向Makefile添加C ++ 11支持

我正在尝试在Ubuntu上使用make命令来构建库，但我收到此错误消息：

In file included from /usr/include/c++/4.7/cstdint:35:0,
                 from /home/mohammad/face-analysis-sdk-stable/src/utils/helpers.hpp:26,
                 from /home/mohammad/face-analysis-sdk-stable/src/utils/command-line-arguments.cpp:21:
/usr/include/c++/4.7/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.
make[2]: *** [src/utils/CMakeFiles/utilities.dir/command-line-arguments.cpp.o] Error 1
make[1]: *** [src/utils/CMakeFiles/utilities.dir/all] Error 2
make: *** [all] Error 2

我知道我需要在某个地方添加C ++ 11标志，但是我以前从未使用过make文件，我浏览了make文件，但找不到应该在哪里添加它。我找不到g ++或编译标志或其他任何内容。

以下是make文件的一部分，请您指出我应该编辑的小麦吗？

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