Clear buildroot source after building

This saves an enormous amount of disk space in the image. Since fewer
packages are installed, there is a method for installing extra
packages.

This also adds a helper script for setting up common cross-compiling
variables.

1 files changed, 19 insertions, 0 deletions

diff --git a/build_toolchain.sh b/build_toolchain.sh
new file mode 100755
index 0000000..7562c57
--- /dev/null
+++ b/build_toolchain.sh
@@ -0,0 +1,19 @@
+#! /bin/bash
+
+set -xe
+
+BR_DIR=buildroot-${BUILDROOT_VERSION:-"2016.05"}
+BR_TAR=${BR_DIR}.tar.bz2
+BR_URL=https://buildroot.org/downloads/${BR_TAR}
+
+echo ${BR_DIR} && wget ${BR_URL} && ls -l && tar xf ${BR_TAR} && rm -f ${BR_TAR}
+
+pushd ${BR_DIR}
+make trimui_defconfig BR2_EXTERNAL=../trimui_config
+make toolchain
+
+for patch in ../*.patch; do patch -p0 < $patch; done
+make
+
+popd
+rm -r ${BR_DIR}