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suppress gcc 8 aliasing warnings

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function                                             old     new   delta
sigprocmask_SIG_SETMASK                                -      16     +16
wait_for_child_or_signal                             221     213      -8
dowait                                               432     424      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2018-12-08 13:49:15 +01:00
parent 9f00a0fdb1
commit 136fe9bede
5 changed files with 25 additions and 3 deletions
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12
libbb/lineedit.c
View File

@ -2309,6 +2309,16 @@ static int32_t reverse_i_search(int timeout)
}
#endif
static void sigaction2(int sig, struct sigaction *act)
{
// Grr... gcc 8.1.1:
// "passing argument 3 to restrict-qualified parameter aliases with argument 2"
// dance around that...
struct sigaction *oact FIX_ALIASING;
oact = act;
sigaction(sig, act, oact);
}
/* maxsize must be >= 2.
* Returns:
* -1 on read errors or EOF, or on bare Ctrl-D,
@ -2419,7 +2429,7 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
/* Install window resize handler (NB: after *all* init is complete) */
S.SIGWINCH_handler.sa_handler = win_changed;
S.SIGWINCH_handler.sa_flags = SA_RESTART;
sigaction(SIGWINCH, &S.SIGWINCH_handler, &S.SIGWINCH_handler);
sigaction2(SIGWINCH, &S.SIGWINCH_handler);
#endif
read_key_buffer[0] = 0;
while (1) {

10
libbb/signals.c
View File

@ -31,6 +31,16 @@ int FAST_FUNC sigprocmask_allsigs(int how)
return sigprocmask(how, &set, NULL);
}
int FAST_FUNC sigprocmask_SIG_SETMASK(sigset_t *set)
{
// Grr... gcc 8.1.1:
// "passing argument 3 to restrict-qualified parameter aliases with argument 2"
// dance around that...
sigset_t *oset FIX_ALIASING;
oset = set;
return sigprocmask(SIG_SETMASK, set, oset);
}
void FAST_FUNC bb_signals(int sigs, void (*f)(int))
{
int sig_no = 0;