On Mon, Sep 18, 2000 at 09:35:32AM -0400, Barry A. Warsaw wrote:
>
> >>>>> "TM" == Trent Mick <trentm@ActiveState.com> writes:
>
> TM> Duh, learning about LD_LIBRARY_PATH (set LD_LIBRARY_PATH to
> TM> /usr/local/lib) and everything is hunky dory. I presumed that
> TM> /usr/local/lib would be on the default search path for shared
> TM> libraries. Bad assumption I guess.
>
> Also, look at the -R flag to ld. In my experience (primarily on
> Solaris), any time you compiled with a -L flag you absolutely /had/ to
> include a similar -R flag, otherwise you'd force all your users to set
> LD_LIBRARY_PATH.
>
Thanks, Barry. Reading about -R led me to -rpath, which works for me. Here is
the algorithm from the info docs:
`-rpath-link DIR'
When using ELF or SunOS, one shared library may require another.
This happens when an `ld -shared' link includes a shared library
as one of the input files.
When the linker encounters such a dependency when doing a
non-shared, non-relocateable link, it will automatically try to
locate the required shared library and include it in the link, if
it is not included explicitly. In such a case, the `-rpath-link'
option specifies the first set of directories to search. The
`-rpath-link' option may specify a sequence of directory names
either by specifying a list of names separated by colons, or by
appearing multiple times.
The linker uses the following search paths to locate required
shared libraries.
1. Any directories specified by `-rpath-link' options.
2. Any directories specified by `-rpath' options. The difference
between `-rpath' and `-rpath-link' is that directories
specified by `-rpath' options are included in the executable
and used at runtime, whereas the `-rpath-link' option is only
effective at link time.
3. On an ELF system, if the `-rpath' and `rpath-link' options
were not used, search the contents of the environment variable
`LD_RUN_PATH'.
4. On SunOS, if the `-rpath' option was not used, search any
directories specified using `-L' options.
5. For a native linker, the contents of the environment variable
`LD_LIBRARY_PATH'.
6. The default directories, normally `/lib' and `/usr/lib'.
For the native ELF linker, as the last resort, the contents of
/etc/ld.so.conf is used to build the set of directories to search.
If the required shared library is not found, the linker will issue
a warning and continue with the link.
Trent
--
Trent Mick
TrentM@ActiveState.com
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