I've read that there is some compiler optimization when using
#pragma once which can result in faster compilation. I recognize that is non-standard, and thus could pose a cross-platform compatibility issue.
Is this something that is supported by most modern compilers on non-windows platforms (gcc)?
I want to avoid platform compilation issues, but also want to avoid the extra work of fallback guards:
#pragma once #ifndef HEADER_H #define HEADER_H ... #endif // HEADER_H
Should I be concerned? Should I expend any further mental energy on this?