我有一个需要共享库 libltdl.so.3 的程序。在 14.04 中运行此程序时，我遇到以下错误：
error while loading shared libraries: libltdl.so.3: cannot open shared object file: No such file or directory
我已经安装并更新了 libtool。在运行 atp-get install libltdl3 我得到以下输出
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libltdl3 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libltdl3' has no installation candidate
在运行时找到 libltdl.so 我得到
/usr/lib/x86_64-linux-gnu/libltdl.so
/usr/lib/x86_64-linux-gnu/libltdl.so.7
/usr/lib/x86_64-linux-gnu/libltdl.so.7.3.0
有人能告诉我如何获得 libltdl.so.3 吗？