dmesg.c:42: error: expected declaration specifiers or ‘...’ before ‘klogctl’
dmesg.c:42: error: expected declaration specifiers or ‘...’ before ‘type’
dmesg.c:42: error: expected declaration specifiers or ‘...’ before ‘b’
dmesg.c:42: error: expected declaration specifiers or ‘...’ before ‘len’
without belows compat section dmesg just compiles fine against klibc.
as bonus reorder the includes.