diff --git a/contrib/jenkins-build-common.sh b/contrib/jenkins-build-common.sh
new file mode 100644
index 0000000..921434d
--- /dev/null
+++ b/contrib/jenkins-build-common.sh
@@ -0,0 +1,152 @@
+#!source_this_file
+
+# Common parts for osmo-gsm-tester jenkins build scripts. Use like in below example:
+#
+#--------------
+# #!/bin/sh
+# set -e -x
+# base="$PWD"
+# name="osmo-name"
+# . "$(dirname "$0")/jenkins-build-common.sh"
+#
+# build_repo libosmocore --configure --opts
+# build_repo libosmo-foo special_branch --configure --opts
+# build_repo osmo-bar
+#
+# create_bin_tgz
+#--------------
+#
+# Some explanations:
+#
+# To allow calling from arbitrary working directories, other scripts should
+# source this file like shown above.
+#
+# Sourcing scripts must provide some variables/functions, see above.
+# In addition, these values can optionally be passed to override:
+# git_url, prefix, prefix_real, BUILD_NUMBER
+#
+# CONFIGURE_FLAGS may contain flags that should be passed to all builds'
+# ./configure steps (useful e.g. for building in the sysmobts SDK).
+#
+# For each built repository, a specific git branch or hash can be provided by
+# environment variable: OSMO_GSM_TESTER_BUILD_$repo="<git-hash>"
+# NOTE: convert $repo's dashes to underscore. For example:
+#  OSMO_GSM_TESTER_BUILD_osmo_hlr="f001234abc"
+#  OSMO_GSM_TESTER_BUILD_libosmocore="my/branch"
+# ("origin/" is prepended to branch names automatically)
+
+if [ -z "$name" -o -z "$base" ]; then
+  set +x
+  echo "Some environment variables are not provided as required by jenkins-build-common.sh. Error."
+  exit 1
+fi
+
+git_url="${git_url-"git://git.osmocom.org"}"
+prefix="${prefix-"$base/inst-$name"}"
+# prefix_real is usually identical with prefix, except when installing to a
+# different $DESTDIR than /, which is the case for example when building
+# osmo-bts within the sysmoBTS SDK
+prefix_real="${prefix_real-"$prefix"}"
+
+export PKG_CONFIG_PATH="$prefix_real/lib/pkgconfig:$PKG_CONFIG_PATH"
+export LD_LIBRARY_PATH="$prefix_real/lib:$LD_LIBRARY_PATH"
+
+# Show current environment. Sometimes the LESS_ vars have ansi colors making a
+# mess, so exclude those.
+env | grep -v "^LESS" | sort
+
+# clean the workspace
+rm -f "$base/${name}"*.tgz rm -f "$base/${name}"*.md5
+rm -rf "$prefix_real"
+mkdir -p "$prefix_real"
+
+have_repo() {
+  repo="$1"
+  branch="${2-master}"
+
+  # Evaluate environment for instructions to build a specific git hash.
+  # Using a hash as $branch above unfortunately doesn't work.
+  branch_override_var="$(echo "OSMO_GSM_TESTER_BUILD_$repo" | sed 's/-/_/g')"
+  branch_override="$(eval "echo \$$branch_override_var")"
+  if [ -n "$branch_override" ]; then
+    branch="$branch_override"
+  fi
+
+  cd "$base"
+  if [ ! -d "$repo" ]; then
+    git clone "$git_url/$repo" "$repo"
+  fi
+  cd "$repo"
+  rm -rf *
+  git fetch origin
+
+  # Figure out whether we need to prepend origin/ to find branches in upstream
+  if ! git rev-parse "$branch"; then
+    branch="origin/$branch"
+  fi
+
+  git reset --hard "$branch"
+
+  git rev-parse HEAD
+
+  cd "$base"
+}
+
+build_repo() {
+  # usage: build_repo <name> [<branch>] [--configure-opts [...]]
+  dep="$1"
+  branch="master"
+  if [ -z "$(echo "$2" | grep '^-')" ]; then
+    # second arg does not start with a dash, it's empty or a branch
+    branch="$2"
+    if [ -n "$branch" ]; then
+      # we had a branch arg, need to shift once more to get config options
+      shift
+    else
+      branch="master"
+    fi
+  fi
+  shift
+  configure_opts="$@"
+
+  set +x; echo "
+
+====================== $dep
+
+"; set -x
+
+
+  have_repo "$dep" "$branch"
+
+  cd "$dep"
+
+  echo "$(git rev-parse HEAD) $dep" >> "$prefix_real/${name}_git_hashes.txt"
+
+  # special shim: we know the openbsc.git needs to be built in the openbsc/ subdir.
+  if [ "$dep" = "openbsc" ]; then
+    cd openbsc
+  fi
+
+  set +x; echo; echo; set -x
+  autoreconf -fi
+  set +x; echo; echo; set -x
+  ./configure --prefix="$prefix" $CONFIGURE_FLAGS $configure_opts
+  set +x; echo; echo; set -x
+  make -j8 || make  # libsmpp34 can't build in parallel
+  set +x; echo; echo; set -x
+  make install
+}
+
+create_bin_tgz() {
+  # don't package documentation -- the libosmocore docs can be up to 16 Mb large,
+  # a significant amount compared to the binaries
+  rm -rf "$prefix_real/share/doc/{libosmocore,libosmo-sccp}" || true
+
+  # build the archive that is going to be copied to the tester
+  cd "$prefix_real"
+  this="$name.build-${BUILD_NUMBER-$(date +%Y-%m-%d_%H_%M_%S)}"
+  tar="${this}.tgz"
+  tar czf "$base/$tar" *
+  cd "$base"
+  md5sum "$tar" > "${this}.md5"
+}
diff --git a/contrib/jenkins-build-osmo-bts-sysmo.sh b/contrib/jenkins-build-osmo-bts-sysmo.sh
index 9838834..dad2151 100755
--- a/contrib/jenkins-build-osmo-bts-sysmo.sh
+++ b/contrib/jenkins-build-osmo-bts-sysmo.sh
@@ -1,92 +1,23 @@
 #!/bin/sh
 set -e -x
 
