configure: Sort AC_ARG_WITH() calls.

configure

@@ -860,9 +860,9 @@ with_png
 with_pthread
 with_pulse
 with_sane
+with_sdl
 with_tiff
 with_udev
-with_sdl
 with_v4l
 with_vulkan
 with_xcomposite
@@ -2436,9 +2436,9 @@ Optional Packages:
   --without-pthread       do not use the pthread library
   --without-pulse         do not use PulseAudio sound support
   --without-sane          do not use SANE (scanner support)
+  --without-sdl           do not use SDL
   --without-tiff          do not use TIFF
   --without-udev          do not use udev (plug and play support)
-  --without-sdl           do not use SDL
   --without-v4l           do not use v4l1 (v4l support)
   --without-vulkan        do not use Vulkan
   --without-xcomposite    do not use the Xcomposite extension
@@ -3737,6 +3737,12 @@ if test "${with_sane+set}" = set; then :
 fi
 
 
+# Check whether --with-sdl was given.
+if test "${with_sdl+set}" = set; then :
+  withval=$with_sdl;
+fi
+
+
 # Check whether --with-tiff was given.
 if test "${with_tiff+set}" = set; then :
   withval=$with_tiff;
@@ -3749,12 +3755,6 @@ if test "${with_udev+set}" = set; then :
 fi
 
 
-# Check whether --with-sdl was given.
-if test "${with_sdl+set}" = set; then :
-  withval=$with_sdl;
-fi
-
-
 # Check whether --with-v4l was given.
 if test "${with_v4l+set}" = set; then :
   withval=$with_v4l;

configure.ac

@@ -77,9 +77,9 @@ AC_ARG_WITH(pthread,   AS_HELP_STRING([--without-pthread],[do not use the pthrea
             [if test "x$withval" = "xno"; then ac_cv_header_pthread_h=no; fi])
 AC_ARG_WITH(pulse,     AS_HELP_STRING([--without-pulse],[do not use PulseAudio sound support]))
 AC_ARG_WITH(sane,      AS_HELP_STRING([--without-sane],[do not use SANE (scanner support)]))
+AC_ARG_WITH(sdl,       AS_HELP_STRING([--without-sdl],[do not use SDL]))
 AC_ARG_WITH(tiff,      AS_HELP_STRING([--without-tiff],[do not use TIFF]))
 AC_ARG_WITH(udev,      AS_HELP_STRING([--without-udev],[do not use udev (plug and play support)]))
-AC_ARG_WITH(sdl,       AS_HELP_STRING([--without-sdl],[do not use SDL]))
 AC_ARG_WITH(v4l,       AS_HELP_STRING([--without-v4l],[do not use v4l1 (v4l support)]))
 AC_ARG_WITH(vulkan,    AS_HELP_STRING([--without-vulkan],[do not use Vulkan]))
 AC_ARG_WITH(xcomposite,AS_HELP_STRING([--without-xcomposite],[do not use the Xcomposite extension]),