.NET Core 中是否有等效于 DllImport 的 Linux？

Question

I am working on a .NET Core project. This should run on Linux without problems. However, I need to call a library that has been created with C++. Traditionally, C# developers do this with DllImport&DllExport .

However, I do not want to import or export dll's in a production environment. Over there it needs to run on Linux. Is there a Linux equivalent of DllImport/DllExport? On Linux, so files are used instead of dll files . I am not smart when it comes to low level things so I look for a quick solution and a clear example. Something like an "SoImport"?

Answer 1

You can use .so file also in DllImport.

[DllImport ("libc.so")]
private static extern int getpid ();

From the dlopen(3) man page, the necessary shared libraries needed by the program are searched for in the following order:

1. A colon-separated list of directories in the user's LD_LIBRARY_PATH environment variable. This is a frequently-used way to allow native shared libraries to be found by a CLI program.
2. The list of libraries cached in /etc/ld.so.cache. /etc/ld.so.cache is created by editing /etc/ld.so.conf and running ldconfig(8). Editing /etc/ld.so.conf is the preferred way to search additional directories, as opposed to using LD_LIBRARY_PATH, as this is more secure (it's more difficult to get a trojan library into /etc/ld.so.cache than it is to insert it into LD_LIBRARY_PATH).
3. /lib, followed by /usr/lib.

More details can be found here library handling

edit:

DllImport will fail if libc.so contains any unresolved symbols. Please verify with

ldd -r -d libc.so

and make sure no unresolved symbols are present there.