-deps="
-libosmocore
-libosmo-abis
-osmo-bts
-"
+poky="/opt/poky/1.5.4"
+. "$poky/environment-setup-armv5te-poky-linux-gnueabi"
+
+# Cross-compilation: all installations need to be put in the sysmo SDK sysroot
+export DESTDIR="$poky/sysroots/armv5te-poky-linux-gnueabi"
 
 base="$PWD"
-rm -f "$base/osmo-bts-sysmo.*.tgz"
-
-have_repo() {
-	repo="$1"
-	cd "$base"
-	if [ ! -d "$repo" ]; then
-		git clone "git://git.osmocom.org/$repo" "$repo"
-	fi
-	cd "$repo"
-	git clean -dxf
-	git fetch origin
-	git reset --hard origin/master
-	git rev-parse HEAD
-	cd "$base"
-}
-
-for dep in $deps; do
-    have_repo "$dep"
-done
+name="osmo-bts-sysmo"
+prefix="/usr/local/jenkins-build/inst-$name"
+prefix_real="$DESTDIR$prefix"
+. "$(dirname "$0")/jenkins-build-common.sh"
 
 # for gsm_data_shared.h
 have_repo openbsc
 
-. /opt/poky/1.5.4/environment-setup-armv5te-poky-linux-gnueabi
+build_repo libosmocore --disable-pcsc
+build_repo libosmo-abis
+build_repo osmo-bts --enable-sysmocom-bts --with-openbsc=$base/openbsc/openbsc/include
 
