sources:
  "5.2.1":
    url: "https://downloads.sourceforge.net/project/giflib/giflib-5.2.1.tar.gz"
    sha256: "31da5562f44c5f15d63340a09a4fd62b48c45620cd302f77a6d9acf0077879bd"
patches:
  "5.2.1":
    - patch_file: "patches/0001-msvc-unistd.patch"
      base_path: "source_subfolder"
