Bug#839987: libcompress-raw-lzma-perl: Version Mismatch due to new src:xz-utils

[gregor herrmann]

Control: tag -1 + confirmed

On Fri, 07 Oct 2016 09:56:28 +0300, Niko Tyni wrote:

> As noticed by the autopkgtest checks at ci.debian.net, this library
> can't be used on current sid/amd64 anymore.
> 
>   # perl -e 'use Compress::Raw::Lzma'
>   Subroutine Compress::Raw::Lzma::constant redefined at /usr/lib/x86_64-linux-gnu/perl5/5.24/Compress/Raw/Lzma.pm line 165.
>   Subroutine Compress::Raw::Lzma::lzma_version_number redefined at /usr/lib/x86_64-linux-gnu/perl5/5.24/Compress/Raw/Lzma.pm line 165.
> [...]
>   Subroutine Compress::Raw::Lzma::Options::DESTROY redefined at /usr/lib/x86_64-linux-gnu/perl5/5.24/Compress/Raw/Lzma.pm line 165.
>   Version Mismatch - Built with version 50010000, library used is version 50020022
>   Compilation failed in require at -e line 1.
>   BEGIN failed--compilation aborted at -e line 1.
>  
> This is clearly caused by the new liblzma5 (src:xz-utils) in sid. We seem
> to need either tighter (preferably binNMU-safe) versioned dependencies
> or disabling the version check.

I tend to disabling the version check. liblzma5 has a proper symbols
file which is used by dh_shlibdeps/dpkg-shlibdeps, so we should be
safe, I guess.
 
> Not sure what triggered all the warnings but it's presumably related.

Probably ...

eval {
    require XSLoader;
    XSLoader::load('Compress::Raw::Lzma', $XS_VERSION);
    1;
} 
or do {
    require DynaLoader; 
    local @ISA = qw(DynaLoader);
    bootstrap Compress::Raw::Lzma $XS_VERSION ; # ← line 165
};


Cheers,
gregor

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