pyopencl.RuntimeError: clBuildProgram失败：无效构建选项

Question

我刚接触OpenCL，正在设置一个OpenCL程序，但遇到了一些问题。为了说明我的问题，请看下面的代码（来自https://github.com/benshope/PyOpenCL-Tutorial）：

# Use OpenCL To Add Two Random Arrays (This Way Hides Details)

import pyopencl as cl  # Import the OpenCL GPU computing API
import pyopencl.array as pycl_array  # Import PyOpenCL Array (a Numpy array plus an OpenCL buffer object)
import numpy as np  # Import Numpy number tools

context = cl.create_some_context()  # Initialize the Context
queue = cl.CommandQueue(context)  # Instantiate a Queue

a = pycl_array.to_device(queue, np.random.rand(50000).astype(np.float32))
b = pycl_array.to_device(queue, np.random.rand(50000).astype(np.float32))  
# Create two random pyopencl arrays
c = pycl_array.empty_like(a)  # Create an empty pyopencl destination array

program = cl.Program(context, """
__kernel void sum(__global const float *a, __global const float *b, __global float *c)
{
  int i = get_global_id(0);
  c[i] = a[i] + b[i];
}""").build()  # Create the OpenCL program

program.sum(queue, a.shape, None, a.data, b.data, c.data)  # Enqueue the program for execution and store the result in c

print("a: {}".format(a))
print("b: {}".format(b))
print("c: {}".format(c))  
# Print all three arrays, to show sum() worked

当我运行这个脚本时，出现了以下错误：

"C:\Program Files\WinPython-64bit-2.7.6.3\python-2.7.6.amd64\python.exe" D:/python/openCL/020_array_sum.py
Traceback (most recent call last):
   File "D:/python/openCL/020_array_sum.py", line 20, in <module>
}""").build() # Create the OpenCL program
   File "C:\Program Files\WinPython-64bit-2.7.6.3\python-2.7.6.amd64\lib\site-packages\pyopencl\__init__.py", line 166, in build
options=options, source=self._source)
   File "C:\Program Files\WinPython-64bit-2.7.6.3\python-2.7.6.amd64\lib\site-packages\pyopencl\__init__.py", line 206, in _build_and_catch_errors
     raise err
pyopencl.RuntimeError: clBuildProgram failed: invalid build options - 


(options: -I c:\program files\winpython-64bit-2.7.6.3\python-2.7.6.amd64\lib\site-packages\pyopencl\cl)
(source saved as c:\appdata\local\temp\tmp0bj_ij.cl)

进程以退出代码1结束

根据我的理解，这个问题是由build()函数引起的，但我不明白为什么。在一个论坛上，有人建议用一个"来定义内核，而不是"""。但这也没有解决问题。

我使用的是WinPython-64bit-2.7.6.3和pycharm-community-3.1.1。为了使用OpenCL，我安装了：AMD-APP-SDK-v2.9-Windows-641、Mako-0.9.1.win-amd64-py2.7、pytools-2014.1.2.win-amd64-py2.7和pyopencl-2013.2.win-amd64-py2.7。

我的显卡是Radeon HD 7850，处理器是AMD PhenomII。

附注：当我在Spyder中编译时，错误信息显示：

>>> runfile('D:/python/openCL/020_array_sum.py', wdir=r'D:/python/openCL')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Program Files\WinPython-64bit-2.7.6.3\python-2.7.6.amd64\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 540, in runfile
execfile(filename, namespace)
File "D:/python/openCL/020_array_sum.py", line 20, in <module>
}""").build() # Create the OpenCL program
File "C:\Program Files\WinPython-64bit-2.7.6.3\python-2.7.6.amd64\lib\site-packages\pyopencl\__init__.py", line 166, in build
options=options, source=self._source)
File "C:\Program Files\WinPython-64bit-2.7.6.3\python-2.7.6.amd64\lib\site-packages\pyopencl\__init__.py", line 206, in _build_and_catch_errors
raise err
pyopencl.RuntimeError: clBuildProgram failed: invalid build options - 


(options: -I c:\program files\winpython-64bit-2.7.6.3\python-2.7.6.amd64\lib\site-packages\pyopencl\cl)
(source saved as c:\users\andreas\appdata\local\temp\tmpzrgacv.cl)

编辑：我现在在另一台电脑上也测试过了：同样的错误。那台电脑也有一块Nvidia显卡。两台电脑的共同点是它们都只支持OpenCL 1.1。难道我需要OpenCL 1.2吗？

gpu runtimeerror kernel opencl clbuildprogram amd radeon opencl 1.1

pyopencl.RuntimeError: clBuildProgram失败：无效构建选项

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