From: Guido Goldstein <guido@gold.siebend.net>
To: pgsql-interfaces@postgresql.org
Cc: Chris Holman <chrish@owl.co.uk>
Subject: Re: [INTERFACES] link problems when inheriting from libpq++
Date: 17 Feb 2000 18:31:55 +0100
Message-ID: <ltu2j7hh10.fsf@nathan.gold.siebend.net> (raw)
References: <000801bf7941$8f9a1c20$2d96a8c0@dylan.owl.co.uk>
Hi!
On Thu, 17 Feb 2000 12:21:47 -0000
"Chris Holman" <chrish@owl.co.uk> wrote:
[...]
> void main(void){
> /*********** why does next line cause problems during
> link?*************/
> newPgCursor causesLinkErrors;
> PgCursor cdh("dbname=testing", "cdh1");
[...]
> CCC=g++
>
> GCCOPTIONS= -frtti -D_CPPRTTI
^^^^^^^
Viewpoint 1
[...]
> ******************** LINKER OUTPUT STARTS **************************
> [chrish@pigpen testString]$ make
> g++ -frtti -D_CPPRTTI -D_UNIT_TEST_OBJECT_ -I/usr/include/pgsql/libpq -I/usr/i
> nclude/pgsql/libpq++ -I/usr/include/pgsql -c test.cpp -o test.o
> g++ -o test.exe test.o -L/usr/lib -lpq++ -lpq
> test.o: In function `newPgCursor type_info function':
> test.o(.gnu.linkonce.t.__tf11newPgCursor+0xd): undefined reference to `PgCursor
> type_info function'
Read the error message!
You're compiling your program with RTTI (runtime-type-information)
enabled (see Viepoint 1). Before you can use other C++-Libs you have
to make sure that these libs also include the RTTI code.
HIH
Guido
--
The biggest improvement in performance is the non-working-to-working
transition. -- John Ousterhout
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To: pgsql-interfaces@postgresql.org
Cc: guido@gold.siebend.net, chrish@owl.co.uk
Subject: Re: [INTERFACES] link problems when inheriting from libpq++
In-Reply-To: <ltu2j7hh10.fsf@nathan.gold.siebend.net>
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