Le 26/05/2021 à 21:02, Michael Forney a écrit :
> This check is to ensure that the loop in signal_table_init() from
> SIGRTMIN to SIGRTMAX falls within the bounds of host_to_target_signal_table
> (_NSIG). However, it is not critical, since _NSIG is already defined
> to be the one larger than the largest signal supported by the system
> (as specified in the upcoming POSIX revision[0]).
>
> musl libc does not define __SIGRTMAX, so disabling this check when
> it is missing fixes one of the last remaining errors when building
> qemu.
>
> [0] https://www.austingroupbugs.net/view.php?id=741
>
> Signed-off-by: Michael Forney <mforney@mforney.org>
> ---
> Changes since v2:
> * Guard check by #ifdef __SIGRTMAX instead of removing it.
>
> linux-user/signal.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/linux-user/signal.c b/linux-user/signal.c
> index 9016896dcd..0f19c59dee 100644
> --- a/linux-user/signal.c
> +++ b/linux-user/signal.c
> @@ -38,7 +38,9 @@ static void host_signal_handler(int host_signum, siginfo_t *info,
> * Signal number 0 is reserved for use as kill(pid, 0), to test whether
> * a process exists without sending it a signal.
> */
> +#ifdef __SIGRTMAX
> QEMU_BUILD_BUG_ON(__SIGRTMAX + 1 != _NSIG);
> +#endif
> static uint8_t host_to_target_signal_table[_NSIG] = {
> [SIGHUP] = TARGET_SIGHUP,
> [SIGINT] = TARGET_SIGINT,
>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>