关于make提示must be enabled with the -std=c++11 or -std=gnu++11 compiler options
2016-12-02 19:03
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在make后，出现错误，提示如下：
原因是写的CMakeLists.txt文件没有添加对C++11的支持，所以在工程目录下的CMakeLists.txt中添加以下语句：
然后编译即可通过。
其中，参数CMAKE_CXX_FLAGS含义是： set compiler for c++ language
而后面的-O3（是字母opq的o，大写的欧）是用来调节编译时的优化程度的，最高为-O3,最低为-O0（即不做优化）
-Ox这个参数只有在CMake -DCMAKE_BUILD_TYPE=Release时有效，因为debug 版的项目生成的可执行文件需要有调试信息并且不需要进行优化,而 release 版的不需要调试信息但需要优化
/usr/include/c++/4.8/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options. #error This file requires compiler and library support for the \ ^
原因是写的CMakeLists.txt文件没有添加对C++11的支持，所以在工程目录下的CMakeLists.txt中添加以下语句：
SET( CMAKE_CXX_FLAGS "-std=c++11 -O3")
然后编译即可通过。
其中，参数CMAKE_CXX_FLAGS含义是： set compiler for c++ language
而后面的-O3（是字母opq的o，大写的欧）是用来调节编译时的优化程度的，最高为-O3,最低为-O0（即不做优化）
-Ox这个参数只有在CMake -DCMAKE_BUILD_TYPE=Release时有效，因为debug 版的项目生成的可执行文件需要有调试信息并且不需要进行优化,而 release 版的不需要调试信息但需要优化
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