[Solved] warning: ‘auto’ type specifier is a C++11 extension [-Wc++11-extensions]

Last Updated on 2021-09-18 by Clay

Problem

Today when I was programming on Mac OS, I found some old programs would issue the following warning when compiling:

warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]

In some tasks, even the compilation fails directly. After searching, I found that I couldn’t directly change the settings to make it take effect. I needed to add the -std=c++11 parameter when compiling, so I decided to change the ~/.bash_profile configuration file.

If you used another scripting language, change the corresponding configuration file.

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Solution

Enter the following command in terminal:

echo 'alias g++="g++ -std=c++11"' >> ~/.bash_profile
source ~/.bash_profile

In this way, the -std=c++11 parameter will be included when compiling with g++ in the future. Try to compile and see, the original warning message should disappear.

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References

• https://stackoverflow.com/questions/36962475/warning-auto-type-specifier-is-a-c11-extension-wc11-extensions
• https://stackoverflow.com/questions/39022787/error-non-aggregate-type-vectorint-cannot-be-initialized-with-an-initialize

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Read More

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