tce-load -i compiletc libtiff-dev libpng-dev giflib-dev

http://downloads.webmproject.org/releases/webp/libwebp-1.0.3.tar.gz

cd libwebp-1.0.3

CC="gcc -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" CXX="g++ -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" ./configure --prefix=/usr/local -disable-static --localstatedir=/var --enable-libwebpmux --enable-libwebpdemux --enable-libwebpdecoder --enable-libwebpextras --enable-swap-16bit-csp

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make [2m 22.08s]
sudo make install

WebP Configuration Summary
--------------------------

Shared libraries: yes
Static libraries: no
Threading support: yes
libwebp: yes
libwebpdecoder: yes
libwebpdemux: yes
libwebpmux: yes
libwebpextras: yes

Tools:
cwebp : yes
  Input format support
  ====================
  JPEG : yes
  PNG  : yes
  TIFF : yes
  WIC  : no
dwebp : yes
  Output format support
  =====================
  PNG  : yes
  WIC  : no
GIF support : yes
anim_diff   : yes
gif2webp    : yes
img2webp    : yes
webpmux     : yes
vwebp       : no
webpinfo    : yes
SDL support : no
vwebp_sdl   : no