Undefined symbol

On Tue, Mar 06, 2001 at 06:44:31PM -0500, Boulat Khakimov allegedly wrote:

testdb=# select encode('bob','bob');
ERROR: Load of file /home/boulat/Funio.com/database/encode.so failed:
/home/boulat/Funio.com/database/encode.so: undefined symbol:
BF_cfb64_encrypt

thats the function that I call from inside my c code...
but Why??? It compiled with no errors or warning, and I have all the
right includes in my source code.

Im confused!

Are you linking against a blowfish library? If so, either include the
encryption functions in your shared object, or load that shared object
yourself. Have a look at the dlopen manpage for more information.

I hope this helps a bit,

Mathijs
--
It's not that perl programmers are idiots, it's that the language
rewards idiotic behavior in a way that no other language or tool has
ever done.
Erik Naggum

On Tue, Mar 06, 2001 at 06:44:31PM -0500, Boulat Khakimov wrote:

Hi,

Im writing a function in C (encode) for PG that uses blowfish encryption
here is how I compile it.

gcc -I/usr/src/postgresql-7.0.3/src/include
-I/usr/src/postgresql-7.0.3/src/backend -O2 -Wall -Wmissing-prototypes
-Wmissing-declarations -lcrypt
-I/usr/src/postgresql-7.0.3/src/interfaces/libpq
-I/usr/src/postgresql-7.0.3/src/include -fpic
-I/home/boulat/Funio.com/database/libblowfish.a -c -o encode.o
encode.c

I suspect you want
...
-L/usr/src/postgresql-7.0.3/src/interfaces/
/home/boulat/Funio.com/database/libblowfish.a -c -o encode -lpq

But I wonder if, libblowfish.a is compiled with position independent
code *and* if libpq is reachable by the backend database. I don't think
your libblowfish is getting linked into the object.

it compiles nicely with 0 error or warnings,

then i do
gcc -shared -o encode.so encode.o
rm encode.o

so now im left we a ready to go encode.so , So now I add that function
to DB

testdb=# CREATE FUNCTION encode(text,text)
testdb-# RETURNS text
testdb-# AS '/home/boulat/Funio.com/database/encode.so'
testdb-# LANGUAGE 'C';
CREATE

no problems there either, BUT ...

testdb=# select encode('bob','bob');
ERROR: Load of file /home/boulat/Funio.com/database/encode.so failed:
/home/boulat/Funio.com/database/encode.so: undefined symbol:
BF_cfb64_encrypt

thats the function that I call from inside my c code...
but Why??? It compiled with no errors or warning, and I have all the
right includes in my source code.

Im confused!

Any help would be appreciated.

Regards,
Boulat Khakimov

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--
Eric G. Miller <egm2@jps.net>

"Eric G. Miller" wrote:

I suspect you want
...
-L/usr/src/postgresql-7.0.3/src/interfaces/
/home/boulat/Funio.com/database/libblowfish.a -c -o encode -lpq

But I wonder if, libblowfish.a is compiled with position independent
code *and* if libpq is reachable by the backend database. I don't think
your libblowfish is getting linked into the object.

libblofish.a wasnt getting linked to encode.so , I fixed that
now it works w/o a glitch! :)

two way encoding in Postgres using blowfish!!!

If anyone is interested im goin to put a source code on a webpage or
something

Life is good again :P

Regards,
Boulat Khakimov

--- Boulat Khakimov <boulat@inet-interactif.com> wrote:

"Eric G. Miller" wrote:

I suspect you want
...
-L/usr/src/postgresql-7.0.3/src/interfaces/
/home/boulat/Funio.com/database/libblowfish.a -c -o

encode -lpq

But I wonder if, libblowfish.a is compiled with position

independent

code *and* if libpq is reachable by the backend database. I

don't think

your libblowfish is getting linked into the object.

libblofish.a wasnt getting linked to encode.so , I fixed that
now it works w/o a glitch! :)

two way encoding in Postgres using blowfish!!!

If anyone is interested im goin to put a source code on a
webpage or
something

Encrypted authentication is always good :) Please provide the
code. I'm very interested in seeing it. Thanks.

Brent

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