Restore POSIX compatibility of the configure script

find is not a POSIX tool

Author: kit-ty-kate

configure

@@ -702,12 +702,13 @@ for lib in $generated_META $lbytes; do
     echo "Configuration for $lib written to site-lib-src/$lib/META"
 done
 
-# create META from META.in in POSIX-compatible & safe way
-# see: https://www.shellcheck.net/wiki/SC2044
-meta_subst="sed -e 's/@VERSION@/$version/g' \
-	-e 's/@REQUIRES@/${req_bytes}/g' \
-	\"\$1\" > \"\${1%.in}\""
-find src -name 'META.in' -type f -exec sh -c "$meta_subst" sh {} \;
+for part in src/*; do
+  if [ -f "$part/META.in" ]; then
+    sed -e "s/@VERSION@/$version/g" \
+        -e "s/@REQUIRES@/${req_bytes}/g" \
+        "$part/META.in" > "$part/META"
+  fi
+done
 
 ######################################################################