Embedded Python can't "import socket" -- "undefined symbol"

[Oleg Broytmann]

On 13 Jul 1999, Steven Work wrote:
> I am embedding Python in a C program (on Linux 2.2.x, Debian 2.1), and
> trying to run a script via PyRun_SimpleFile().  "print 'hello, world'"
> works, but "import socket" dies.  Can anyone help me find out why?
> 
> $ ./testfile
> Traceback (innermost last):
>   File "jukebox_xml.py", line 1, in ?
>     import socket
> ImportError: /usr/lib/python1.5/lib-dynload/socketmodule.so: 
> 	undefined symbol: _Py_NoneStruct
> $ nm testfile | grep NoneStruct
> 0808ecfc D _Py_NoneStruct
> 
> And of course "import socket" works fine in /usr/bin/python.  

   _Py_None_Struct (and other symbols) should be exported from your main
program to link successfully. You haven't mention your OS and compiler, but
I think it is ELF-based UNIX, and probably gcc, right?
   Add -Wl,-E to compiler flags. This means "pass -E to ld linker", which
in turn means "export all symbols from main linked module".
   "man ld" for detalils on -E flag.

> -- 
> Steven Work
> Renaissance Labs
> steve at renlabs.com
> 360 647-1833

Oleg.
---- 
    Oleg Broytmann        Netskate/Inter.Net.Ru        phd at emerald.netskate.ru
           Programmers don't die, they just GOSUB without RETURN.