abuild: add support for option 'ldpath-recursive'

This option will enable recursive search of shared-objects, which is
disable by default.

abuild.in

@@ -942,15 +942,19 @@ find_scanelf_paths() {
 
 scan_shared_objects() {
 	local name="$1" controldir="$2" datadir="$3"
+	local opt=
 
 	# allow spaces in paths
 	IFS=:
 	set -- $(find_scanelf_paths "$controldir" "$datadir")
 	unset IFS
 
+	if options_has "ldpath-recursive"; then
+		opt="--recursive"
+	fi
 	msg "Scanning shared objects"
 	# lets tell all the .so files this package provides in .provides-so
-	scanelf --nobanner --soname "$@" | while read etype soname file; do
+	scanelf --nobanner --soname $opt "$@" | while read etype soname file; do
 		# if soname field is missing, soname will be the filepath
 		sover=0
 		if [ -z "$file" ]; then