patch 8.1.0371: argument types for select() may be wrong

Problem:    Argument types for select() may be wrong.
Solution:   Use a configure macro. (Tobias Ulmer)

src/auto/configure

@@ -12630,6 +12630,81 @@ _ACEOF
 fi
 done
 
+for ac_header in sys/select.h sys/socket.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking types of arguments for select" >&5
+$as_echo_n "checking types of arguments for select... " >&6; }
+if ${ac_cv_func_select_args+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  for ac_arg234 in 'fd_set *' 'int *' 'void *'; do
+ for ac_arg1 in 'int' 'size_t' 'unsigned long int' 'unsigned int'; do
+  for ac_arg5 in 'struct timeval *' 'const struct timeval *'; do
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+
+int
+main ()
+{
+extern int select ($ac_arg1,
+					    $ac_arg234, $ac_arg234, $ac_arg234,
+					    $ac_arg5);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_func_select_args="$ac_arg1,$ac_arg234,$ac_arg5"; break 3
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  done
+ done
+done
+# Provide a safe default value.
+: "${ac_cv_func_select_args=int,int *,struct timeval *}"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_select_args" >&5
+$as_echo "$ac_cv_func_select_args" >&6; }
+ac_save_IFS=$IFS; IFS=','
+set dummy `echo "$ac_cv_func_select_args" | sed 's/\*/\*/g'`
+IFS=$ac_save_IFS
+shift
+
+cat >>confdefs.h <<_ACEOF
+#define SELECT_TYPE_ARG1 $1
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define SELECT_TYPE_ARG234 ($2)
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define SELECT_TYPE_ARG5 ($3)
+_ACEOF
+
+rm -f conftest*
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _LARGEFILE_SOURCE value needed for large files" >&5
 $as_echo_n "checking for _LARGEFILE_SOURCE value needed for large files... " >&6; }
 if ${ac_cv_sys_largefile_source+:} false; then :

src/config.h.in

@@ -113,6 +113,9 @@
 /* Define if you can safely include both <sys/time.h> and <sys/select.h>.  */
 #undef SYS_SELECT_WITH_SYS_TIME
 
+/* Define to a typecast for select() arguments 2, 3 and 4. */
+#undef SELECT_TYPE_ARG234
+
 /* Define if you have /dev/ptc */
 #undef HAVE_DEV_PTC
 

src/configure.ac

@@ -3721,6 +3721,7 @@ AC_CHECK_FUNCS(fchdir fchown fchmod fsync getcwd getpseudotty \
 	sigprocmask sigvec strcasecmp strerror strftime stricmp strncasecmp \
 	strnicmp strpbrk strtol tgetent towlower towupper iswupper \
 	usleep utime utimes mblen ftruncate unsetenv)
+AC_FUNC_SELECT_ARGTYPES
 AC_FUNC_FSEEKO
 
 dnl define _LARGE_FILES, _FILE_OFFSET_BITS and _LARGEFILE_SOURCE when

src/os_unix.c

@@ -18,17 +18,6 @@
  * changed beyond recognition.
  */
 
-/*
- * Some systems have a prototype for select() that has (int *) instead of
- * (fd_set *), which is wrong. This define removes that prototype. We define
- * our own prototype below.
- * Don't use it for the Mac, it causes a warning for precompiled headers.
- * TODO: use a configure check for precompiled headers?
- */
-#if !defined(__APPLE__) && !defined(__TANDEM)
-# define select select_declared_wrong
-#endif
-
 #include "vim.h"
 
 #ifdef FEAT_MZSCHEME
@@ -54,14 +43,9 @@ static int selinux_enabled = -1;
 # endif
 #endif
 
-/*
+#ifdef __BEOS__
- * Use this prototype for select, some include files have a wrong prototype
- */
-#ifndef __TANDEM
 # undef select
-# ifdef __BEOS__
 # define select	beos_select
-# endif
 #endif
 
 #ifdef __CYGWIN__
@@ -77,10 +61,6 @@ static int selinux_enabled = -1;
 # endif
 #endif
 
-#if defined(HAVE_SELECT)
-extern int   select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
-#endif
-
 #ifdef FEAT_MOUSE_GPM
 # include <gpm.h>
 /* <linux/keyboard.h> contains defines conflicting with "keymap.h",
@@ -6316,7 +6296,8 @@ select_eintr:
 	if (interrupted != NULL)
 	    *interrupted = FALSE;
 
-	ret = select(maxfd + 1, &rfds, &wfds, &efds, tvp);
+	ret = select(maxfd + 1, SELECT_TYPE_ARG234 &rfds,
+		      SELECT_TYPE_ARG234 &wfds, SELECT_TYPE_ARG234 &efds, tvp);
 	result = ret > 0 && FD_ISSET(fd, &rfds);
 	if (result)
 	    --ret;

src/version.c

@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    371,
 /**/
     370,
 /**/