Index: head/graphics/mesa-dri/files/patch-configure
===================================================================
--- head/graphics/mesa-dri/files/patch-configure	(revision 473028)
+++ head/graphics/mesa-dri/files/patch-configure	(revision 473029)
@@ -1,63 +1,79 @@
 --- configure.orig	2018-01-23 18:08:55 UTC
 +++ configure
 @@ -21895,12 +21895,13 @@ case "$host_os" in
  darwin*)
      ;;
  *)
 -    for ac_func in clock_gettime
 +    for ac_func in clock_gettime clock_nanosleep
  do :
 -  ac_fn_c_check_func "$LINENO" "clock_gettime" "ac_cv_func_clock_gettime"
 -if test "x$ac_cv_func_clock_gettime" = xyes; then :
 +  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 +ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
 +if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
    cat >>confdefs.h <<_ACEOF
 -#define HAVE_CLOCK_GETTIME 1
 +#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
  _ACEOF
   CLOCK_LIB=
  else
 @@ -22559,11 +22559,20 @@ $as_echo "yes" >&6; }
  fi
  fi
  
 -ac_fn_c_check_header_mongrel "$LINENO" "linux/futex.h" "ac_cv_header_linux_futex_h" "$ac_includes_default"
 -if test "x$ac_cv_header_linux_futex_h" = xyes; then :
 -  DEFINES="$DEFINES -DHAVE_LINUX_FUTEX_H"
 +for ac_header in linux/futex.h sys/umtx.h
 +do :
 +  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 +ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "#include <errno.h>
 +     #include <sys/types.h>
 +"
 +if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
 +  cat >>confdefs.h <<_ACEOF
 +#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
 +_ACEOF
 + DEFINES="$DEFINES -DHAVE_LINUX_FUTEX_H"
  fi
  
 +done
  
  
  # Check whether --enable-selinux was given.
 @@ -23308,7 +23308,7 @@ fi
  
  
  case "$host_os" in
 -linux*)
 +linux* | freebsd*)
      dri3_default=yes
      ;;
  *)
+@@ -26765,13 +26765,13 @@
+     have_vdpau_platform=no
+ fi
+ 
+-if echo $platforms | grep -q "x11\|drm"; then
++if echo $platforms | egrep -q "x11|drm"; then
+     have_omx_platform=yes
+ else
+     have_omx_platform=no
+ fi
+ 
+-if echo $platforms | grep -q "x11\|drm\|wayland"; then
++if echo $platforms | egrep -q "x11|drm|wayland"; then
+     have_va_platform=yes
+ else
+     have_va_platform=no
 @@ -27096,9 +27106,6 @@ rm -f core conftest.err conftest.$ac_obj
          CLANG_LIBDIR=${LLVM_LIBDIR}
      fi
      CLANG_RESOURCE_DIR=$CLANG_LIBDIR/clang/${LLVM_VERSION}
 -    if test ! -f "$CLANG_RESOURCE_DIR/include/stddef.h"; then :
 -  as_fn_error $? "Could not find clang internal header stddef.h in $CLANG_RESOURCE_DIR Use --with-clang-libdir to specify the correct path to the clang libraries." "$LINENO" 5
 -fi
  fi
   if test "x$enable_opencl" = xyes; then
    HAVE_CLOVER_TRUE=