Re: Accounting for -rpath when libtool isn't helping

[Roumen Petrov]

Hi Paul,

Paul "LeoNerd" Evans wrote:
> [SNIP]
> Alternatively, am I looking at this from the wrong direction? Maybe the
> problem is that the exporting library isn't providing -Wl,-rpath in
> its .pc file, to assist anyone else who wasn't using libtool to link it
> (such as is the case here).
No , I don't think that this is valuable.


> With that in mind, I now generate those if required, in the little
> shell fragment I use to create the .pc file:
>
> #!/bin/sh
>
> LIBS='-L${libdir} -ltickit'
> CFLAGS='-I${includedir}'
>
> case "$LIBDIR" in
>    /usr/lib) ;;
>    /usr/local/lib) ;;
>    *)
>      LIBS="$LIBS -Wl,-rpath -Wl,$LIBDIR"
>      ;;
> esac
>
> cat <<EOF
> libdir=$LIBDIR
> includedir=$INCDIR
>
> Name: tickit
> Description: Terminal Interface Construction KIT
> Version: 0.2
> Libs: $LIBS
> Cflags: $CFLAGS
> EOF

Like you perl (first email) and shell (above) scripts libtool do similar 
to decide when to add "runpath" linker flag. Libtool parses 
/etc/ld.so.conf and "build-in default paths" and if a library path is 
not in list adds "runpath" flag.

On most platform you control this via variable 
lt_cv_sys_lib_dlsearch_path_spec. Pattern *_cv_* mean that this is a 
"autoconf cache variable" and "lt" is custom namespace prefix.

Add $HOME/lib to list to avoid -rpath flag.


For some autoconf builds with use of libtool you could force -rpath if 
needed - add those options to LDFLAGS ( see ./configure --help) .


Regards,
Roumen Petrov