ubuntu下编译小知识点

1 #改变编译器选项
2 SET(CMAKE_C_COMPILER"g++")
3 #出现如下错误：添加C++11特性
4 #error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
5  #error This file requires compiler and library support \
6 #添加如下语句
7 SET( CMAKE_CXX_FLAGS "-std=c++11 -O3")