On 3/11/24 09:48, Michał Kłeczek wrote:
On 11 Mar 2024, at 14:08, Artur Zakirov <zaartur@xxxxxxxxx> wrote:
On Mon, 11 Mar 2024 at 13:26, Michał Kłeczek <michal@xxxxxxxxxxx
<mailto:michal@xxxxxxxxxxx>> wrote:
On 11 Mar 2024, at 11:41, Michał Kłeczek <michal@xxxxxxxxxxx> wrote:
Hi,
I am trying to create an extension that delegates some calls to
btree_gist functions:
DirectFunctionCall5Coll(
gbt_text_consistent, …other arguments);
Basic PGXS Makefile does not work - I get linker error:
Undefined symbols for architecture arm64:
"_gbt_text_consistent", referenced from:
Anyone could provide me with some hints?
I’ve added:
PG_LDFLAGS += -L$(shell $(PG_CONFIG) --pkglibdir) -lbtree_gist
You can try FunctionCall5Coll() or OidFunctionCall5Coll() functions.
OidFunctionCall5Coll() calls fmgr_info() and FunctionCall5Coll(). What
you only need is Oid of the target function.
What I am trying to do is wrapping and decoration of gbt_text_consistent
function.
The reason I want to use DirectFunctionCall5Col is that other variants
require catalog lookup
as I don’t have old of the wrapped function.
The lookup itself is problematic as the only piece of information I have
is the strategy number.
What’s more - the result of the lookup should be cached in fn_extra and
that makes things even more complex.
Is there any way to simply link against another extension library?
I used this successfully in the past with postgis:
postgis_libdir := $(shell pg_config --pkglibdir)
postgis_libver := $(shell ls -1 $(postgis_libdir) | grep "^postgis")
SHLIB_LINK += -L$(postgis_libdir) -l:$(postgis_libver) -llwgeom
HTH,
--
Joe Conway
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com
