source $setup

tar -xf $src
mv libXext-* xext

mkdir build
cd build

PKG_CONFIG=pkg-config-cross \
../xext/configure --prefix=$out $configure_flags

make

make install

sed -i 's/Requires.private/Requires/' $out/lib/pkgconfig/*.pc

ln -sf $xextproto/lib/pkgconfig/*.pc $out/lib/pkgconfig/
ln -sf $libx11/lib/pkgconfig/*.pc $out/lib/pkgconfig/