[Xsb-development] Calling XSB from C

[K. A. <k_a...@ya...>]

Greetings,

I'm trying to compile and run the examples in c_calling_XSB,
as I need to write a socket-based client that uses XSB. 
I'm mostly interested in cvarstring_thread.c, because I need 
to have multiple querying threads. Unfortunately the code 
in cvarstring_thread.c does not compile - neither on a Linux 
machine nor on Windows (I tried both). In both cases I get 
the following errors:

cvarstring_thread.c: In function 'main':
cvarstring_thread.c:62: warning: implicit declaration of function 'xsb_get_main_thread'
cvarstring_thread.c:67: error: 'th_context' undeclared (first use in this function)
cvarstring_thread.c:67: error: (Each undeclared identifier is reported only once
cvarstring_thread.c:67: error: for each function it appears in.)
cvarstring_thread.c:67: error: 'p_th' undeclared (first use in this function)
cvarstring_thread.c:71: error: too many arguments to function 'xsb_command_string'
cvarstring_thread.c:75: warning: implicit declaration of function 'xsb_ccall_thread_create'
cvarstring_thread.c:75: error: 'r_th' undeclared (first use in this function)
cvarstring_thread.c:77: error: too many arguments to function 'xsb_command_string'

I'm using gcc version 4.4.3, with the right command-line options. 

Could this be due to some sort of configuration error
(e.g., because I didn't explicitly set up XSB to run in 
multi-threaded mode)?

On the other hand, cvarstring.c compiles fine but when I try 
to create an executable I get a warning and, more seriously, 
the following error:

... long path prefix here .../saved.o/xsb.o: In function 'startProfileThread': 
(.text+0x731cd): undefined reference to `pthread_create'
collect2: ld returned 1 exit status 

This is on Linux. (On Windows there doesn't even seem to 
be a file named xsb.* in saved.o.)

Any help will be highly appreciated. Thanks in advance,

Konstantine