Looking for a .so

[Geoffrey Leach]

I have a build that references '-lz'. This fails, because gcc expects
to find libz.so in the library search path. The package that installs
zlib, zlib-1.2.11-21.fc32.x86_64 does not create a symlink from
libz.so.1.2.11

So, is this a bug in the package, or am I missing something? This
package is not the only one that fails to make such a link.

[Andras Simon]

2020-05-31 16:08 UTC+02:00, Geoffrey Leach <geoff(a)hughes.net&gt;:
>  I have a build that references '-lz'. This fails, because gcc
> expects
>  to find libz.so in the library search path. The package that installs
>  zlib, zlib-1.2.11-21.fc32.x86_64 does not create a symlink from
>  libz.so.1.2.11 
I think that you need to install zlib-devel.

Andras

[Tom Horsley]

On Sun, 31 May 2020 16:29:54 +0200
Andras Simon wrote:

>  I think that you need to install zlib-devel. 
Yep, all the symlinks and such you need to build things
are always in the corresponding xxx-devel packages that
go with the original xxx package (almost always, anyway).

[Geoffrey Leach]

On Sun, 31 May 2020 16:29:54 +0200
Andras Simon <szajmi(a)gmail.com&gt; wrote:

>  2020-05-31 16:08 UTC+02:00, Geoffrey Leach <geoff(a)hughes.net&gt;:
>  > I have a build that references '-lz'. This fails, because gcc
>  > expects to find libz.so in the library search path. The package
>  > that installs zlib, zlib-1.2.11-21.fc32.x86_64 does not create a
>  > symlink from libz.so.1.2.11  
>  
>  I think that you need to install zlib-devel.
>  
>  Andras 
Well, I would have sworn ... but no. Installing fixed the problem.
Thanks.

[Michael Schwendt]

On Sun, 31 May 2020 09:02:51 -0700, Geoffrey Leach wrote:

>  On Sun, 31 May 2020 16:29:54 +0200
>  Andras Simon wrote:
>  
>  > 2020-05-31 16:08 UTC+02:00, Geoffrey Leach:  
>  > > I have a build that references '-lz'. This fails, because gcc
>  > > expects to find libz.so in the library search path. The package
>  > > that installs zlib, zlib-1.2.11-21.fc32.x86_64 does not create a
>  > > symlink from libz.so.1.2.11    
>  > 
>  > I think that you need to install zlib-devel.
>  > 
>  > Andras  
>  
>  Well, I would have sworn ... but no. Installing fixed the problem.
>  Thanks. 
"Sworn" what? It's like that for a very, very long time. The .so symlink
is an unversioned build-time file. Hence it's stored in the zlib-devel
subpackage that is needed only when building/developing something based on
zlib. And whereas it can make sense to dlopen that .so at runtime, code that
does that would need to make sure it can handle any API/ABI of the library
the symlink may point at.