I am just starting (like today) to program in CUDA. So i copied the makefile off one of the SDK examples and renamed some variables to make it make my own file.
The problem is that i cant get the compiler to recognise the built in variable threadIdx. I have a very simple program and i am using the command make emu=1 so that i can have printf statements in there.
Here is my code
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
// includes, project
#include <cufft.h>
#include <cutil.h>
void some(){
int test = threadIdx.x;
printf("%i\n",test);
}
int main(int argc, char** argv)
{
some();
CUT_EXIT(argc, argv);
}
and the compiler error message i get is:
-bash-3.2$ make emu=1
dave1.cu: In function 'void some()':
dave1.cu:13: error: 'threadIdx' was not declared in this scope
make: *** [obj/emurelease/dave1.cu_o] Error 255
-bash-3.2$
What am i doing wrong?