configure.ac: Checking for available kernel backends instead of OS

The configure script now checks for availability of several backends like Linux's
joystick, Linux's evdev, BSD's usbhid. This way several backends can be compiled in and
used with the same binary module.
Backend selection code still missing!

1 files changed, 36 insertions, 19 deletions

diff --git a/configure.ac b/configure.ac
index a4fd447..6b1b489 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,24 +44,6 @@ AC_PROG_CC
 
 AH_TOP([#include "xorg-server.h"])
 
-case $host_os in
-  linux*)
-    IS_LINUX="yes"
-    ;;
-
-  freebsd* | kfreebsd-gnu* | netbsd* | openbsd*)
-    IS_BSD="yes"
-    ;;
-
-  *)
-    AC_MSG_ERROR([Your operating system is not supported by the joystick
-                  driver. Contact xorg@lists.freedesktop.org if you are 
-                  interested in porting it.])
-    ;;
-esac
-AM_CONDITIONAL(LINUX, [test "x$IS_LINUX" = xyes])
-AM_CONDITIONAL(BSD, [test "x$IS_BSD" = xyes])
-
 AC_ARG_WITH(xorg-module-dir,
             AC_HELP_STRING([--with-xorg-module-dir=DIR],
                            [Default xorg module directory 
@@ -78,7 +60,7 @@ if test "x$DEBUGGING" = xyes; then
 else
     AC_DEFINE(NDEBUG, 1, [Disable some debugging code])
 fi
-AM_CONDITIONAL(DEBUG, [test "x$DEBUGGING" = xyes])	   
+AM_CONDITIONAL(DEBUG, [test "x$DEBUGGING" = xyes])
 
 inputdir=${moduledir}/input
 AC_SUBST(inputdir)
@@ -99,9 +81,44 @@ AC_SUBST([CFLAGS])
 # Checks for libraries.
 
 # Checks for header files.
+linux_backend=yes
+AC_CHECK_HEADERS([linux/joystick.h],, [linux_backend=no])
+AM_CONDITIONAL(LINUX_BACKEND, [test "x$linux_backend" = xyes])
+if test "x$linux_backend" = xyes; then
+    AC_DEFINE(LINUX_BACKEND, 1, [Compile Linux joystick backend])
+fi
+
+bsd_backend=yes
+AC_CHECK_HEADERS([usbhid.h dev/usb/usb.h dev/usb/usbhid.h],, [bsd_backend=no])
+AC_CHECK_LIB([usbhid],[hid_get_item],, [bsd_backend=no])
+AM_CONDITIONAL(BSD_BACKEND, [test "x$bsd_backend" = xyes])
+if test "x$bsd_backend" = xyes; then
+    AC_DEFINE(BSD_BACKEND, 1, [Compile BSD usbhid backend])
+fi
+
+evdev_backend=yes
+AC_CHECK_HEADERS([linux/input.h],, [evdev_backend=no])
+AM_CONDITIONAL(EVDEV_BACKEND, [test "x$evdev_backend" = xyes])
+if test "x$evdev_backend" = xyes; then
+    AC_DEFINE(EVDEV_BACKEND, 1, [Compile Linux evdev backend])
+fi
+
 AC_HEADER_STDC
 
 XORG_MANPAGE_SECTIONS
 XORG_RELEASE_VERSION
 
 AC_OUTPUT([Makefile src/Makefile man/Makefile])
+
+echo 
+echo Building linux joystick backend: $linux_backend
+echo Building evdev backend: $evdev_backend
+echo Building BSD backend: $bsd_backend
+
+if test "x$linux_backend" != "xyes" -a \
+	"x$bsd_backend" != "xyes" -a \
+	"x$evdev_backend" != "xyes"; then
+    AC_MSG_ERROR([No backends were found. Your operating is not supported by the
+                  joystick driver. Contact xorg@lists.freedesktop.org if you are 
+                  interested in porting it.])
+fi