1，
CMake Error at CMakeLists.txt:44 (project): No CMAKE_C_COMPILER could be found. CMake Error at CMakeLists.txt:44 (project): No CMAKE_CXX_COMPILER could be found. B000000045613:liuhanwork liuhan01$ xcrun -find c++ /Library/Developer/CommandLineTools/usr/bin/c++ B000000045613:liuhanwork liuhan01$ xcrun -find cc /Library/Developer/CommandLineTools/usr/bin/cc
2，自己重装了xcode,修改原来默认路径
xcode-select: error: tool ‘xcodebuild‘ requires Xcode, but active developer directory ‘/Library/Developer/CommandLineTools‘ is a command line tools instance
B000000045613:Developer liuhan01$ ls
Applications Makefiles Toolchains usr
Library Platforms Tools
B000000045613:Developer liuhan01$ pwd
/Applications/Xcode.app/Contents/Developer
B000000045613:bin liuhan01$ xcode-select -p /Library/Developer/CommandLineTools B000000045613:Applications liuhan01$ sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer Password: B000000045613:Applications liuhan01$ B000000045613:Applications liuhan01$ xcode-select -p /Applications/Xcode.app/Contents/Developer
原文：http://www.cnblogs.com/liuhan333/p/7233653.html