From: Lonnie Cumberland <lonnie_cumberland@yahoo.com>
To: Peter Eisentraut <peter_e@gmx.net>
Cc: pgsql-interfaces@postgresql.org
Subject: g++ not working for postgresql extension languages?
Date: Sat, 14 Apr 2001 17:46:15 -0700 (PDT)
Message-ID: <20010415004615.35217.qmail@web12508.mail.yahoo.com> (raw)
In-Reply-To: <Pine.LNX.4.30.0104150020360.761-100000@peter.localdomain>
Hi All again,
One more thing that I have tried.
If I now do a similar thing as in my previous message with the "funcs.c" file,
but this time with the "funcs.cc" file then I can get:
-------------------------------------------------------------------------
[root@Treazurac /test]# g++ -I./include -I./backend -O2 -Wall
-Wmissing-prototypes -Wmissing-declarations -I/usr/include/pgsql -I/usr/include
-fpic -c -o funcs.o funcs.cc
[root@Treazurac /test]# g++ -shared -o funcs.so funcs.o
[root@Treazurac /test]# ls
Makefile Makefile.global Makefile.port funcs.cc funcs.o funcs.so*
funcs.sql
[root@Treazurac /test]# pico -w funcs.sql
[root@Treazurac /test]# psql -f funcs.sql -d trdata
DROP
CREATE
[root@Treazurac /test]# psql trdata
Welcome to psql, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit
trdata=# select concat_text('a','b');
ERROR: Can't find function concat_text in file /test/funcs.so
trdata=#
--------------------------------------------------------------------------
And although I should not be running as "root", this is a test machine and it
is ok for the time being.
If I do the same thing as above, but using the "funcs.c" file (which is the
exact same file just renamed)
---------------------------------------------------------------------------
funcs.c and funcs.cc
-------------------------
#include "postgres.h" // for variable length type
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h> // for unix crypt function
text *
concat_text(text *arg1, text *arg2);
text *
concat_text(text *arg1, text *arg2)
{
int32 new_text_size = VARSIZE(arg1) + VARSIZE(arg2) - VARHDRSZ;
text *new_text = (text *) malloc(new_text_size);
memset((void *) new_text, 0, new_text_size);
VARSIZE(new_text) = new_text_size;
strncpy(VARDATA(new_text), VARDATA(arg1), VARSIZE(arg1)-VARHDRSZ);
strncat(VARDATA(new_text), VARDATA(arg2), VARSIZE(arg2)-VARHDRSZ);
return (new_text);
}
--------------------------------------------------------------------------
with funcs.sql
------------------
DROP FUNCTION concat_text(text, text);
CREATE FUNCTION concat_text(text, text) RETURNS text
AS '/test/funcs.so' LANGUAGE 'c';
----------------------------------------------------------------------------
With the "funcs.c" file in place I get:
-----------------------------------------------------------------------------
[root@Treazurac /test]# gcc -I./include -I./backend -O2 -Wall
-Wmissing-prototypes -Wmissing-declarations -I/usr/include/pgsql -I/usr/include
-fpic -c -o funcs.o funcs.c
[root@Treazurac /test]# gcc -shared -o funcs.so funcs.o
[root@Treazurac /test]# psql -f funcs.sql -d trdata
DROP
CREATE
[root@Treazurac /test]# psql trdata
Welcome to psql, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit
trdata=# select concat_text('a','b');
concat_text
-------------
ab
(1 row)
trdata=#
-----------------------------------------------------------------------------
so now I do not understand why the "gcc" version works and the "g++" version
does not?
Just a side note in that I can easliy compile c++ the examples in the
interfaces/libpq++ directory without any problems so that this is very strange
to me.
I really need the "g++" version to work correctly as well?
Any ideas anyone?
Cheers
Lonnie
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To: pgsql-interfaces@postgresql.org
Cc: lonnie_cumberland@yahoo.com, peter_e@gmx.net
Subject: Re: g++ not working for postgresql extension languages?
In-Reply-To: <20010415004615.35217.qmail@web12508.mail.yahoo.com>
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