[CMake] What is the best way to handle Boost dependencies in a package config file

[Johnson, Matt (GE Healthcare)]

Thanks for the reply, Michi.  Forgive me if I'm missing something - how does this help with your package config file?  Doesn't Boost_LIBRARIES contain full paths to  the component libraries you listed?  My understanding is that in order to have a package config file result in something that can be relocated, I'd need to be able to do something like:

find_package(Boost CONFIG COMPONENTS system filesystem regex REQUIRED)
target_link_libraries(my_target Boost::system Boost::filesystem  Boost::regex)

That is, the  find package would have to create imported targets for the boost dependencies.  As far as I know, FindBoost.cmake does not do this.  Please correct me if I'm wrong - that would make me  most happy! 

Thanks again for the help.

Matt

> -----Original Message-----
> From: Michi Henning [mailto:michi.henning at canonical.com]
> Sent: Wednesday, January 27, 2016 1:55 AM
> To: Johnson, Matt (GE Healthcare)
> Cc: cmake at cmake.org
> Subject: Re: [CMake] What is the best way to handle Boost dependencies in
> a package config file
> 
> We use this, which works fine for me on Ubuntu:
> 
> find_package(Boost COMPONENTS system filesystem regex serialization
> thread log REQUIRED)
> 
> Cheers,
> 
> Michi.
> 
> > On 27 Jan 2016, at 12:54 , Johnson, Matt (GE Healthcare)
> <Matthew.Johnson1 at med.ge.com> wrote:
> >
> > I like package config files.  I want to use more of them.  However, I have a
> dependency on boost.  While boost has a Find module, it doesn't have a
> package config file.  I'm not going to be able to depend on the users of my
> package building boost via cmake (also, is that still an active thing?).
> >
> > It seems like the best I could hope for is to generate the package config file,
> then hack it up to deal with the boost stuff.  Has anyone already solved this
> problem or have any tips?  I found this Hunter package manager
> (https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__github.com_ruslo_hunter&d=CwIFAg&c=IV_clAzoPDE253xZdHuilRgztyh
> _RiV3wUrLrDQYWSI&r=qts7iZJBjQRtedrrcqcDRKGTou2a2ZKSs95InlFGa34&m
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> XYH8&s=2LvLkrDkWzloxqrrBP6UdCiiL0YnWgmToNjL2_5mZTw&e= ), but it
> seems a bit heavyweight when all I want is boost.  Also, I can't have my build
> system going out and downloading the packages - they all have to come from
> an internal source.
> >
> > Thanks,
> > Matt
> >
> >
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