configure: Added special check for broken linux/capi.h.

configure

@@ -7038,7 +7038,6 @@ done
 
 
 
-
 for ac_header in \
 	IOKit/IOKitLib.h \
 	alsa/asoundlib.h \
@@ -7065,7 +7064,6 @@ for ac_header in \
 	ldap.h \
 	libaudioio.h \
 	link.h \
-	linux/capi.h \
 	linux/cdrom.h \
 	linux/compiler.h \
 	linux/hdreg.h \
@@ -7351,6 +7349,67 @@ fi
 
 
 
+for ac_header in linux/capi.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#define __user
+
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  eval "$as_ac_Header=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+eval "$as_ac_Header=no"
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+
 if test "$have_x" = "yes"
 then
     XLIB="-lXext -lX11"

configure.ac

@@ -197,7 +197,6 @@ AC_CHECK_HEADERS(\
 	ldap.h \
 	libaudioio.h \
 	link.h \
-	linux/capi.h \
 	linux/cdrom.h \
 	linux/compiler.h \
 	linux/hdreg.h \
@@ -278,6 +277,9 @@ AC_CHECK_HEADERS(\
 )
 AC_HEADER_STAT()
 
+dnl Check for broken kernel header that doesn't define __user
+AC_CHECK_HEADERS([linux/capi.h],,,[#define __user])
+
 dnl **** Check for X11 ****
 
 if test "$have_x" = "yes"