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)

src/globals.h

@@ -518,7 +518,7 @@ EXTERN char	*foreground_argument INIT(= NULL);
  *
  * volatile because it is used in signal handler sig_sysmouse().
  */
-EXTERN volatile int hold_gui_events INIT(= 0);
+EXTERN volatile sig_atomic_t hold_gui_events INIT(= 0);
 
 /*
  * When resizing the shell is postponed, remember the new size, and call
@@ -655,7 +655,7 @@ EXTERN int	entered_free_all_mem INIT(= FALSE);
 				/* TRUE when in or after free_all_mem() */
 #endif
 /* volatile because it is used in signal handler deathtrap(). */
-EXTERN volatile int full_screen INIT(= FALSE);
+EXTERN volatile sig_atomic_t full_screen INIT(= FALSE);
 				/* TRUE when doing full-screen output
 				 * otherwise only writing some messages */
 
@@ -800,11 +800,11 @@ EXTERN JMP_BUF x_jump_env;
 EXTERN JMP_BUF lc_jump_env;	/* argument to SETJMP() */
 # ifdef SIGHASARG
 /* volatile because it is used in signal handlers. */
-EXTERN volatile int lc_signal;	/* caught signal number, 0 when no was signal
+EXTERN volatile sig_atomic_t lc_signal;	/* caught signal number, 0 when no was signal
 				   caught; used for mch_libcall() */
 # endif
 /* volatile because it is used in signal handler deathtrap(). */
-EXTERN volatile int lc_active INIT(= FALSE); /* TRUE when lc_jump_env is valid. */
+EXTERN volatile sig_atomic_t lc_active INIT(= FALSE); /* TRUE when lc_jump_env is valid. */
 #endif
 
 #if defined(FEAT_MBYTE) || defined(FEAT_POSTSCRIPT)
@@ -1037,7 +1037,7 @@ EXTERN FILE	*scriptout  INIT(= NULL);   /* stream to write script to */
 EXTERN int	read_cmd_fd INIT(= 0);	    /* fd to read commands from */
 
 /* volatile because it is used in signal handler catch_sigint(). */
-EXTERN volatile int got_int INIT(= FALSE);    /* set to TRUE when interrupt
+EXTERN volatile sig_atomic_t got_int INIT(= FALSE); /* set to TRUE when interrupt
 						signal occurred */
 #ifdef USE_TERM_CONSOLE
 EXTERN int	term_console INIT(= FALSE); /* set to TRUE when console used */

src/os_unix.c

@@ -161,7 +161,7 @@ static int get_x11_title(int);
 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 @@ static RETSIGTYPE catch_sigpwr SIGPROTOARG;
 # 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 @@ static int save_patterns(int num_pat, char_u **pat, int *num_file, char_u ***fil
 #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 @@ after_sigcont(void)
 
 #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 @@ static volatile int in_mch_suspend = FALSE;
  *
  * 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;
 
 /*

src/os_win32.h

@@ -89,6 +89,7 @@
 
 #define FNAME_ILLEGAL "\"*?><|" /* illegal characters in a file name */
 
+#include <signal.h>
 #include <stdlib.h>
 #include <time.h>
 #include <sys/types.h>

src/version.c

@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    312,
 /**/
     311,
 /**/