Re: [Starpu-devel] StarPU

[Thilo Kogge <thilo@kogge.net>]

Hello,

I tried to compile source-code of one of your basic examples.

My code is:

#include <starpu.h>

void cpu_func(void *buffers[], void *cl_arg)
{
printf("Hello world\n");
}
struct starpu_codelet cl =
{
.cpu_funcs = { cpu_func, NULL },
.nbuffers = 0
};


int main(int argc, char **argv)
{
/* initialize StarPU */
starpu_init(NULL);
struct starpu_task *task = starpu_task_create();
task->cl = &cl; /* Pointer to the codelet defined above */
/* starpu_task_submit will be a blocking call. If unset,
starpu_task_wait() needs to be called after submitting the task. */
task->synchronous = 1;
/* submit the task to StarPU */
starpu_task_submit(task);
/* terminate StarPU */
starpu_shutdown();
    return 0;
}

I was not able to install the gcc extension on my machine so I tried to compile the code with:
    gcc `pkg-config --cflags libstarpu`  `pkg-config --libs libstarpu` hello_world.c -o hello_world

The output is:

In file included from /home/user/starpu-install/include/starpu/1.1/starpu.h:137:0,
                 from hello_world.c:1:
/home/user/starpu-install/include/starpu/1.1/starpu_deprecated_api.h:27:2: warning: #warning Your application is using deprecated types. You may want to update to use the latest API, by using tools/dev/rename.sh. [-Wcpp]
hello_world.c: In function ‘main’:
hello_world.c:19:12: warning: ignoring return value of ‘starpu_init’, declared with attribute warn_unused_result [-Wunused-result]
hello_world.c:26:19: warning: ignoring return value of ‘starpu_task_submit’, declared with attribute warn_unused_result [-Wunused-result]
/tmp/ccn1qMDi.o: In function `main':
hello_world.c:(.text+0x31): undefined reference to `starpu_init'
hello_world.c:(.text+0x36): undefined reference to `starpu_task_create'
hello_world.c:(.text+0x5f): undefined reference to `starpu_task_submit'
hello_world.c:(.text+0x64): undefined reference to `starpu_shutdown'
collect2: ld returned 1 exit status


And here the pkg config outputs:

user@machine:~/starpu/test$ pkg-config --cflags libstarpu
-DSTARPU_USE_DEPRECATED_API -DSTARPU_USE_DEPRECATED_ONE_ZERO_API -I/home/user/starpu-install/include/starpu/1.1 -I/usr/local/cuda/include -I/home/user/hwloc-install/include -I/usr/include/libxml2
user@machine:~/starpu/test$ pkg-config --libs libstarpu
-L/home/user/starpu-install/lib -L/usr/local/cuda/lib64 -L/home/user/hwloc-install/lib -lstarpu-1.1 -lcudart -lcublas -lcuda -lstdc++ -lOpenCL -lhwloc
.
For now I'm not sure if it's a problem with my starpu installation or my compiler command, or if misunderstood the manual. It looks like if the examples are made for plugin-support.

Thanks for your help

Thilo Kogge