new build mode for windows mingw cross compilation

scripts/build-in-docker.sh

@@ -16,6 +16,8 @@ packages=()
 targets="all check distcheck"
 commands=()
 arch=$((which dpkg > /dev/null 2> /dev/null && dpkg --print-architecture) || echo amd64)
+host=
+flags=()
 wait=0
 if test -e ./build-in-docker.conf; then
     # you can preconfigure the variables in file build-in-docker.conf
@@ -30,10 +32,12 @@ while test $# -gt 0; do
             echo "OPTIONS:"
             echo
             echo "  -h, --help            show this help"
-            echo "  -m, --mode <type>     mode: deb, rpm, default: ${mode}"
+            echo "  -m, --mode <type>     mode: deb, rpm, win, default: ${mode}"
             echo "  -i, --image <image>   use given docker image instead of ${img}"
             echo "  -a, --arch <arch>     build for given hardware architecture"
             echo "  -t, --targets targets specify build targets, default: ${targets}"
+            echo "  --host <target-arch>  host for cross compiling, e.g. i686-w64-mingw32"
+            echo "  -f, --flag <flag>     add flag to ./bootstrap.sh or ./configure"
             echo "  -r, --repo <url>      add given apt repository"
             echo "  -k, --key <url>       add public key from url"
             echo "  -e, --env <var>=<val> set environment variable in docker"
@@ -44,7 +48,9 @@ while test $# -gt 0; do
             echo
             echo "  The option -i must be after -m, because mode sets a new default image"
             echo "  The option -m must be after -t, because mode may be auto detected from targets"
+            echo "  The option -m must be after -h, because mode may set a host"
             echo "  If target is either deb or rpm, mode is set to the same value"
+            echo "  If target is win, host is set to i686-w64-mingw32"
             echo
             echo "  The options -r -k -e -d -p -c can be repeated several times."
             echo
@@ -79,6 +85,7 @@ while test $# -gt 0; do
                 (rpm|zypper) img="opensuse:latest";;
                 (yum) img="centos:latest";;
                 (dnf) img="fedora:latest";;
+                (win) img="ubuntu:latest"; host="${host:---host=i686-w64-mingw32}";;
                 (*)
                     echo "**** ERROR: unknown mode '$1', try --help" 1>&2
                     exit 1
@@ -91,7 +98,7 @@ while test $# -gt 0; do
         (-a|--arch) shift;
             arch="$1"
             ;;
-        (-t|--targets) shift
+        (-t|--targets) shift;
             targets="$1"
             if test "$1" = "deb" -o "$1" = "rpm"; then
                 # set mode to same value
@@ -99,6 +106,12 @@ while test $# -gt 0; do
                 continue
             fi
             ;;
+        (--host) shift;
+            host="--host=$1"
+            ;;
+        (-f|--flag) shift;
+            flags+=("$1")
+            ;;
         (-r|--repo) shift;
             repos+=("$1")
             ;;
@@ -275,5 +288,14 @@ EOF
         done
         docker exec ${DOCKER_ID} ./resolve-rpmbuilddeps.sh
         ;;
+    (win)
+        if [[ "${img}" =~ "ubuntu" ]]; then
+            docker exec ${DOCKER_ID} locale-gen ${LANG}
+            docker exec ${DOCKER_ID} update-locale LANG=${LANG}
+        fi
+        docker exec ${DOCKER_ID} apt-get update ${OPTIONS}
+        docker exec ${DOCKER_ID} apt-get install -y mingw-w64
+        docker exec ${DOCKER_ID} ./resolve-debbuilddeps.sh
+        ;;
 esac
-docker exec -u $(id -u):$(id -g) ${DOCKER_ID} ./bootstrap.sh -t "${targets}"
+docker exec -u $(id -u):$(id -g) ${DOCKER_ID} ./bootstrap.sh -t "${targets}" ${host} ${flags[@]}