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-rw-r--r--INSTALL6
1 files changed, 6 insertions, 0 deletions
diff --git a/INSTALL b/INSTALL
index a3f12c5244f..02d5a09d63c 100644
--- a/INSTALL
+++ b/INSTALL
@@ -187,6 +187,7 @@ X11 is being used.
X libtiff for TIFF: http://www.simplesystems.org/libtiff/
X libgif for GIF: http://giflib.sourceforge.net/
librsvg2 for SVG: https://wiki.gnome.org/Projects/LibRsvg
+ libwebp for WebP: https://developers.google.com/speed/webp/
If you supply the appropriate --without-LIB option, 'configure' will
omit the corresponding library from Emacs, even if that makes for a
@@ -313,6 +314,7 @@ or more of these options:
--without-gif for GIF image support
--without-png for PNG image support
--without-rsvg for SVG image support
+ --without-webp for WebP image support
Although ImageMagick support is disabled by default due to security
and stability concerns, you can enable it with --with-imagemagick.
@@ -322,6 +324,10 @@ Use --without-toolkit-scroll-bars to disable Motif or Xaw3d scroll bars.
Use --without-xim to inhibit the default use of X Input Methods.
In this case, the X resource useXIM can be used to turn on use of XIM.
+Use --with-xinput2 to enable the use of version 2 of the X Input
+Extension. This enables support for touchscreens, pinch gestures, and
+scroll wheels that report scroll deltas at pixel-level precision.
+
Use --disable-largefile to omit support for files larger than 2GB, and
--disable-year2038 to omit support for timestamps past the year 2038,
on systems which allow omitting such support. This may help when