-# Cross-compilation: all installations need to be put in the sysmo SDK sysroot
-export DESTDIR="/opt/poky/1.5.4/sysroots/armv5te-poky-linux-gnueabi"
-
-prefix_base="/usr/local/jenkins-build"
-prefix_base_real="$DESTDIR$prefix_base"
-rm -rf "$prefix_base_real"
-
-prefix="$prefix_base/inst-osmo-bts-sysmo"
-prefix_real="$DESTDIR$prefix"
-mkdir -p "$prefix_real"
-
-# Installation in non-system dir, but keep the PKG_CONFIG_PATH from the SDK:
-export PKG_CONFIG_PATH="$prefix_real/lib/pkgconfig:$PKG_CONFIG_PATH"
-
-env
-
-for dep in $deps; do
-	set +x; echo "
-
-====================== $dep
-
-"; set -x
-
-        cd "$base/$dep"
-        rm -rf *
-        git checkout .
-
-        echo "$(git rev-parse HEAD) $dep" >> "$prefix_real/osmo-bts-sysmo_git_hashes.txt"
-
-        autoreconf -fi
-
-        config_opts=""
-        case "$dep" in
-        'libosmocore')    config_opts="--disable-pcsc" ;;
-        'osmo-bts')       config_opts="--enable-sysmocom-bts --with-openbsc=$base/openbsc/openbsc/include" ;;
-        esac
-
-	set +x;	echo; echo; set -x
-        ./configure --prefix="$prefix" $CONFIGURE_FLAGS $config_opts
-	set +x;	echo; echo; set -x
-        make -j8
-	set +x;	echo; echo; set -x
-        make install
-done
-
-# don't package documentation -- the libosmocore docs can be up to 16 Mb large,
-# a significant amount compared to the binaries
-rm -rf "$prefix_real/share/doc"
-
-# build the archive that is going to be copied to the tester and then to the BTS
-rm "$base"/*.tgz "$base"/*.md5 || true
-cd "$prefix_real"
-this="osmo-bts-sysmo.build-${BUILD_NUMBER}"
-tar="${this}.tgz"
-tar czf "$base/$tar" *
-cd "$base"
-md5sum "$tar" > "${this}.md5"
+create_bin_tgz
diff --git a/contrib/jenkins-build-osmo-bts-trx.sh b/contrib/jenkins-build-osmo-bts-trx.sh
index 1b1d94e..3e61b70 100755
--- a/contrib/jenkins-build-osmo-bts-trx.sh
+++ b/contrib/jenkins-build-osmo-bts-trx.sh
@@ -1,82 +1,15 @@
 #!/bin/sh
-set -x -e
-
+set -e -x
 base="$PWD"
-prefix="$base/inst-osmo-bts-trx"
-
-rm -f "$base/osmo-bts-trx*.tgz"
-
-deps="
-libosmocore
-libosmo-abis
-osmo-trx
-osmo-bts
-"
-
-have_repo() {
-	repo="$1"
-	cd "$base"
-	if [ ! -d "$repo" ]; then
-		git clone "git://git.osmocom.org/$repo" "$repo"
-	fi
-	cd "$repo"
-	git clean -dxf
-	git fetch origin
-	git reset --hard origin/master
-	git rev-parse HEAD
-	cd "$base"
-}
+name="osmo-bts-trx"
+. "$(dirname "$0")/jenkins-build-common.sh"
 
 # for gsm_data_shared.*
 have_repo openbsc
 
+build_repo libosmocore
+build_repo libosmo-abis
+build_repo osmo-trx --without-sse
+build_repo osmo-bts --enable-trx --with-openbsc=$base/openbsc/openbsc/include
 
