GCC #pragma to stop compilation

Question

Is there a GCC pragma directive that will stop,halt, or abort the compilation process?

I am using gcc 4.1 but would want the pragma to be available on gcc 3.x versions also.

Answer 1

I do not know about a #pragma, but #error should do what you want:

#error Failing compilation

Will terminate compilation with the error message "Failing compilation"

Answer 2

You probably want #error:

edd@ron:/tmp$ g++ -Wall -DGoOn -o stopthis stopthis.cpp
edd@ron:/tmp$ ./stopthis
Hello, world
edd@ron:/tmp$ g++ -Wall -o stopthis stopthis.cpp
stopthis.cpp:7:6: error: #error I had enough
edd@ron:/tmp$ cat stopthis.cpp

#include <iostream>

int main(void) {
  std::cout << "Hello, world\n";
  #ifndef GoOn
    #error I had enough
  #endif
  return 0;
}
edd@ron:/tmp$