Re: [Boost-build] Filter a library from the list of libraries?

Subject: Re: [Boost-build] Filter a library from the list of libraries?
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2018-08-21 23:28:26

AMDG

On 08/21/2018 02:49 PM, Kuhl, Brian via Boost-build wrote:
> (Many thanks to Steven on answering my last question so quickly)
> ..
> My next challenge is to remove the -ldl library from the list of libraries handed to the shared library linker a.k.a the link.dll action.
> I'm trying to use MATCH for this with no success.
> 
> 
>     local libraries = [ feature.get-values     <libraries>  : $(options) ] ;
>     toolset.flags clang-vxworks.link     LIBRARIES    : $(libraries) ;
> 
>     # link shared libraries without libld.a
>     for local e in $(libraries)
>     {
>         local dll_libs = [ MATCH "-l(?!dl)\w+" : $(e) ] ;
>     }
>     toolset.flags clang-vxworks.link.dll DLL_LIBS : $(dll_libs) ;
> 
> 
> Could someone identify my issue? (perhaps something in the regex needs escaping?) or perhaps suggest a better method to accomplish the same thing?
> 

"(?!)" is a perlism and is not supported by MATCH.

https://boostorg.github.io/build/manual/develop/index.html#jam.language.rules.builtins.utility._match__

If you just want to remove an option, try
[ set.difference $(libraries) : -ldl ]

In Christ,
Steven Watanabe