m4/ax_check_opencl.m4

   1 # Check if OpenCL is available and that it supports a CPU device.
   2 # The check for a CPU device is the same check that is performed
   3 # by opencl_create_device in ocl_utilities.c
   4 AC_DEFUN([AX_CHECK_OPENCL], [
   5         AC_SUBST(HAVE_OPENCL)
   6         HAVE_OPENCL=no
   7         AC_CHECK_HEADER([CL/opencl.h], [
   8                 AC_CHECK_LIB([OpenCL], [clGetPlatformIDs], [
   9                         SAVE_LIBS=$LIBS
  10                         LIBS="$LIBS -lOpenCL"
  11                         AC_MSG_CHECKING([for OpenCL CPU device])
  12                         AC_RUN_IFELSE([AC_LANG_PROGRAM(
  13                                 [[#include <CL/opencl.h>]], [[
  14         cl_platform_id platform;
  15         cl_device_id dev;
  16
  17         if (clGetPlatformIDs(1, &platform, NULL) < 0)
  18                 return 1;
  19         if (clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, 1, &dev, NULL) < 0)
  20                 return 1;
  21                                 ]])], [HAVE_OPENCL=yes])
  22                         AC_MSG_RESULT($HAVE_OPENCL)
  23                         LIBS=$SAVE_LIBS
  24                         ])])
  25 ])