Fixed building on FreeBSD

Alex S

Looks like we have a collision with https://hg.libsdl.org/SDL/rev/cd774daff9f6. (Again, the headers in the base system are intended for drivers and should not be used for compiling non-base applications. At least that's the policy for now: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240964#c19.)

configure

@@ -22715,32 +22715,6 @@ CheckInputEvents()
             { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Linux 2.4 unified input interface" >&5
 $as_echo_n "checking for Linux 2.4 unified input interface... " >&6; }
         use_input_events=no
-
-        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-      #include <dev/evdev/input.h>
-
-int
-main ()
-{
-
-      #ifndef EVIOCGNAME
-      #error EVIOCGNAME() ioctl not available
-      #endif
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-      use_input_events=yes
-
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-        if test x$use_input_events = xno; then
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -22764,8 +22738,6 @@ if ac_fn_c_try_compile "$LINENO"; then :
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-    fi
-
         { $as_echo "$as_me:${as_lineno-$LINENO}: result: $use_input_events" >&5
 $as_echo "$use_input_events" >&6; }
         if test x$use_input_events = xyes; then

configure.ac

@@ -2605,20 +2605,6 @@ CheckInputEvents()
     dnl Check for Linux 2.4 unified input event interface support
         AC_MSG_CHECKING(for Linux 2.4 unified input interface)
         use_input_events=no
-
-    dnl FreeBSD puts this in /usr/include/dev/evdev/input.h ...
-    AC_TRY_COMPILE([
-      #include <dev/evdev/input.h>
-    ],[
-      #ifndef EVIOCGNAME
-      #error EVIOCGNAME() ioctl not available
-      #endif
-    ],[
-      use_input_events=yes
-    ])
-
-    dnl And Linux of course puts it in linux/input.h ...
-    if test x$use_input_events = xno; then
         AC_TRY_COMPILE([
           #include <linux/input.h>
         ],[
@@ -2628,8 +2614,6 @@ CheckInputEvents()
         ],[
         use_input_events=yes
         ])
-    fi
-
         AC_MSG_RESULT($use_input_events)
         if test x$use_input_events = xyes; then
             AC_DEFINE(SDL_INPUT_LINUXEV, 1, [ ])

src/joystick/linux/SDL_sysjoystick_c.h

@@ -22,11 +22,7 @@
 #ifndef SDL_sysjoystick_c_h_
 #define SDL_sysjoystick_c_h_
 
-#ifdef __linux__
 #include <linux/input.h>
-#else  /* FreeBSD (and maybe others) */
-#include <dev/evdev/input.h>
-#endif
 
 struct SDL_joylist_item;