abuild: depend on so: provides when available

and fall back to traditional so dependency tracing when not available

also sort the deps

abuild.in

@@ -889,9 +889,13 @@ trace_apk_deps() {
 			if ! list_has "$found" $self_provided; then
 				self_provided="$self_provided $found"
 			fi
+		else
+			if $APK info --quiet --installed "so:$i"; then
+				autodeps="$autodeps so:$i"
 			else
 				missing="$missing $i"
 			fi
+		fi
 	done
 
 	# find all packages that holds the so files
@@ -918,8 +922,8 @@ trace_apk_deps() {
 	fi
 	[ -z "$autodeps" ] && return 0
 	for i in $autodeps; do
-		echo "depend = $i" >> "$dir"/.PKGINFO
-	done
+		echo "depend = $i"
+	done | sort -u >> "$dir"/.PKGINFO
 }
 
 find_scanelf_paths() {