opencv: improve reproducibility

Remove the build host info to improve reproducibility, otherwise there
comes below detailed build host info when run below command on target.
  # python3 /usr/share/opencv4/samples/python/opencv_version.py --build
[snip]
  Extra modules:
    Location (extra):            /buildarea1/master-wr/build/User/customized_next/build/tmp/work/corei7-64-wrs-linux/opencv/4.3.0-r0/contrib/modules
[snip]

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/meta-oe/recipes-support/opencv/opencv_4.4.0.bb b/meta-oe/recipes-support/opencv/opencv_4.4.0.bb
index 372e15cd00..c83186de07 100644
--- a/meta-oe/recipes-support/opencv/opencv_4.4.0.bb
+++ b/meta-oe/recipes-support/opencv/opencv_4.4.0.bb
@@ -199,6 +199,13 @@ RDEPENDS_python3-opencv = "python3-core python3-numpy"
 
 RDEPENDS_${PN}-apps  = "bash"
 
+do_compile_prepend() {
+    # remove the build host info to improve reproducibility
+    if [ -f ${WORKDIR}/build/modules/core/version_string.inc ]; then
+        sed -i "s#${WORKDIR}#/workdir#g" ${WORKDIR}/build/modules/core/version_string.inc
+    fi
+}
+
 do_install_append() {
     # Move Python files into correct library folder (for multilib build)
     if [ "$libdir" != "/usr/lib" -a -d ${D}/usr/lib ]; then