buildsystem: fix Python native modules that are using build host ABI (PEP3149)

config/functions

@@ -1063,6 +1063,20 @@ python_remove_source() {
   fi
 }
 
+# arg1: directory to process recursively
+# strip incorrect build-host ABI from native Python3 modules (see PEP3149)
+python_fix_abi() {
+  local pymodule pyname
+
+  for pymodule in $(find ${1} -type f -name '*.cpython-*.so' 2>/dev/null); do
+    pyname=${pymodule##*/}
+    pyname=${pyname%.so} # strip extension
+    pyname=${pyname%.*}  # strip incorrect ABI
+    echo "python_fix_abi: Removing ABI from ${pymodule} -> ${pyname}.so"
+    mv ${pymodule} ${pymodule%/*}/${pyname}.so
+  done
+}
+
 ### KERNEL HELPERS ###
 kernel_path() {
   get_build_dir linux
@@ -1264,6 +1278,7 @@ install_addon_files() {
   install_addon_source "$1"
   install_addon_images "$1"
   create_addon_xml "$1"
+  python_fix_abi "$1"
 }
 
 install_driver_addon_files() {

scripts/build

@@ -474,6 +474,8 @@ if [ "${TARGET}" = "target" -o "${TARGET}" = "init" ]; then
         -exec rm -f {} \; 2>/dev/null || :
     find ${INSTALL} -type d -exec rmdir -p {} \; 2>/dev/null || :
 
+    python_fix_abi "${INSTALL}"
+
     if [ ! "${BUILD_WITH_DEBUG}" = "yes" ]; then
       ${STRIP} $(find ${INSTALL} \
         -type f -name "*.so*" \