安裝 OpenCL 程式框架 (一)：pocl (修訂)

前文〝安裝 OpenCL 程式框架 (五)：AMD CPU〞的安裝步驟因 AMD 未再更新其 CPU 的 OpenCL 程式框架，恐影響 OpenCL 之效能，故擬採用 pocl 的 OpenCL 程式框架。參考〝安裝 OpenCL 程式框架 (一)：pocl〞安裝完成後，開始測試，

[SiB@A10-R7 ~]$ ./Hello_All_OpenCL
There are 2 platforms in this system.
1.Clover, OpenCL 1.1 Mesa 17.3.6, 1 device.
  1-1.[GPU] AMD KAVERI (DRM 2.50.0 / 4.15.9-300.fc27.x86_64, LLVM 5.0.1), 17.3.6, 8 Compute Units, 866 MHz.
            OpenCL 1.1 Mesa 17.3.6, OpenCL C 1.1 (1.1), 64-bit Little-Endian.
            Computed '1000000/1000000' correct values!  (  0.306309 us)
2.Portable Computing Language, OpenCL 1.2 pocl 0.15-pre, LLVM 5.0.0, 1 device.
  2-1.[CPU] pthread-AMD A10-7890K Radeon R7, 12 Compute Cores 4C+8G, 0.15-pre, 4 Compute Units, 4100 MHz.
            OpenCL 1.2 pocl HSTR: pthread-x86_64-unknown-linux-gnu-haswell, OpenCL C 1.2 pocl(1.2), 64-bit Little-Endian.
1 error generated.
Error: Failed to build program executable! (-11)
error: <built-in>:2:10: '/usr/lib64/clang/5.0.0/include/opencl-c.h' file not found