-rm -rf "$prefix"
-mkdir -p "$prefix"
-
-export PKG_CONFIG_PATH="$prefix/lib/pkgconfig"
-export LD_LIBRARY_PATH="$prefix/lib"
-
-for dep in $deps; do
-	set +x; echo "
-
-====================== $dep
-
-"; set -x
-
-	have_repo "$dep"
-	cd "$dep"
-	rm -rf *
-	git checkout .
-
-	echo "$(git rev-parse HEAD) $dep" >> "$prefix/osmo-bts-trx_osmo-trx_git_hashes.txt"
-
-	autoreconf -fi
-
-	config_opts=""
-
-	case "$repo" in
-	'osmo-bts') config_opts="--enable-trx --with-openbsc=$base/openbsc/openbsc/include" ;;
-	'osmo-trx') config_opts="--without-sse" ;;
-	esac
-
-	set +x;	echo; echo; set -x
-	./configure --prefix="$prefix" $config_opts
-	set +x;	echo; echo; set -x
-	make -j8
-	set +x;	echo; echo; set -x
-	make install
-done
-
-# don't package documentation -- the libosmocore docs can be up to 16 Mb large,
-# a significant amount compared to the binaries
-rm -rf "$prefix/share/doc"
-
-# build the archive that is going to be copied to the tester
-rm "$base"/*.tgz "$base"/*.md5 || true
-cd "$prefix"
-this="osmo-bts-trx.build-${BUILD_NUMBER}"
-tar="${this}.tgz"
-tar czf "$base/$tar" *
-cd "$base"
-md5sum "$tar" > "${this}.md5"
+create_bin_tgz
diff --git a/contrib/jenkins-build-osmo-hlr.sh b/contrib/jenkins-build-osmo-hlr.sh
index 6fbebab..8207451 100755
--- a/contrib/jenkins-build-osmo-hlr.sh
+++ b/contrib/jenkins-build-osmo-hlr.sh
@@ -1,69 +1,11 @@
 #!/bin/sh
 set -e -x
-
 base="$PWD"
-prefix="$base/inst-osmo-hlr"
-
-rm -f "$base/osmo-hlr*.tgz"
-
-git_url="git://git.osmocom.org"
-
-have_repo() {
-	repo="$1"
-	branch="${2-master}"
-
-	cd "$base"
-	if [ ! -d "$repo" ]; then
-		git clone "$git_url/$repo" -b "$branch" "$repo"
-	fi
-	cd "$repo"
-	rm -rf *
-	git fetch origin
-	git checkout .
-	git checkout "$branch"
-	git reset --hard origin/"$branch"
-	git rev-parse HEAD
-
-	cd "$base"
-}
-
-build_repo() {
-	dep="$1"
-	branch="${2-master}"
-
-	have_repo "$dep" "$branch"
-
-	cd "$dep"
-
-	echo "$(git rev-parse HEAD) $dep" >> "$prefix/osmo-hlr_git_hashes.txt"
-
-	config_opts=""
-
-	autoreconf -fi
-	./configure --prefix="$prefix" $config_opts
-	make -j8
-	make install
-}
-
-rm -rf "$prefix"
-mkdir -p "$prefix"
-
-export PKG_CONFIG_PATH="$prefix/lib/pkgconfig"
-export LD_LIBRARY_PATH="$prefix/lib"
+name="osmo-hlr"
+. "$(dirname "$0")/jenkins-build-common.sh"
 
 build_repo libosmocore
 build_repo libosmo-abis
 build_repo osmo-hlr
 
-# don't package documentation -- the libosmocore docs can be up to 16 Mb large,
-# a significant amount compared to the binaries
-rm -rf "$prefix/share/doc/libosmocore"
-
-# build the archive that is going to be copied to the tester
-rm "$base"/*.tgz "$base"/*.md5 || true
-cd "$prefix"
-this="osmo-hlr.build-${BUILD_NUMBER-$(date +%Y-%m-%d_%H_%M_%S)}"
-tar="${this}.tgz"
-tar czf "$base/$tar" *
-cd "$base"
-md5sum "$tar" > "${this}.md5"
+create_bin_tgz
diff --git a/contrib/jenkins-build-osmo-msc.sh b/contrib/jenkins-build-osmo-msc.sh
index f7808ff..53a23fe 100755
--- a/contrib/jenkins-build-osmo-msc.sh
+++ b/contrib/jenkins-build-osmo-msc.sh
@@ -1,62 +1,8 @@
 #!/bin/sh
 set -e -x
-
 base="$PWD"
-prefix="$base/inst-osmo-msc"
-
-rm -f "$base/osmo-msc*.tgz"
-
-git_url="git://git.osmocom.org"
-
-have_repo() {
-	repo="$1"
-	branch="${2-master}"
-
-	cd "$base"
-	if [ ! -d "$repo" ]; then
-		git clone "$git_url/$repo" -b "$branch" "$repo"
-	fi
-	cd "$repo"
-	rm -rf *
-	git fetch origin
-	git checkout .
-	git checkout "$branch"
-	git reset --hard origin/"$branch"
-	git rev-parse HEAD
-
-	cd "$base"
-}
-
-build_repo() {
-	dep="$1"
-	branch="${2-master}"
-
-	have_repo "$dep" "$branch"
-
-	cd "$dep"
-
-	echo "$(git rev-parse HEAD) $dep" >> "$prefix/osmo-msc_git_hashes.txt"
-
-	config_opts=""
-
-	case "$dep" in
-	'openbsc')
-		config_opts="$config_opts --enable-smpp --enable-osmo-bsc --enable-nat --enable-iu"
-		cd openbsc/
-	;;
-	esac
-
-	autoreconf -fi
-	./configure --prefix="$prefix" $config_opts
-	make -j8 || make  # libsmpp34 can't build in parallel
-	make install
-}
-
-rm -rf "$prefix"
-mkdir -p "$prefix"
-
-export PKG_CONFIG_PATH="$prefix/lib/pkgconfig"
-export LD_LIBRARY_PATH="$prefix/lib"
+name="osmo-msc"
+. "$(dirname "$0")/jenkins-build-common.sh"
 
