Boost-Build :

spam_at_[hidden]

-- 
Paul McMahon <spam_at_[hidden]>
> AMDG
> 
> Paul McMahon wrote:
> > If I have an install rule like this in my Jamfile:
> >
> > install dist: /common/foobar//foobar :
> > <location>$(INSTALL_ROOT)/usr/local/lib ;
> >
> > (and a default value for INSTALL_ROOT is defined in my Jamroot),
> >
> > how do I overide the value of INSTALL_ROOT on the command line?
> >
> > I tried -s option for bjam but didn't seem to have the desired effect.
> >
> > I'm calling bjam from a higher level build script that needs to set
> > INSTALL_ROOT.
> >   
> 
> This doesn't work because -s sets INSTALL_ROOT in the
> global module, which is, therefore, not visible in the context
> of the Jamfile.
> 
> So... In Jamroot, you can do this (untested):
> 
> import path ;
> import modules ;
> 
> # look up INSTALL_ROOT in the global module.
> install-root = [ modules.peek : INSTALL_ROOT ] ;
> if $(install-root)
> {
>     # Make sure that it is bound relative to the current working directory
>     # rather than relative to the location of Jamroot.
>     install-root = [ path.root [ path.make $(install-root) ] [ path.pwd 
> ] ] ;
> }
> else
> {
>     # The default value
>     install-root = default/install/root ;
> }
> 
> # make INSTALL_ROOT visible in all subprojects
> path-constant INSTALL_ROOT : $(install-root) ;
> 
> In Christ,
> Steven Watanabe
> 
>