Re: [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.henn...@canonical.com]
> Sent: Wednesday, January 27, 2016 1:55 AM
> To: Johnson, Matt (GE Healthcare)
> Cc: cmake@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)
>  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=CwIFAg=IV_clAzoPDE253xZdHuilRgztyh
> _RiV3wUrLrDQYWSI=qts7iZJBjQRtedrrcqcDRKGTou2a2ZKSs95InlFGa34
> =PrIOuKSVt-ib8BwXCLUzXhcXKOaI-nPRE3lR3m-
> XYH8=2LvLkrDkWzloxqrrBP6UdCiiL0YnWgmToNjL2_5mZTw= ), 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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Re: [CMake] What is the best way to handle Boost dependencies in a package config file

[Johnson, Matt (GE Healthcare)]

> -Original Message-
> From: Ruslan Baratov [mailto:ruslan_bara...@yahoo.com]
> Sent: Wednesday, January 27, 2016 2:18 AM
> To: Johnson, Matt (GE Healthcare)
> Cc: cmake@cmake.org
> Subject: Re: [CMake] What is the best way to handle Boost dependencies in
> a package config file
> 
> On 27-Jan-16 09:54, Johnson, Matt (GE Healthcare) 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=CwIC-
> g=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI=qts7iZJBjQRtedrrc
> qcDRKGTou2a2ZKSs95InlFGa34=h5ntMfnYSIOG1mQp_twkUPunK5Nz0q9
> HBqa7Ld4B_hs=zi9sk8NwKokHEqrLyGA5a_yrRxLdHF9P7ID23wgrWPY=
> ), 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.
> >
> Just for your information you can use "file://" links instead of regular
> "https://urldefense.proofpoint.com/v2/url?u=http-3A__=CwIC-
> g=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI=qts7iZJBjQRtedrrc
> qcDRKGTou2a2ZKSs95InlFGa34=h5ntMfnYSIOG1mQp_twkUPunK5Nz0q9
> HBqa7Ld4B_hs=ts63TtZeGvflnLyyJ8pKESTjxabuzNCPmS0fGn_1L7E= " in
> both hunter.cmake and HunterGate so there is no need to "go out" - you can
> be completely offline.
> 
> Ruslo

Ruslo - thanks for that.  I'm seriously going to look into Hunter more.  From 
my cursory glance at it, it's a seriously impressive bit of cmake scripting.

Can  I ask you a few follow ups? 
1. in the case of boost, what it is doing is using the find package module, 
then creating import targets based off the information.  Correct?
2. If I require a newer version of boost than what is listed in the gate file, 
I'd need to  update hunter.cmake and HunterGate,  correct?
3. If I want to distribute my package to others, they too would need  to use 
Hunter, correct?  Since boost doesn't have a package config file in  its 
distribution, the dependency targets (e.g. Boost::regex) wouldn't exist on 
their system)  Any tips on this? 

Thanks again for your hard  work on  Hunter.  I've done a bit of cmake to 
download and install some dependencies in the past.  Yours is WAY nicer than 
what I came up with. 

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

[Ruslan Baratov via CMake]

On 27-Jan-16 20:08, Johnson, Matt (GE Healthcare) wrote:

-Original Message-
From: Ruslan Baratov [mailto:ruslan_bara...@yahoo.com]
Sent: Wednesday, January 27, 2016 2:18 AM
To: Johnson, Matt (GE Healthcare)
Cc: cmake@cmake.org
Subject: Re: [CMake] What is the best way to handle Boost dependencies in
a package config file

On 27-Jan-16 09:54, Johnson, Matt (GE Healthcare) 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=CwIC-
g=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI=qts7iZJBjQRtedrrc
qcDRKGTou2a2ZKSs95InlFGa34=h5ntMfnYSIOG1mQp_twkUPunK5Nz0q9
HBqa7Ld4B_hs=zi9sk8NwKokHEqrLyGA5a_yrRxLdHF9P7ID23wgrWPY=
), 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.
Just for your information you can use "file://" links instead of regular
"https://urldefense.proofpoint.com/v2/url?u=http-3A__=CwIC-
g=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI=qts7iZJBjQRtedrrc
qcDRKGTou2a2ZKSs95InlFGa34=h5ntMfnYSIOG1mQp_twkUPunK5Nz0q9
HBqa7Ld4B_hs=ts63TtZeGvflnLyyJ8pKESTjxabuzNCPmS0fGn_1L7E= " in
both hunter.cmake and HunterGate so there is no need to "go out" - you can
be completely offline.

Ruslo

Ruslo - thanks for that.  I'm seriously going to look into Hunter more.  From 
my cursory glance at it, it's a seriously impressive bit of cmake scripting.

--



Can  I ask you a few follow ups?
1. in the case of boost, what it is doing is using the find package module, 
then creating import targets based off the information.  Correct?
In general yes, but also some information passed from 
ExternalProject_Add recipe, like optional dependency. So it differs from 
approach "just add BoostConfig.cmake file" after boost installed.

Templates:
* 
https://github.com/ruslo/hunter/blob/master/cmake/templates/BoostConfig.cmake.in
* 
https://github.com/ruslo/hunter/blob/master/cmake/templates/BoostBZip2Dependency.cmake.in 
(optional boost.iostreams -> bzip2 dependency)



2. If I require a newer version of boost than what is listed in the gate file, 
I'd need to  update hunter.cmake and HunterGate,  correct?
URL/SHA1 of HunterGate command doesn't hold version of Boost to be 
precise. It holds version of archive with several versions of Boost 
(Boost/hunter.cmake: 1.55, 1.56, ...) and default version 
(configs/default.cmake: 1.58). User can choose non-default version by 
adding custom local config.cmake file: 
https://github.com/ruslo/hunter/wiki/example.custom.config.id. If you 
need version that is not listed in Boost/hunter.cmake you have to add it 
to Boost/hunter.cmake and create new archive. There is feature request 
that can allow to do it locally so it will be improved in future.



3. If I want to distribute my package to others, they too would need  to use 
Hunter, correct?  Since boost doesn't have a package config file in  its 
distribution, the dependency targets (e.g. Boost::regex) wouldn't exist on 
their system)  Any tips on this?
Well somebody have to install such extra code with Boost::* targets 
anyway, the easiest way is to delegate this job to Hunter. Also if you 
add your package to Hunter archive then users can add your package just 
by `hunter_add_package(Foo)` without even knowing about Boost and type 
of Boost targets. This is package distribution design.



Thanks again for your hard  work on  Hunter.  I've done a bit of cmake to 
download and install some dependencies in the past.  Yours is WAY nicer than 
what I came up with.

Matt


Thanks, Ruslo
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Re: [CMake] What is the best way to handle Boost dependencies in a package config file

[Michi Henning]

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) 
>  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://github.com/ruslo/hunter), 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
> 
> 
> -- 
> 
> Powered by www.kitware.com
> 
> Please keep messages on-topic and check the CMake FAQ at: 
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> information on each offering, please visit:
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Re: [CMake] What is the best way to handle Boost dependencies in a package config file

[Ruslan Baratov via CMake]

On 27-Jan-16 09:54, Johnson, Matt (GE Healthcare) 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://github.com/ruslo/hunter), 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.

Just for your information you can use "file://" links instead of regular 
"http://; in both hunter.cmake and HunterGate so there is no need to "go 
out" - you can be completely offline.


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

[Johnson, Matt (GE Healthcare)]

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://github.com/ruslo/hunter), 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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