Ubuntu 22中缺失libdl.so导致程序崩溃的解决方法

问题现象 #

运行myapp时出现以下崩溃报错：

user@machine:~$ myapp
Unhandled exception. System.DllNotFoundException: Unable to load shared library 'libdl.so' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: liblibdl.so: cannot open shared object file: No such file or directory
   at Python.Runtime.Runtime.dlopen(String fileName, Int32 flags)
   at Python.Runtime.Runtime.<.cctor>g__OnResolveDllImport|46_0(String libraryName, Assembly assembly, Nullable`1 searchPath) in /tmp/tmp9xcr_e_u/pythonnet/2.5.1+ahl1/ws/src/src/runtime/runtime.cs:line 180
   at System.Runtime.InteropServices.NativeLibrary.LoadLibraryCallbackStub(String libraryName, Assembly assembly, Boolean hasDllImportSearchPathFlags, UInt32 dllImportSearchPathFlags)
   at Python.Runtime.Runtime.Py_IsInitialized()
   at Python.Runtime.Runtime.Initialize(Boolean initSigs) in /tmp/tmp9xcr_e_u/pythonnet/2.5.1+ahl1/ws/src/src/runtime/runtime.cs:line 195
   at Python.Runtime.PythonEngine.Initialize(IEnumerable`1 args, Boolean setSysArgv, Boolean initSigs) in /tmp/tmp9xcr_e_u/pythonnet/2.5.1+ahl1/ws/src/src/runtime/pythonengine.cs:line 179
   at Python.Runtime.PythonEngine.Initialize(Boolean setSysArgv, Boolean initSigs) in /tmp/tmp9xcr_e_u/pythonnet/2.5.1+ahl1/ws/src/src/runtime/pythonengine.cs:line 156
   at Python.Runtime.PythonEngine.InitExt() in /tmp/tmp9xcr_e_u/pythonnet/2.5.1+ahl1/ws/src/src/runtime/pythonengine.cs:line 266
Aborted (core dumped)

解决方案 #

在Ubuntu 22.04中，libdl.so是GNU C库（glibc）的组成部分，默认以带版本号的libdl.so.2形式存在，以下是两种常见解决方式：

1. 安装32位兼容库（适用于64位系统运行32位程序场景） #

如果你的myapp是32位程序，需要安装32位glibc库：

sudo apt update && sudo apt install libc6-i386

2. 创建软链接（适用于64位程序场景） #

64位系统中，libdl.so.2默认位于/lib/x86_64-linux-gnu/目录下，直接创建指向它的软链接即可：

sudo ln -s /lib/x86_64-linux-gnu/libdl.so.2 /lib/x86_64-linux-gnu/libdl.so

验证修复效果 #

运行以下命令确认libdl.so已可被系统识别：

ldconfig -p | grep libdl

输出应包含libdl.so和libdl.so.2的条目。

内容的提问来源于stack exchange，提问作者user5994461