Re: [Boost-build] Problem with include directory for generated .cfile

From: Jurko Gospodnetić (jurko.gospodnetic_at_[hidden])
Date: 2008-02-20 19:43:00

   Hi Alex.

> Hi, I've done it before - in my embedsql rule I convert <include>
> generated by bjam to "-I" option required by cpre compiler:
> 
> type.register ESQL : SC ;
> generators.register-standard embedsql.embedsql : ESQL : CPP ;
> 
> rule embedsql ( target : source : properties * )
> {
>     local r = [ property.select <include> : $(properties) ] ;
>     if $(r)
>     {
>         # Extract <include> directories from $(properties)
>         # and replace "<include>" with "-I" to pass to cpre
>         local r_ = [ regex.replace-list $(r) : "<include>" : "-I" ] ;
>         PREFIX_OPT on $(<) = $(r_) ;
>     }
> }
> 
> actions embedsql
> {
>     cpre $(PREFIX_OPT) -Cansi_c -O$(<) $(>)
> }

   Ick... this seems ugly. I do not use ESQL so I do not understand the 
code completely but the idea od manually changing Boost Build's 
generated properties seems 'strange'.

   If you really found a need for this then could you please explain it 
in more detail? And possibly add a bug report/feature request?

   Could you not have used the Boost Build flag support to propagate 
those <include> feature values to your actions - similar to how C++ 
compiler and linker actions do this? For an example see the 
tools/msvc.jam file and how it handles the <include> properties by using 
the flags rule to make their values available in the action as the 
INCLUDES target variable.

   Many thanks.

   Best regards,
     Jurko Gospodnetić