patch 8.1.0312: wrong type for flags used in signal handlers
Problem: Wrong type for flags used in signal handlers.
Solution: Use sig_atomic_t. (Dominique Pelle, closes #3356)
diff --git a/src/os_unix.c b/src/os_unix.c
index 80c6175..080f03c 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -161,7 +161,7 @@
static int get_x11_icon(int);
static char_u *oldtitle = NULL;
-static volatile int oldtitle_outdated = FALSE;
+static volatile sig_atomic_t oldtitle_outdated = FALSE;
static int did_set_title = FALSE;
static char_u *oldicon = NULL;
static int did_set_icon = FALSE;
@@ -205,7 +205,7 @@
# define SET_SIG_ALARM
static RETSIGTYPE sig_alarm SIGPROTOARG;
/* volatile because it is used in signal handler sig_alarm(). */
-static volatile int sig_alarm_called;
+static volatile sig_atomic_t sig_alarm_called;
#endif
static RETSIGTYPE deathtrap SIGPROTOARG;
@@ -231,13 +231,13 @@
#endif
/* volatile because it is used in signal handler sig_winch(). */
-static volatile int do_resize = FALSE;
+static volatile sig_atomic_t do_resize = FALSE;
static char_u *extra_shell_arg = NULL;
static int show_shell_mess = TRUE;
/* volatile because it is used in signal handler deathtrap(). */
-static volatile int deadly_signal = 0; /* The signal we caught */
+static volatile sig_atomic_t deadly_signal = 0; /* The signal we caught */
/* volatile because it is used in signal handler deathtrap(). */
-static volatile int in_mch_delay = FALSE; /* sleeping in mch_delay() */
+static volatile sig_atomic_t in_mch_delay = FALSE; /* sleeping in mch_delay() */
#if defined(FEAT_JOB_CHANNEL) && !defined(USE_SYSTEM)
static int dont_check_job_ended = 0;
@@ -1247,7 +1247,7 @@
#if defined(SIGCONT)
static RETSIGTYPE sigcont_handler SIGPROTOARG;
-static volatile int in_mch_suspend = FALSE;
+static volatile sig_atomic_t in_mch_suspend = FALSE;
/*
* With multi-threading, suspending might not work immediately. Catch the
@@ -1260,7 +1260,7 @@
*
* volatile because it is used in signal handler sigcont_handler().
*/
-static volatile int sigcont_received;
+static volatile sig_atomic_t sigcont_received;
static RETSIGTYPE sigcont_handler SIGPROTOARG;
/*