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Re:Notes on Programming in C (1989) by tbirdz on Sunday May 11, 2014 @10:23AM (#7728764)
There is #pragma once

It's not standard, but it is supported by many compilers.

Re:Notes on Programming in C (1989) by ahy1 on Sunday May 11, 2014 @12:07PM (#7728996)
I wish for a standard #once directive. It should be very simple to implement, increase preprocessing speed and reduce the size of visually disturbing boilerplate in header files.
Re:Notes on Programming in C (1989) by octopus on Sunday May 11, 2014 @11:48AM (#7728955)
True, supported by GCC, Clang and Visual Studio and probably other compilers ...