abinfo "Building pngminus (png2pnm, pnm2png) components ..."
cd "$SRCDIR"/contrib/pngminus
make png2pnm pnm2png

abinfo "Installing pngminus (png2pnm, pnm2png) components ..."
install -vm755 png2pnm pnm2png \
    "$PKGDIR/usr/bin/"
ln -sv png2pnm \
    "$PKGDIR"/usr/bin/pngtopnm
ln -sv pnm2png \
    "$PKGDIR"/usr/bin/pnmtopng
