From 5c9577476f6df52ee93e6d9bfc4affa81d81f7a0 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Mon, 23 Nov 2020 22:14:22 -0500
Subject: [PATCH] joystick: Fix up Linux joystick code to (mostly) compile on
 FreeBSD.

---
 configure                              | 54 +++++++++++++++++---------
 configure.ac                           | 30 ++++++++++----
 src/joystick/linux/SDL_sysjoystick_c.h |  4 ++
 3 files changed, 62 insertions(+), 26 deletions(-)

diff --git a/configure b/configure
index 68425f01c..cbbe98197 100755
--- a/configure
+++ b/configure
@@ -768,7 +768,6 @@ infodir
 docdir
 oldincludedir
 includedir
-runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -978,7 +977,6 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
-runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE}'
@@ -1231,15 +1229,6 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
-  -runstatedir | --runstatedir | --runstatedi | --runstated \
-  | --runstate | --runstat | --runsta | --runst | --runs \
-  | --run | --ru | --r)
-    ac_prev=runstatedir ;;
-  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
-  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
-  | --run=* | --ru=* | --r=*)
-    runstatedir=$ac_optarg ;;
-
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1377,7 +1366,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir runstatedir
+		libdir localedir mandir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1530,7 +1519,6 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
-  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -22724,9 +22712,35 @@ $as_echo "#define SDL_VIDEO_VULKAN 1" >>confdefs.h
 
 CheckInputEvents()
 {
-            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Linux 2.4 unified input interface" >&5
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Linux 2.4 unified input interface" >&5
 $as_echo_n "checking for Linux 2.4 unified input interface... " >&6; }
-        use_input_events=no
+    use_input_events=no
+
+        cat confdefs.h - <<_ACEOF >conftest.$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.  */
 
@@ -22750,14 +22764,16 @@ if ac_fn_c_try_compile "$LINENO"; then :
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $use_input_events" >&5
+    fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $use_input_events" >&5
 $as_echo "$use_input_events" >&6; }
-        if test x$use_input_events = xyes; then
+    if test x$use_input_events = xyes; then
 
 $as_echo "#define SDL_INPUT_LINUXEV 1" >>confdefs.h
 
-            SUMMARY_input="${SUMMARY_input} linuxev"
-        fi
+      SUMMARY_input="${SUMMARY_input} linuxev"
+    fi
 }
 
 CheckInputKD()
diff --git a/configure.ac b/configure.ac
index 2c83fd4e0..d9b1e3eed 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2603,8 +2603,22 @@ dnl See if we can use the new unified event interface in Linux 2.4
 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
+    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$use_input_events = xno; then
         AC_TRY_COMPILE([
           #include <linux/input.h>
         ],[
@@ -2614,11 +2628,13 @@ CheckInputEvents()
         ],[
         use_input_events=yes
         ])
-        AC_MSG_RESULT($use_input_events)
-        if test x$use_input_events = xyes; then
-            AC_DEFINE(SDL_INPUT_LINUXEV, 1, [ ])
-            SUMMARY_input="${SUMMARY_input} linuxev"
-        fi
+    fi
+
+    AC_MSG_RESULT($use_input_events)
+    if test x$use_input_events = xyes; then
+      AC_DEFINE(SDL_INPUT_LINUXEV, 1, [ ])
+      SUMMARY_input="${SUMMARY_input} linuxev"
+    fi
 }
 
 dnl See if we can use the kernel kd.h header
diff --git a/src/joystick/linux/SDL_sysjoystick_c.h b/src/joystick/linux/SDL_sysjoystick_c.h
index bcbc2550d..897c925ba 100644
--- a/src/joystick/linux/SDL_sysjoystick_c.h
+++ b/src/joystick/linux/SDL_sysjoystick_c.h
@@ -22,7 +22,11 @@
 #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;