Tom Lane wrote:
> Ugh. So given that linker behavior, it's basically impossible to
> support multiple libpq versions in the same directory anyway on AIX.
It is possible, if you have both versions of the shared object in
the same library. Essentially what I proposed for 3b).
It is the way IBM does it with their system libraries.
I set up a sample with libpq version 4 and version 5 in libpq.a:
$ dump -ov /postgres/8.2/lib/libpq.a
/postgres/8.2/lib/libpq.a[libpq.so.4]:
***Object Module Header***
[...]
Flags=( EXEC DYNLOAD SHROBJ LOADONLY DEP_SYSTEM )
[...]
/postgres/8.2/lib/libpq.a[libpq.so.5]:
***Object Module Header***
[...]
Flags=( EXEC DYNLOAD SHROBJ DEP_SYSTEM )
[...]
The linker will only link against the shared object that does
not have the LOADONLY flag set, but stuff linked against
libpq.a(libpq.so.4) will continue to work.
> I concur with your 3a) then. Do you have time to do that now?
I'll start right away.
Yours,
Laurenz Albe
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