Teach install-build-deps.sh --arm how to install the arm root image.

build/install-build-deps.sh

Index: build/install-build-deps.sh
diff --git a/build/install-build-deps.sh b/build/install-build-deps.sh
index fb3833e67a1e8d4359cd2d791516167b0bf17ece..5d0fafaba58ac9590ad2f6c0f6dbd69581d70e15 100755
--- a/build/install-build-deps.sh
+++ b/build/install-build-deps.sh
@@ -195,11 +195,28 @@ fi
 
 if test "$do_inst_arm" = "1"; then
   . /etc/lsb-release
-  if test "$DISTRIB_CODENAME" != "precise"; then
+  if [ "$DISTRIB_CODENAME" != "precise" ]; then
     echo "ERROR: Installing the ARM cross toolchain is only available on" \
          "Ubuntu precise." >&2
     exit 1
   fi
+
+  ROOT="$(dirname ${BASH_SOURCE[0]})"
+  ROOT="$(dirname ${ROOT})"
+  SYSROOT="${ROOT}/out/arm_root"
+  if [ ! -d ${SYSROOT} ]; then
+    echo "Installing ARM root image."
+    tarball=$(pwd)/out/naclsdk_linux_arm-trusted.tgz

[Lei Zhang, 2012/11/16 23:43:38]

Do you need to keep the tarball afterwards? Can you put in a tmp dir and then
delete it after untarring?

[Sam Clegg, 2012/12/05 23:18:07]

Done.

+    TC_URL_PREFIX=https://commondatastorage.googleapis.com/nativeclient-archive2/toolchain
+    TC_REV=8000
+
+    curl -L \

[tony, 2012/11/16 23:50:06]

It seems like at this point, curl hasn't been installed by this script yet.

[Sam Clegg, 2012/12/05 23:18:07]

Done.

+       ${TC_URL_PREFIX}/${TC_REV}/naclsdk_linux_arm-trusted.tgz \
+       -o ${tarball}
+
+    mkdir -p ${SYSROOT}
+    tar zxf ${tarball} -C ${SYSROOT}
+  fi
   echo "Installing ARM cross toolchain."
 else
   echo "Skipping installation of ARM cross toolchain."