1、Ecplise中, 右键 project -> Properties -> C\C++ Build -> Tool Chain Editor.
Current Builder: 选择 'Gnu make builder' -> Apply (或者 Ok).
问题原因:选择了不支持GCC、G++两种编译器的builder, 'CDT internal builder'
参考:
Build project has encountered a problemm Eclipse C++. - Stack Overflow