 build_repo libosmocore
 build_repo libosmo-abis
@@ -66,17 +12,6 @@
 build_repo libosmo-sccp neels/aoip # TEMPORARY BRANCH
 build_repo libasn1c
 build_repo osmo-iuh neels/sigtran # TEMPORARY BRANCH
-build_repo openbsc aoip
+build_repo openbsc aoip --enable-smpp --enable-osmo-bsc --enable-nat --enable-iu
 
-# don't package documentation -- the libosmocore docs can be up to 16 Mb large,
-# a significant amount compared to the binaries
-rm -rf "$prefix/share/doc"
-
-# build the archive that is going to be copied to the tester
-rm "$base"/*.tgz "$base"/*.md5 || true
-cd "$prefix"
-this="osmo-msc.build-${BUILD_NUMBER-$(date +%Y-%m-%d_%H_%M_%S)}"
-tar="${this}.tgz"
-tar czf "$base/$tar" *
-cd "$base"
-md5sum "$tar" > "${this}.md5"
+create_bin_tgz
diff --git a/contrib/jenkins-build-osmo-nitb.sh b/contrib/jenkins-build-osmo-nitb.sh
index 86d787c..76fd6ba 100755
--- a/contrib/jenkins-build-osmo-nitb.sh
+++ b/contrib/jenkins-build-osmo-nitb.sh
@@ -1,82 +1,15 @@
 #!/bin/sh
 set -e -x
-
 base="$PWD"
-prefix="$base/inst-osmo-nitb"
+name="osmo-nitb"
+. "$(dirname "$0")/jenkins-build-common.sh"
 
-rm -f "$base/osmo-nitb*.tgz"
+build_repo libosmocore
+build_repo libosmo-abis
+build_repo libosmo-netif
+build_repo openggsn
+build_repo libsmpp34
+build_repo libosmo-sccp
+build_repo openbsc --enable-smpp --enable-osmo-bsc --enable-nat
 
-deps="
-libosmocore
-libosmo-abis
-libosmo-netif
-openggsn
-libsmpp34
-libosmo-sccp
-openbsc
-"
-
-have_repo() {
-	repo="$1"
-	cd "$base"
-	if [ ! -d "$repo" ]; then
-		git clone "git://git.osmocom.org/$repo" "$repo"
-	fi
-	cd "$repo"
-	git clean -dxf
-	git fetch origin
-	git reset --hard origin/master
-	git rev-parse HEAD
-	cd "$base"
-}
-
-rm -rf "$prefix"
-mkdir -p "$prefix"
-
-export PKG_CONFIG_PATH="$prefix/lib/pkgconfig"
-export LD_LIBRARY_PATH="$prefix/lib"
-
-for dep in $deps; do
-	set +x; echo "
-
-====================== $dep
-
-"; set -x
-
-	have_repo "$dep"
-	cd "$dep"
-	rm -rf *
-	git checkout .
-
-	echo "$(git rev-parse HEAD) $dep" >> "$prefix/osmo-nitb_git_hashes.txt"
-
-	config_opts=""
-
-	case "$dep" in
-	'openbsc')
-		config_opts="$config_opts --enable-smpp --enable-osmo-bsc --enable-nat"
-		cd openbsc/
-	;;
-	esac
-
-	autoreconf -fi
-	set +x;	echo; echo; set -x
-	./configure --prefix="$prefix" $config_opts
-	set +x;	echo; echo; set -x
-	make -j8 || make  # libsmpp34 can't build in parallel
-	set +x;	echo; echo; set -x
-	make install
-done
-
-# don't package documentation -- the libosmocore docs can be up to 16 Mb large,
-# a significant amount compared to the binaries
-rm -rf "$prefix/share/doc"
-
-# build the archive that is going to be copied to the tester
-rm "$base"/*.tgz "$base"/*.md5 || true
-cd "$prefix"
-this="osmo-nitb.build-${BUILD_NUMBER}"
-tar="${this}.tgz"
-tar czf "$base/$tar" *
-cd "$base"
-md5sum "$tar" > "${this}.md5"
+create_bin_tgz