unrecognized command line option '-std=c++11'

Question

CodeBlocks keeps giving me this error even though there is no -std=c++11 option enabled (I checked all the settings and the project file).

Is there A way to disable this?

Answer 1

This is my best guess. The compiler you are using to build the project is gcc. You have -std=c++11 set in your global settings for this compiler but the installed version of gcc is too old to recognize the option.

To check this out in the Code::Blocks IDE:

• Navigate Settings -> Compiler

• From the drop-down menu labelled Selected compiler, select the GNU GCC compiler

• On the tab-panel below, select Compiler settings -> Compiler flags

• From the drop-down menu labelled "Categories", select <All categories>.

• Look down the check-box list of compiler options until you see:

Have g++ follow the C++11 ISO C++ language standard [-std=c++11]

• If that check-box is checked then that is probably your problem. Uncheck it, click OK, and then try to rebuild your project.

If that fixes the problem, you should consider upgrading gcc to a version (>= 4.7) that supports the -std=c++11 option as you will then have support for the C++ language and library features of the latest C++ standard.

If you cannot do that, you may find that the -std=c++0x option is acceptable to your compiler. If that works, it will provide support for some provisional version of the C++11 standard that was operative when your compiler was released.

A less likely scenario than the above is that the compiler you are using to build the project is not gcc but some other and non-commandline-compatible compiler than you have set up in Code::Blocks by copying GCC's global configuration, in which the -std-c++11 option is set. In that case you just have to ensure that no global options are configured for this compiler that it does not recognize.

For your future reference, if you have a problem with the commandline options of a c++ compiler, say what compiler it is, and what version.