Optimize recursive DLL resolution: scan only newly added DLLs

tools/chatgui/build.sh

@@ -42,11 +42,10 @@ if [ -x "$WINDEPLOYQT" ]; then
 else
     log "  WARN: $WINDEPLOYQT not found (install: pacman -S mingw-w64-ucrt-x86_64-qt5-tools)"
     log "  Resolving dependencies recursively..."
-    changed=1
-    while [ $changed -eq 1 ]; do
-        changed=0
-        for src in "$BUILD_DIR"/chatgui.exe "$BUILD_DIR"/*.dll; do
-            [ -f "$src" ] || continue
+    todo="$BUILD_DIR/chatgui.exe"
+    while [ -n "$todo" ]; do
+        next_todo=""
+        for src in $todo; do
             for dep in $(objdump -p "$src" 2>/dev/null | grep "DLL Name:" | awk '{print $3}'); do
                 case "$dep" in
                     KERNEL32.dll|msvcrt.dll|USER32.dll|GDI32.dll|SHELL32.dll|ADVAPI32.dll|\
@@ -56,12 +55,13 @@ else
                 esac
                 [ -f "$BUILD_DIR/$dep" ] && continue
                 if cp "/ucrt64/bin/$dep" "$BUILD_DIR/" 2>/dev/null; then
-                    log "  OK: $dep"; changed=1
+                    log "  OK: $dep"; next_todo="$next_todo $BUILD_DIR/$dep"
                 elif cp "/mingw64/bin/$dep" "$BUILD_DIR/" 2>/dev/null; then
-                    log "  OK: $dep (mingw64)"; changed=1
+                    log "  OK: $dep (mingw64)"; next_todo="$next_todo $BUILD_DIR/$dep"
                 fi
             done
         done
+        todo="$next_todo"
     done
 fi
 cp "$SRC_DIR/rlottie_build/librlottie.dll" "$BUILD_DIR/" 2>/dev/null && log "  OK: librlottie.dll" || log "  WARN: librlottie.dll not found"