Step6: add python and snake.

Now we have a programming environment and
we have a small game for amusement :).

Signed-off-by: Chen Wang <wangchen20@iscas.ac.cn>

package/libffi/make-host.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/bash
+source $(dirname "$0")/../common.sh
+
+PKGNAME=libffi
+PKGVERSION=3.4.8
+PKGSOURCE_DIR=libffi
+PKGSOURCE=libffi-3.4.8.tar.gz
+PKGURL=https://github.com/libffi/libffi/releases/download/v3.4.8/libffi-3.4.8.tar.gz
+
+PKGBUILDNAME=host-${PKGNAME}
+PKGBUILD_DIR=${BUILD_DIR}/${PKGBUILDNAME}-${PKGVERSION}
+
+echo "----> Building ${PKGBUILDNAME} ..."
+
+stamp_downloaded
+
+step_start extract
+mkdir -p ${PKGBUILD_DIR}
+gzip -d -c ${DL_DIR}/${PKGSOURCE_DIR}/${PKGSOURCE} | tar --strip-components=1 -C ${PKGBUILD_DIR} -xf -
+chmod -R +rw ${PKGBUILD_DIR}
+step_end extract
+
+step_start patch
+TAR="tar" PATH=${HOST_DIR}/bin:$PATH ${PROJECT_DIR}/support/scripts/apply-patches.sh ${PKGBUILD_DIR} ${PROJECT_DIR}/package/${PKGNAME} \*.patch
+step_end patch autotools ignore_libtool_patch
+
+step_start configure
+echo ">>> ${PKGBUILDNAME} ${PKGVERSION} Autoreconfiguring"
+cd ${PKGBUILD_DIR} && eval "AUTOPOINT=/bin/true ${AUTORECONF_OPTS} ${HOST_DIR}/bin/autoreconf -f -i" 
+patch_libtool ${PKGBUILD_DIR}
+(cd ${PKGBUILD_DIR} && rm -rf config.cache; eval "${HOST_CONFIGURE_OPTS} CONFIG_SITE=/dev/null ./configure --prefix=\"${HOST_DIR}\" --sysconfdir=\"${HOST_DIR}/etc\" --localstatedir=\"${HOST_DIR}/var\" --enable-shared --disable-static --disable-gtk-doc --disable-gtk-doc-html --disable-doc --disable-docs --disable-documentation --disable-debug --with-xmlto=no --with-fop=no --disable-nls --disable-dependency-tracking")
+step_end configure
+
+step_start build
+eval "${HOST_MAKE_ENV} /usr/bin/make -j${MAXNUM_CPUS}  -C ${PKGBUILD_DIR}"
+step_end build
+
+step_start install-host
+eval "${HOST_MAKE_ENV} /usr/bin/make -j${MAXNUM_CPUS} install -C ${PKGBUILD_DIR}"
+step_end install-host
+
+stamp_installed
+
+echo "<---- ${PKGBUILDNAME} build complete."