st 11. 2. 2026 v 12:03 odesÃlatel Wander Lairson Costa <[email protected]> napsal: > > `#pragma once` in timerlat_u.h is needed for pre-C23 compilers to avoid > > redefinition errors. > > Isn't it necessary for C23 compilers? >
C23 allowed struct redefinition [1] to enable template-like macros. As a side effect, including timerlat_u.h twice does not break anything, in C23 only. But the Linux kernel supports building with lower standards of C, so it has to work there, too. Tomas [1] https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3003.pdf
