Re: pgxs question - linking c-functions to external libraries

I recently had need to do the same thing and I am having no luck. Admittedly, I am not too keen on the postgres build setup and have not debugged this extensively, but rather hoped there was an easy answer up front. That said….

I am trying to link libuuid into a custom extension, here is my make file (building PG 9.3.5 on CentOS 6.5 (GCC 4.4.7) fwiw):

MODULES = aitpowerpg
EXTENSION = aitpowerpg
DATA = aitpowerpg--1.0.sql

SHLIB_LINK += -luuid

ifdef USE_PGXS
PG_CONFIG = pg_config
PGXS := $(shell $(PG_CONFIG) --pgxs)
include $(PGXS)
else
subdir = contrib/aitpowerpg
top_builddir = ../..
include $(top_builddir)/src/Makefile.global
include $(top_srcdir)/contrib/contrib-global.mk
endif

The line SHLIB_LINK += -luuid has no effect. All of postgres builds & runs ok, this custom module builds fine but won’t load due to missing symbols which makes sense since ldd shows that libuuid is not linked in.

If I make clean, make, then just execute the last gcc invocation to link the extension then manually tack -luuid at the end, all is good.

Is there something simple I’m missing?

thanks
alan

> On Jun 19, 2013, at 6:57 AM, Peter Eisentraut <peter_e(at)gmx(dot)net> wrote:
>
> On 6/6/13 11:49 PM, Rad Cirskis wrote:
>> Hi John,
>> have you managed to get it to link with external shared libs?
>
> Sure, many extensions to that. Do something like
>
> SHLIB_LINK += -lfoo
>
> in your Makefile.
>
>
>
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