Re: [Boost-users] Which URL should I use in ExternalProject_Add

Subject: Re: [Boost-users] Which URL should I use in ExternalProject_Add
From: Fraser Hutchison (fraser.hutchison_at_[hidden])
Date: 2015-02-11 18:47:31

On 11/02/2015 11:07, Yi-Hong Lyu wrote:
> Hello all,
>         
>         I used CMake's ExternalProject_Add to download and build boost
>         in my project. The URL I used is 'http://sourceforge.net/projects/boost/files/boost/1.55.0/boost_1_55_0.zip/download'
>         and it works. However I got an error several days ago like:
>         
>         CMake Error: Problem with archive_read_open_file(): Unrecognized
>         archive format
>         
>         It seems that what I download by CMake becomes 'HTML document,
>         ASCII text' rather than 'Zip archive data, at least v2.0 to
>         extract'. Could you tell me which URL should I use in
>         ExternalProject_Add?
>         
>         Thanks,
>         Yi-Hong
>       
>       
> _______________________________________________
> Boost-users mailing list
> [e-mail]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>     
    
    Hi there,
    
    That URL should work fine.  CMake's ExternalProject_Add function has
    been able to handle zip files for several years as far as I'm
    aware.  I'd suggest ensuring you include the checksum in the command
    (use URL_HASH SHA1=1d479557177c49d74001c904979b60cce8cc2d12 for this
    particular download) in case the zip file is corrupted.
    
    To try and debug the error more efficiently, you can download a copy
    of the boost zip file via a browser (check the hash after
    downloading) and use the full path to that local zip file as the URL
    in the ExternalProject_Add command.
    
    Having said all that, I'd expect any of the other three compressed
    types to be a better choice since they're all significantly
    smaller.  Support for 7z only went in a few months ago, from CMake
    version 3.0.2 I think.
    
    Cheers,
    Fraser.