1 files changed, 42 insertions, 1 deletions

diff --git a/meta-oe/classes/waf-samba.bbclass b/meta-oe/classes/waf-samba.bbclass
index a8b3b9529..45fbcc342 100644
--- a/meta-oe/classes/waf-samba.bbclass
+++ b/meta-oe/classes/waf-samba.bbclass
@@ -20,7 +20,38 @@ CONFIGUREOPTS = " --prefix=${prefix} \
                   --mandir=${mandir} \
                 "
 
+# Three methods for waf cross compile:
+# 1. answers:
+#    Only --cross-answers - try the cross-answers file, and if
+#    there's no corresponding answer, add to the file and mark
+#    the configure process as unfinished.
+# 2. exec:
+#    Only --cross-execute - get the answer from cross-execute,
+#    an emulator (qemu) is used to run cross-compiled binaries.
+# 3. both:
+#    (notes: not supported in lower version of some packages,
+#     please check buildtools/wafsamba/samba_cross.py in the
+#     package source)
+#    Try the cross-answers file first, and if there is no
+#    corresponding answer, use cross-execute to get an answer,
+#    and add that answer to the file.
+#
+# The first one is preferred since it may fail with 2 or 3 if
+# the target board is not suported by qemu, but we can use 2 or 3
+# to help generate the cross answer when adding new board support.
+CROSS_METHOD ?= "answer"
+
 do_configure() {
+
+    # Prepare the cross-answers file
+    CROSS_ANSWERS="${B}/cross-answers-${TARGET_ARCH}.txt"
+    if [ -e ${CROSS_ANSWERS} ]; then
+        rm -f ${CROSS_ANSWERS}
+    fi
+    echo 'Checking uname machine type: "${TARGET_ARCH}"' >> ${CROSS_ANSWERS}
+    echo 'Checking uname release type: "${OLDEST_KERNEL}"' >> ${CROSS_ANSWERS}
+    cat ${WAF_CROSS_ANSWERS_PATH}/cross-answers-${TARGET_ARCH}.txt >> ${CROSS_ANSWERS}
+
     qemu_binary="${@qemu_target_binary(d)}"
     if [ "${qemu_binary}" = "qemu-allarch" ]; then
         qemu_binary="qemuwrapper"
@@ -42,7 +73,17 @@ do_configure() {
     export STAGING_INCDIR=${STAGING_INCDIR}
     export PYTHONPATH=${STAGING_DIR_HOST}${PYTHON_SITEPACKAGES_DIR}
 
-    ./configure ${CONFIGUREOPTS} ${EXTRA_OECONF} --cross-compile --cross-execute="${CROSS_EXEC}"
+    CONFIG_CMD="./configure ${CONFIGUREOPTS} ${EXTRA_OECONF} --cross-compile"
+    if [ "${CROSS_METHOD}" = "answer" ]; then
+        ${CONFIG_CMD} --cross-answers="${CROSS_ANSWERS}"
+    elif [ "${CROSS_METHOD}" = "exec" ]; then
+        ${CONFIG_CMD} --cross-exec="${CROSS_EXEC}"
+    elif [ "${CROSS_METHOD}" = "both" ]; then
+        ${CONFIG_CMD} --cross-answers="${CROSS_ANSWERS}" --cross-exec="${CROSS_EXEC}"
+    else
+        echo "ERROR: ${CROSS_METHOD} is not valid for cross-compile!"
+        exit 1
+    fi
 }
 
 do_compile () {