macos-opencv-error-fix

....
checking for objdir... .libs
checking for the correct version of gmp.h... yes
checking for the correct version of mpfr.h... yes
checking for the correct version of mpc.h... yes
checking for the correct version of the gmp/mpfr/mpc libraries... yes
checking for compatible ISL... no
configure: error: Unable to find a usable ISL.  See config.log for details.

READ THIS: https://git.io/brew-troubleshooting

These open issues may also help:
freeimage: patches for gcc 5.0 https://github.com/Homebrew/homebrew/pull/44612
gcc can't find compatible ISL https://github.com/Homebrew/homebrew/issues/44444
isl 0.15, cloog 0.18.4, gcc compatibility patch https://github.com/Homebrew/homebrew/pull/44486
gcc causes false alarms in C++ stdlib check https://github.com/Homebrew/homebrew/issues/45218
apple-gcc42 takes priority over modern gcc https://github.com/Homebrew/homebrew/issues/41055
gfortran (from gcc) fails to compile software with error: "suffix or operands invalid for `movq`" https://github.com/Homebrew/homebrew/issues/45258
gcc 4.9.2 fails to produce debugging information https://github.com/Homebrew/homebrew/issues/34976
Object files deleted during build of gcc needed by gdb https://github.com/Homebrew/homebrew/issues/35734
MacOS.(gcc|clang|llvm)_version can return nil https://github.com/Homebrew/homebrew/issues/18781




======>>>> FIX

 $brew install homebrew/versions/gcc49
 $xcode-select --install
 $brew install opencv
 
 $sudo ln /usr/local/Cellar/opencv/2.4.12/lib/python2.7/site-packages/cv.py /Library/Python/2.7/site-packages/cv.py
 $sudo ln /usr/local/Cellar/opencv/2.4.12/lib/python2.7/site-packages/cv2.so /Library/Python/2.7/site-packages/cv2.so