Re: [Log4cplus-devel] linking error

[drkmkzs <dr...@gm...>]

ok, thanks for precision :)


2014-03-03 23:06 GMT+01:00 Václav Zeman <vha...@gm...>:

> On 03/03/2014 05:59 PM, drkmkzs wrote:
> > Thank for help,
> >
> > But i was explicitely linking with lib4cplusU DLL when linking my
> > application with my static lib.
> >
> > Indeed my error was to forget to add some cmake definition for unicode
> > in my cmake, as in the examples...
> >
> > So after that, it was ok except my app didn't compile, when logging some
> > trace using glibmm methods...
> >
> > So for the moment, I have recompiled log4cplus without unicode support,
> > removed the definitions in my cmake, and all compile well  (except for
> > some bad things from my side). What is the unicode option for ? I guess
> > to treat specific type as unicode compliant types ?
>
> The Unicode option serves the same purpose as the UNICODE (and _UNICODE)
> preprocessor symbols do in Windows headers. They switch between char and
> wchar_t in the API. When it is not defined, all the interfaces take
> chars and std::strings. When it is defined, all the interfaces take
> wchar_ts and std::wstrings.
>
> >
> >
> > 2014-02-28 19:36 GMT+01:00 Václav Zeman <vha...@gm...
> > <mailto:vha...@gm...>>:
> >
> >     On 02/28/2014 06:42 PM, drkmkzs wrote:
> >     > Hello,
> >     >
> >     > I'm trying to use log4cplus on windows7, with MinGW, but I am
> >     > expericencing some problems ...
> >     >
> >     > I tried the 1.1.3-rc1 and 1.1.2, it has the same behaviour.
> >     >
> >     > Compilation of log4cplus is OK with Cmake, i have my
> >     > liblog4cplusU.dll, so far, cool :)
> >     >
> >     > In my app i create a static lib that links to the
> liblog4cplusU.dll,
> >     > it's ok.
> >     >
> >     > But when my exe tries to link with my static library, i have some
> >     > error "undefined reference to
> >     > `_imp___ZN9log4cplus6Logger11getInstanceERKSs'" I have checked that
> >     > my CmakeList of my exe has correct link and libraries directory
> >     > specified ...
> >     >
> >     > I have read some thread :
> >     >
> >
> http://stackoverflow.com/questions/2848556/c-project-compiles-as-static-lib-fails-linker-error-as-dynamic-lib-why
> >     >
> >     >  I tried to add definitions in my Cmake ( LOG4CPLUS_BUILD_DLL,
> >     > log4cplus_EXPORTS, DLL_EXPORT) , but it didn't change anything ....
> >     >
> >     > Am I missing anything ?
> >
> >     I suspect that when you are linking your static library to your
> >     executable, it does not pull in the dependency on the log4cplus DLL
> >     import library. Try linking your executable specifically to
> >     liblog4cplusU.a, or whatever is the correct log4cplus DLL import
> library
> >     file name.
>
> --
> VZ
>
>
>
>
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