driver in globus toolkit - c

Question

I have been trying to run an example driver program given in the globus toolkit website. This is the program:
#include "globus_xio.h"
int main(int argc,char *argv[])
{
globus_result_t res;
char * driver_name;
globus_xio_driver_t driver;
globus_xio_stack_t stack;
globus_xio_handle_t handle;
globus_size_t nbytes;
char * contact_string = NULL;
char buf[256];
contact_string = argv[1];
driver_name = argv[2];
globus_module_activate(GLOBUS_XIO_MODULE);
res = globus_xio_driver_load(driver_name,&driver);
assert(res == GLOBUS_SUCCESS);
res = globus_xio_stack_init(&stack, NULL);
assert(res == GLOBUS_SUCCESS);
res = globus_xio_stack_push_driver(stack, driver);
assert(res == GLOBUS_SUCCESS);
res = globus_xio_handle_create(&handle, stack);
assert(res == GLOBUS_SUCCESS);
res = globus_xio_open(handle, contact_string, NULL);
assert(res == GLOBUS_SUCCESS);
do
{
res = globus_xio_read(handle, buf, sizeof(buf) - 1, 1, &nbytes, NULL);
if(nbytes > 0)
{
buf[nbytes] = '\0';
fprintf(stderr, "%s", buf);
}
} while(res == GLOBUS_SUCCESS);
globus_xio_close(handle, NULL);
globus_module_deactivate(GLOBUS_XIO_MODULE);
return 0;
}
When I compile this using the command
cc -I /usr/include/globus globus_xio_example.c
I get the following errors
/tmp/ccLMLlIi.o: In function `main':
globus_xio_example.c:(.text+0x57): undefined reference to `globus_i_xio_module'
globus_xio_example.c:(.text+0x5c): undefined reference to `globus_module_activate'
globus_xio_example.c:(.text+0x75): undefined reference to `globus_xio_driver_load'
globus_xio_example.c:(.text+0xb1): undefined reference to `globus_xio_stack_init'
globus_xio_example.c:(.text+0xf2): undefined reference to `globus_xio_stack_push_driver'
globus_xio_example.c:(.text+0x133): undefined reference to `globus_xio_handle_create'
globus_xio_example.c:(.text+0x179): undefined reference to `globus_xio_open'
globus_xio_example.c:(.text+0x1d1): undefined reference to `globus_xio_read'
globus_xio_example.c:(.text+0x22b): undefined reference to `globus_xio_close'
globus_xio_example.c:(.text+0x230): undefined reference to `globus_i_xio_module'
globus_xio_example.c:(.text+0x235): undefined reference to `globus_module_deactivate'
collect2: ld returned 1 exit status

Answer 1

It appears that the command used to compile is insufficient:
cc -I /usr/include/globus globus_xio_example.c
Specifically, the linker process indicates that there are a number of symbols that could not be resolved. I suspect that the command used to compile is lacking directives as to which library(s) needs to be linked to resolve the undefined symbols.
HINT:
Use 'globus-makefile-header' to help determine library dependencies.
% globus-makefile-header -flavor=gcc32dbg globus_xio > header
Examine the contents of 'header' for appropriate makefile macros.
Include header in your makefile and use the needed makefile macros.

Answer 2

Try this gcc -I /usr/include/globus globus_xio_example.c -lglobus_xio -lglobus_common