Can't link to libpopt

Can't link to libpopt

[Trevor Barton]

Hi,

I am trying to use libpopt but I can't link to it using -lpopt to gcc 
because libpopt.a doesn't exist in /lib or /usr/lib.

I have an up-to-date 64 bit installation and I have all of 
libpopt-common, libpopt-devel and libpopt0 installed at the current 
version 1.16.2.  In my /lib and /usr/lib directories I have 
libpopt.dll.a, but no libpopt.a, unlike, for example, libreadline, which 
has libreadline.a and libreadline.dll.a.

I can link successfully using -lpopt.dll however.  I presume, but can't 
seem to find any information, that linking against libThing.a and 
libThing.dll.a, where both are available, gives wither a static or 
dynamic link?

I always used to be able to link against libpopt.a, but I think that was 
always in an older 32bit installation, I may never have tried to build 
this program in the 64-bit environment.

Can anyone give me any pointers please?  Can I generate libpopt.a 
somehow?  Or should it really be there and there is an error in the 
cygwin package?

Cheers,
Trevor

-- 
Isotek Oil and Gas Ltd., 9 Clayton Wood Bank, Leeds, LS16 6QZ, UK.
Tel: +44 (113) 275 1339  Web: www.isotek.co.uk
Views expressed are my own and not necessarily those of Isotek Oil and Gas Ltd.


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Re: Can't link to libpopt

[Marco Atzeri]

On 08/01/2018 17:07, Trevor Barton wrote:
> Hi,
> 
> I am trying to use libpopt but I can't link to it using -lpopt to gcc 
> because libpopt.a doesn't exist in /lib or /usr/lib.
> 
> I have an up-to-date 64 bit installation and I have all of 
> libpopt-common, libpopt-devel and libpopt0 installed at the current 
> version 1.16.2.  In my /lib and /usr/lib directories I have 
> libpopt.dll.a, but no libpopt.a, unlike, for example, libreadline, which 
> has libreadline.a and libreadline.dll.a.
> 
> I can link successfully using -lpopt.dll however.  I presume, but can't 
> seem to find any information, that linking against libThing.a and 
> libThing.dll.a, where both are available, gives wither a static or 
> dynamic link?
> 
> I always used to be able to link against libpopt.a, but I think that was 
> always in an older 32bit installation, I may never have tried to build 
> this program in the 64-bit environment.
> 
> Can anyone give me any pointers please?  Can I generate libpopt.a 
> somehow?  Or should it really be there and there is an error in the 
> cygwin package?
> 
> Cheers,
> Trevor

install popt-devel

https://cygwin.com/cgi-bin2/package-cat.cgi?file=x86_64%2Fpopt-devel%2Fpopt-devel-1.16-1&grep=libpopt.a

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Re: Can't link to libpopt

[Trevor Barton]

On 08/01/2018 18:43, Marco Atzeri wrote:
> On 08/01/2018 17:07, Trevor Barton wrote:
>> Hi,
>>
>> I am trying to use libpopt but I can't link to it using -lpopt to gcc 
>> because libpopt.a doesn't exist in /lib or /usr/lib.
>>
>> I have an up-to-date 64 bit installation and I have all of 
>> libpopt-common, libpopt-devel and libpopt0 installed at the current 
>> version 1.16.2.  In my /lib and /usr/lib directories I have 
>> libpopt.dll.a, but no libpopt.a, unlike, for example, libreadline, 
>> which has libreadline.a and libreadline.dll.a.
>>
>> I can link successfully using -lpopt.dll however.  I presume, but 
>> can't seem to find any information, that linking against libThing.a 
>> and libThing.dll.a, where both are available, gives wither a static 
>> or dynamic link?
>>
>> I always used to be able to link against libpopt.a, but I think that 
>> was always in an older 32bit installation, I may never have tried to 
>> build this program in the 64-bit environment.
>>
>> Can anyone give me any pointers please?  Can I generate libpopt.a 
>> somehow?  Or should it really be there and there is an error in the 
>> cygwin package?
>>
>> Cheers,
>> Trevor
>
> install popt-devel
>
> https://cygwin.com/cgi-bin2/package-cat.cgi?file=x86_64%2Fpopt-devel%2Fpopt-devel-1.16-1&grep=libpopt.a 
>

Thanks Marco.  However that's marked as obsolete in the installer and 
replaced by libpopt-devel.  Also the version for that is 1.16.1 I think, 
whereas he current version is 1.16.2.  The 1.16.2 version is empty and 
just shows an obsolete message on cygwin.com ...

https://cygwin.com/packages/x86_64/popt-devel/popt-devel-1.16-2

Trevor

-- 
Isotek Oil and Gas Ltd., 9 Clayton Wood Bank, Leeds, LS16 6QZ, UK.
Tel: +44 (113) 275 1339  Web: www.isotek.co.uk
Views expressed are my own and not necessarily those of Isotek Oil and Gas Ltd.


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Re: Can't link to libpopt

[Steven Penny]

On Mon, 8 Jan 2018 18:53:13, Trevor Barton wrote:
> Thanks Marco.  However that's marked as obsolete in the installer and 
> replaced by libpopt-devel.  Also the version for that is 1.16.1 I think, 
> whereas he current version is 1.16.2.  The 1.16.2 version is empty and 
> just shows an obsolete message on cygwin.com ...

I can repro these problems:

1. popt: obsolete
2. popt-devel: obsolete
3. libpopt0: only has the DLL
4. libpopt-devel: libpopt.dll.a only
4. libpopt-common: /usr/share/doc and /usr/share/locale only
5. mingw64-x86_64-popt: has libpopt.a, but only for native builds
6. mingw64-i686-popt: has libpopt.a, but only for native builds

You might post an issue here:

http://github.com/cygwinports/popt

but good luck - Yaakov is not keen on fixing these type issues:

http://github.com/cygwinports/mingw64-x86_64-expat/issues/1
http://github.com/cygwinports/mingw64-x86_64-fdk-aac/issues/1
http://github.com/cygwinports/mingw64-x86_64-lua/issues/1
http://github.com/cygwinports/mingw64-x86_64-nghttp2/issues/1
http://github.com/cygwinports/mingw64-x86_64-pcre/issues/1


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Re: Can't link to libpopt

[Trevor Barton]

On 08/01/2018 19:32, Steven Penny wrote:
>
> You might post an issue here:
>
> http://github.com/cygwinports/popt
>
> but good luck - Yaakov is not keen on fixing these type issues:
>
Nevertheless he fixed my problem, and very quickly too; I was linking 
with -static, removing that meant that -lpopt works as expected without 
having libpopt.a available.  I have no idea why I had -static on the 
linker line, I don't normally use static links and can't remember 
putting it there, I must have done so for some reason at some point though.

I was wondering why I couldn't find any evidence of anyone else having 
this problem on the Internet, I couldn't believe I was the only person 
linking against popt in the world.  Turns out I might be the only idiot 
though :)

Thanks Steven and Yaakov.
Trevor

-- 
Isotek Oil and Gas Ltd., 9 Clayton Wood Bank, Leeds, LS16 6QZ, UK.
Tel: +44 (113) 275 1339  Web: www.isotek.co.uk
Views expressed are my own and not necessarily those of Isotek Oil and Gas Ltd.


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