(int argc, char* argv[])
{
return 0;
}
 --------------050409010908000207020403 Content-Type: text/plain;
name="project-root.jam"
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filename="project-root.jam"
import feature : feature compose ;
feature arit 
: float double fixed debug 
: propagated link-incompatible composite symmetric 
;
feature.compose <arit>float : <define>ARIT_FLOAT ;
feature.compose <arit>double : <define>ARIT_DOUBLE ;
feature.compose <arit>fixed : <define>ARIT_FIXED ;
feature.compose <arit>debug : <define>ARIT_DEBUG ;
import user-settings ;
 --------------050409010908000207020403 Content-Type: text/plain;
name="test-lib.cpp"
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Content-Disposition: inline;
filename="test-lib.cpp"

# user sets the default value for <arit>
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