> cmake .. -- The C compiler identification is unknown -- The CXX compiler identification is unknown-- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- broken CMake Error at /usr/local/Cellar/cmake/3.1.0/share/cmake/Modules/CMakeTestCCompiler.cmake:61 (message): The C compiler "/usr/bin/cc" is not able to compile a simple test program. It fails with the following output: Change Dir: /Users/hoge/project/hoge/image-colorization/build/CMakeFiles/CMakeTmp Run Build Command:"/usr/bin/make" "cmTryCompileExec731088698/fast" Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo. CMake will not be able to correctly generate this project. Call Stack (most recent call first): CMakeLists.txt:3 (project) -- Configuring incomplete, errors occurred! See also "/Users/hoge/project/hoge/image-colorization/build/CMakeFiles/CMakeOutput.log". See also "/Users/hoge/project/hoge/image-colorization/build/CMakeFiles/CMakeError.log". > make Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo.