When configuring PHP it says to use --enable-gd-native-ttf, but if configure actually checks for --enable-gd-native-tt.

configure, line 496:

  --enable-gd-native-ttf    GD: Enable TrueType string function in gd"

configure, line 17676:

echo $ac_n "checking whether to enable truetype string function in gd""... $ac_c" 1>&6
echo "configure:17678: checking whether to enable truetype string function in gd" >&5
# Check whether --enable-gd-native-tt or --disable-gd-native-tt was given.
if test "${enable_gd_native_tt+set}" = set; then
  enableval="$enable_gd_native_tt"
  PHP_GD_NATIVE_TT=$enableval
else
  PHP_GD_NATIVE_TT=no
fi