From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | "Brendan LeFebvre" <brendanl(at)iname(dot)com> |
Cc: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: "Undefined functions" pg_dlopen and pg_dlerror when compiling PG7.2.3 under Linux 2.0.? |
Date: | 2002-10-14 18:59:54 |
Message-ID: | 18480.1034621994@sss.pgh.pa.us |
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Lists: | pgsql-novice |
"Brendan LeFebvre" <brendanl(at)iname(dot)com> writes:
> I am trying to build postgres 7.2.3 on the shared box provided by our
> hosting service. The box is running a 2.0.x linux kernel, and the provided
> make is GNU 3.74, gcc is 2.7.2.1.
> Compilation dies thusly:
> utils/SUBSYS.o: In function `load_external_function':
> utils/SUBSYS.o(.text+0x3a79d): undefined reference to `pg_dlopen'
> utils/SUBSYS.o(.text+0x3a7ac): undefined reference to `pg_dlerror'
Hmm. It looks to me like someone messed up the support for dynamic
loading on pre-HAVE_DLOPEN Linuxen. Would you confirm that configure
did not define HAVE_DLOPEN in your src/include/pg_config.h file?
If you want to try to fix it yourself, the files to look at are
src/backend/port/dynloader/linux.h
src/backend/port/dynloader/linux.c
It looks to me like the "#ifdef NOT_USED" in the latter ought to be
"#ifndef HAVE_DLOPEN" instead. But I'm unsure about the linux.h
file; surely it should have extern declarations for the functions
in linux.c?
regards, tom lane
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