[openssl-users] build.info

[Richard Levitte]

We currently don't have per-engine support of the kind.  The cleanest
you can do is probably having a private config looking something like
this:

    our %targets = (
    	'mytarget' => {
	    inherit_from	=> [ 'whatever' ],
	    dso_ldflags		=> '-lsomelib'
	}
    );

Cheers,
Richard

In message <CALs+mqaiQAXoS88AVJBJyeod0mgegocfDMb7eaoivVLTDO=BxA at mail.gmail.com> on Tue, 4 Sep 2018 11:05:27 -0700, Thomás Inskip <tinskip at gmail.com> said:

> Thanks. That is correct. I'd like to specify -lsomellib for just one engine target in engines/build.info.
> 
> On Tue, Sep 4, 2018 at 12:12 AM Jakob Bohm <jb-openssl at wisemo.com> wrote:
> 
>  On 04/09/2018 08:55, Wouter Verhelst wrote:
>  > On 9/3/18 9:05 PM, Thomás Inskip wrote:
>  >> Does anyone know how I can specify that a specific shared library (in
>  >> this case an engine) is dependent on a system-installed shared
>  >> library (i.e. not built along with openssl)?. Basically the
>  >> equivalent of LDFLAGS += -lsomelib
>  > The GNU runtime dynamic library will honor DT_NEEDED flags of
>  > libraries, too. That is, you can just do LDFLAGS += -lsomelib on a
>  > library target and it will work. Check libgtk-3.so, for instance:
>  >
>  > objdump -x /usr/lib/x86_64-linux-gnu/libgtk-3.so
>  >
>  > will show a bunch of lines like...
>  >
>  > Dynamic Section:
>  > NEEDED libgdk-3.so.0
>  > NEEDED libgmodule-2.0.so.0
>  > NEEDED libpangocairo-1.0.so.0
>  > NEEDED libX11.so.6
>  > NEEDED libXi.so.6
>  > NEEDED libXcomposite.so.1
>  > NEEDED libXdamage.so.1
>  > (...)
>  >
>  > Meaning, all these libraries need to be loaded for libgtk-3.so to work.
>  >
>  > Beware gotchas:
>  >
>  > - Not all rtdl implementations do so, so if you're not using a GNU
>  > platform (e.g., Linux), then check the documentation of your runtime
>  > dynamic linker.
>  > - This works for shared libraries, but not for static ones.
>  >
>  > Regards,
>  >
>  Please note that the OP is apparently asking how to specify
>  -lsomelib using the OpenSSL-specific build system, not the
>  general meaning of using shared libraries on POSIX systems.
> 
>  Enjoy
> 
>  Jakob
>  --
>  Jakob Bohm, CIO, Partner, WiseMo A/S. https://www.wisemo.com
>  Transformervej 29, 2860 Søborg, Denmark. Direct +45 31 13 16 10
>  This public discussion message is non-binding and may contain errors.
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