> Date: Sun, 5 Jan 2025 16:19:50 +0100 > From: Anders Magnusson <ra...@tethuvudet.se> > > Den 2025-01-05 kl. 15:48, skrev Taylor R Campbell: > > Any objections to compiling the kernel with -std=gnu11 instead? > What are the reasons why we cannot use -std=c11 instead in that case?
Good question! I just tried building aarch64 and i386 GENERIC kernels with -std=c11 and the only issue that came up was the use of the nonstandard keywords asm and typeof. Compiling with -std=c11 -Dasm=__asm -Dtypeof=__typeof worked fine. I skimmed through https://gcc.gnu.org/onlinedocs/gcc-10.5.0/gcc/C-Extensions.html for other things whose semantics might change with -std=gnu11 vs -std=c11, and the only case I came up with was the `\e' escape in strings, of which we have one use: sys/fs/udf/udf_osta.c:238: printf("checksum: calculated=%4.4x, correct=%4.4x\en", x, 0x3299); This looks like it might be a mistake anyway. So maybe we can get by with -std=c11 and some judiciously placed #define asm __asm and similar without any effort beyond that.
