configure: Assume that unistd.h is available on Unix.

configure

@@ -8714,12 +8714,6 @@ then :
   printf "%s\n" "#define HAVE_SYSCALL_H 1" >>confdefs.h
 
 fi
-ac_fn_c_check_header_compile "$LINENO" "unistd.h" "ac_cv_header_unistd_h" "$ac_includes_default"
-if test "x$ac_cv_header_unistd_h" = xyes
-then :
-  printf "%s\n" "#define HAVE_UNISTD_H 1" >>confdefs.h
-
-fi
 ac_fn_c_check_header_compile "$LINENO" "utime.h" "ac_cv_header_utime_h" "$ac_includes_default"
 if test "x$ac_cv_header_utime_h" = xyes
 then :

configure.ac

@@ -511,7 +511,6 @@ AC_CHECK_HEADERS(\
 	sys/vnode.h \
 	sys/wait.h \
 	syscall.h \
-	unistd.h \
 	utime.h \
 	valgrind/memcheck.h \
 	valgrind/valgrind.h

dlls/nsiproxy.sys/ndis.c

@@ -25,10 +25,7 @@
 #include "config.h"
 
 #include <stdarg.h>
-
-#ifdef HAVE_UNISTD_H
 #include <unistd.h>
-#endif
 
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>

dlls/nsiproxy.sys/tcp.c

@@ -27,15 +27,12 @@
 #include <stdarg.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include <unistd.h>
 
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
 
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif

dlls/ntdll/unix/env.c

@@ -33,18 +33,14 @@
 #include <stdarg.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
-#ifdef HAVE_SYS_STAT_H
-# include <sys/stat.h>
-#endif
+#include <sys/stat.h>
+#include <unistd.h>
 #ifdef HAVE_SYS_PRCTL_H
 # include <sys/prctl.h>
 #endif
 #ifdef HAVE_PWD_H
 # include <pwd.h>
 #endif
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
 #ifdef __APPLE__
 # include <CoreFoundation/CFLocale.h>
 # include <CoreFoundation/CFString.h>

dlls/ntdll/unix/file.c

@@ -105,9 +105,7 @@
 #include <sys/statfs.h>
 #endif
 #include <time.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #include "ntstatus.h"
 #define WIN32_NO_STATUS

dlls/qcap/v4l.c

@@ -48,9 +48,7 @@
 #ifdef HAVE_LINUX_VIDEODEV2_H
 #include <linux/videodev2.h>
 #endif
-#ifdef HAVE_UNISTD_H
 #include <unistd.h>
-#endif
 
 #include "ntstatus.h"
 #define WIN32_NO_STATUS

dlls/winealsa.drv/midi.c

@@ -36,9 +36,7 @@
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
 

dlls/wineandroid.drv/window.c

@@ -32,9 +32,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #define OEMRESOURCE
 #include "windef.h"

dlls/winebus.sys/bus_udev.c

@@ -31,9 +31,7 @@
 #include <stdint.h>
 #include <sys/types.h>
 #include <dirent.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #include <poll.h>
 #ifdef HAVE_LIBUDEV_H
 # include <libudev.h>

dlls/winejoystick.drv/joystick_linux.c

@@ -39,9 +39,7 @@
 
 #ifdef HAVE_LINUX_22_JOYSTICK_API
 
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

dlls/winex11.drv/clipboard.c

@@ -69,9 +69,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #include <fcntl.h>
 #include <dlfcn.h>
 #include <limits.h>

dlls/winex11.drv/systray.c

@@ -26,9 +26,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #include <X11/Xlib.h>
 

dlls/winex11.drv/window.c

@@ -25,9 +25,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #include <X11/Xlib.h>
 #include <X11/Xresource.h>

dlls/winex11.drv/x11drv_main.c

@@ -29,9 +29,7 @@
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #include <dlfcn.h>
 #include <X11/cursorfont.h>
 #include <X11/Xlib.h>

dlls/winex11.drv/xdnd.c

@@ -22,9 +22,7 @@
 #include "config.h"
 
 #include <string.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #include <stdarg.h>
 #include <stdio.h>
 

tools/tools.h

@@ -30,9 +30,6 @@
 #include <fcntl.h>
 #include <time.h>
 #include <errno.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
 
 #ifdef _WIN32
 # include <direct.h>

tools/widl/parser.l

@@ -51,12 +51,7 @@ double	[0-9]+\.[0-9]+([eE][+-]?[0-9]+)*
 #include <assert.h>
 #include <errno.h>
 #include <limits.h>
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#else
 #define YY_NO_UNISTD_H
-#endif
 
 #include "widl.h"
 #include "utils.h"

tools/wrc/parser.l

@@ -104,12 +104,7 @@ ws	[ \f\t\r]
 #include <assert.h>
 #include <errno.h>
 #include <limits.h>
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#else
 #define YY_NO_UNISTD_H
-#endif
 
 #include "../tools.h"
 #include "wrc.h"

tools/wrc/ppl.l

@@ -168,9 +168,7 @@ ul	[uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
 # define ULLONG_MAX ((__int64)0xffffffff << 32 | 0xffffffff)
 #endif
 
-#ifndef HAVE_UNISTD_H
 #define YY_NO_UNISTD_H
-#endif
 
 #include "../tools.h"
 #include "utils.h"