Re: how to install library in a specific directory?

[John Calcote]

On 7/23/2009 4:28 AM, A117 wrote:
> Why don't I need to run ldconfig manually after installing other official softwares, like osip2? I 
> tried "ldconfig -p" and saw the library was aware of, i.e., listed, before running 
> "ldconfig". But linkage could not find the library then.
>    

Linux distro installers execute ldconfig for you. If you look carefully, 
you'll see that the last stage of installing software (either new or 
updated) is to run ldconfig. On my Opensuse 11.1 Linux installation, 
when I install new software packages from within YaST, I can see 
ldconfig's output just before the installation process completes. If you 
use RPM manually, you may have to run ldconfig yourself after installing 
packages in order to pick up the changes immediately.

> And can I ask another question? I want to build some source code files into 
> this library and need to distribute some other files, too. But EXTRA_DIST in 
> Makefile.am does not work as below,
> lib_LTLIBRARIES = libezcommon.la
> ...
> libezcommon_la_SOURCES = ezcommon.cpp tinystr.cpp ...
> EXTRA_DIST = tinyxml.txt ezcommon.rc ...
>
> If I write only one file in libezcommon_la_SOURCES, while adding others to 
> EXTRA_DIST and others' .o to libezcommon_la_LIBADD, it works. I don't know why.
>    

I'm  sorry, I don't understand the question. Are you trying to generate 
sources, or optional build some sources? Perhaps a bit more context on 
the problem...

> Thanks for your patience.
>
> ----- -----
>    
> > On 7/22/2009 9:15 PM, A117 wrote:
> >      
> > > Thank you. I've decided to put the library in /usr/local/lib, while its header 
> > > files in /usr/local/include/ezproject.
> > > It's strange though /usr/local/lib is in /etc/ld.so.conf (actually in another 
> > > file it includes), and I can build other programs acting much as mine, I have 
> > > difficulty with mine only. I run ldconfig manually and then it works. Now I'm 
> > > releasing my software.
> > >
> > >        
> > ldconfig updates the library cache. the /etc/ld.so.conf file is the file
> > used by ldconfig to determine which directories to scan for libraries.
> > When you add a new library to one of the directories in /etc/ld.so.conf,
> > then you need to run ldconfig to ensure that the cache is aware of that
> > new library.
> >
> > John
> >      
>
>
>
>