jjb: Add missing build script for latency-tracker

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>

diff --git a/scripts/latency-tracker/build.sh b/scripts/latency-tracker/build.sh
new file mode 100755 (executable)
index 0000000..8e16edd
--- /dev/null
+++ b/scripts/latency-tracker/build.sh
@@ -0,0 +1,89 @@
+#!/bin/sh -exu
+#
+# Copyright (C) 2015 - Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
+#                      Michael Jeanson <mjeanson@efficios.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Kernel version compare functions
+verlte() {
+    [  "$1" = "`printf '%s\n%s' $1 $2 | sort -V | head -n1`" ]
+}
+
+verlt() {
+    [ "$1" = "$2" ] && return 1 || verlte $1 $2
+}
+
+vergte() {
+    [  "$1" = "`printf '%s\n%s' $1 $2 | sort -V | tail -n1`" ]
+}
+
+vergt() {
+    [ "$1" = "$2" ] && return 1 || vergte $1 $2
+}
+
+
+# Use all CPU cores
+NPROC=$(nproc)
+
+SRCDIR="${WORKSPACE}/src/latency-tracker"
+BUILDDIR="${WORKSPACE}/build"
+LNXSRCDIR="${WORKSPACE}/src/linux"
+LNXBINDIR="${WORKSPACE}/deps/linux/build"
+
+# Create build directory
+rm -rf "${BUILDDIR}"
+mkdir -p "${BUILDDIR}"
+
+# Enter source dir
+cd "${SRCDIR}"
+
+# Fix path to linux src in builddir Makefile
+sed -i "s#MAKEARGS := -C .*#MAKEARGS := -C ${LNXSRCDIR}#" "${LNXBINDIR}"/Makefile
+
+# Get kernel version from source tree
+cd "${LNXBINDIR}"
+KVERSION=$(make kernelversion)
+cd -
+
+# kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
+# timekeeping subsystem. We want those build to fail.
+if { vergte "$KVERSION" "3.10" && verlte "$KVERSION" "3.10.13"; } || \
+   { vergte "$KVERSION" "3.11" && verlte "$KVERSION" "3.11.2"; }; then
+
+    set +e
+
+    # Build modules
+    KERNELDIR="${LNXBINDIR}" make -j"${NPROC}" V=1
+
+    # We expect this build to fail, if it doesn't, fail the job.
+    if [ "$?" -eq 0 ]; then
+        exit 1
+    fi
+
+    # We have to publish at least one file or the build will fail
+    echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${BUILDDIR}/BROKEN.txt"
+
+    set -e
+
+else # Regular build
+
+    # Build modules
+    KERNELDIR="${LNXBINDIR}" make -j"${NPROC}" V=1
+
+    # Install modules to build dir
+    KERNELDIR="${LNXBINDIR}" make INSTALL_MOD_PATH="${BUILDDIR}" modules_install
+fi
+
+# EOF