Also, added the missing include guard to perf_precomp.hpp.
This should fix the build.

fix the compilation bug of main.cpp in perf test and accuracy test on ocl module. It caused by the incompatibility of command line parser class in core.hpp between master branch and 2.4 branch.

remove as much warnings as possible
use enum instead of MACRO for ocl.hpp
add command line parser in accuracy test and perf test
some bug fix for arthim functions

change the download channels to oclchannles()
fix bugs of arithm functions
perf fix of bilateral
bug fix of split test case
add build_warps functions

add OCL 1.2 feature for setTo
bug fix of integral
replace the error code -217 with suitable MACRO
simplify tests, no need apply a new context for each test case
add more control for tests in utility.hpp