[boost] Re: Re: Linking to shared library

From: Bart (bartmann.nsd_at_[hidden])
Date: 2005-04-18 13:55:43

On Mon, 18 Apr 2005 18:05:49 +0100, Gander wrote:
> 
> I have these: -
> 
> l /usr/lib/libboost_*date*
> lrwxrwxrwx  1 root root     28 Apr 10 18:42 /usr/lib/libboost_date_time.so.1 
> -> libboost_date_time.so.1.32.0
> -rwxr-xr-x  1 root root 123314 Apr 10 18:39 /usr/lib/libboost_date_time.a
> -rwxr-xr-x  1 root root  74296 Apr 10 
> 18:39 /usr/lib/libboost_date_time.so.1.32.0
> 
> locate 'libboost_date_time.so'
> /usr/lib/libboost_date_time.so.1
> 
> 
> I have re-installed 1.31 and re-compiled days_alive and it's still 
> complaining.
> 

Be careful. I think the days_alive example changed between 1.31 & 1.32. I
don't believe the 1.32 version will compile against the 1.31 library.

> rpm -qpl boost-1.31.0-7.i386.rpm
> /usr/lib/libboost_date_time.a
> /usr/lib/libboost_date_time.so.1.31.0
> 

You are missing the libboost_date_time.so symlink.

I can duplicate your error if I remove the symlink from my lib directory
so I get the following:

libdir has
  libboost_date_time-gcc-1_32.a
  libboost_date_time-gcc-1_32.so.1.32.0

`g++ -I$BOOST_ROOT -Llibdir days_alive.cpp -lboost_date_time-gcc-1_32`
Compiles fine. `stat` shows file size 133276 (statically linked)

Recompile (different command):
`g++ -I$BOOST_ROOT -Llibdir -lboost_date_time-gcc-1_32 days_alive.cpp`
I get the same error you do.

Replace the symlink...
 ` ln -s libboost_date_time-gcc-1_32.so.1.32.0
 libboost_date_time-gcc-1_32.so`

Recompile:
`g++ -I$BOOST_ROOT -Llibdir -lboost_date_time-gcc-1_32 days_alive.cpp`
Compiles fine. `stat` shows file size 78764 (dynamically linked).

When I built the 1.30 srpm, it included the symlink in the rpm file that
was built. I'd say there was an error introduced when the srpm was
assembled. If you add your own symlink everything should be fine.

Bart