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noreturn is a function attribute to inform the compiler that this function will never return. The compiler can then optimize and make better code. More important, it helps avoiding spurious warnings of uninitialized variables.

  • Do not assume that registers saved by the calling function are restored before calling the noreturn-function.
  • A noreturn-function should have a return type of void.
  • This attribute got implemented with the C251 version 5.51.


void foo()  __attribute__  ((noreturn));

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