编译opencv-2.4.12版本记录

1、 math cannot parse the expression: "*100 + ": syntax error, unexpected   exp_TIMES, expecting exp_PLU

　change "dumpversion" to "dumpfullversion"

2、the compiler can assume that the address of 'annotate_img' will never be NULL [-Werror=address]

　delete "-Werror=address" in flag.cmake