version=1.6.35
src_name=libpng
archive_name=$src_name-$version.tar.xz
url0=http://download.sourceforge.net/$src_name/$archive_name

src_dir=$src_dir_root/$src_name-$version
cd $src_dir_root
rm -Rf $src_name-$version
tar xf $archive_name

build_dir=$builds_dir_root/$src_name-$version
rm -Rf $build_dir
mkdir -p $build_dir
cd $build_dir

OLD_PATH=$PATH
export PATH=$x86_cross_toolchain_dir_root/bin:$x86_prefix/bin:$PATH

export "PKG_CONFIG_LIBDIR=\
$x86_prefix/lib/pkgconfig:\
$x86_prefix/devel/lib/pkgconfig"

export "CPPFLAGS=-I$x86_prefix/devel/include-glibc-linux $(pkg-config --cflags-only-I zlib)"
export "CC=$x86_target_gnu_triple-gcc -B$x86_prefix/lib -L$x86_prefix/lib -static-libgcc -static-libstdc++"
export 'CFLAGS=-O2 -pipe -fPIC'
export "LDFLAGS=$(pkg-config --libs-only-L zlib)"
$src_dir/configure			\
	--build=$x86_target_gnu_triple	\
	--host=$x86_target_gnu_triple	\
	--prefix=$x86_prefix		\
	--enable-shared			\
	--disable-static
unset LDFLAGS
unset CFLAGS
unset CC
unset CPPFLAGS
unset PKG_CONFIG_LIBDIR

make
make install 

export PATH=$OLD_PATH

# cleanup libtool files
find $x86_prefix -type f -o -type l -iname '*.la' | xargs rm -f

rm -Rf $install_tmp_dir $build_dir $src_dir