Why Does My C Multithreaded Program Throw an \'Operation Not Permitted\' Error Despite Using \'-pthread\'?

Compiling Multithreaded Code with g : Troubleshooting Runtime Errors

Problem:

Despite using the recommended '-pthread' flag, you encounter a runtime error when attempting to compile and execute a multithreaded C program with g . The error message indicates "Operation not permitted" when attempting to use the 'std::thread' object.

Possible Solution:

The issue may be due to a bug in the g compiler. To resolve this, apply the following workaround:

Append the '-Wl,--no-as-needed' flag to the compilation command. This flag instructs the linker to not consider the symbol 'pthreads' as needed for the program.

Revised Compilation Command:

g++ main.cpp -o main.out -pthread -std=c++11 -Wl,--no-as-needed

This workaround should allow you to compile and execute your multithreaded code successfully.

Note:

This issue has been reported on the official g bug tracker, and a fix is expected in the future. However, the workaround provided here should resolve the problem for now.

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