3

我正在使用在 Ubuntu 12 x64 上运行的 Mono 2.10。现在我需要知道如何使用非托管代码。

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

而且，在下一步中，我有：

getpid();

我收到这个错误L

$ MONO_LOG_LEVEL="debug" MONO_LOG_MASK="dll" mono libc_test.exe
Mono: DllImport attempting to load: 'libc.so'.
Mono: DllImport loading library:     '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so'.
Mono: DllImport error loading library '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so: cannot open shared     object file: No such file or directory'.
Mono: DllImport loading library:     '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so'.
Mono: DllImport error loading library     '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so: cannot open shared     object file: No such file or directory'.
Mono: DllImport loading location: 'libc.so'.
Mono: DllImport error loading library: '/usr/lib/x86_64-linux-gnu/libc.so: invalid     ELF header'.
Mono: DllImport loading location: 'libc.so'.
Mono: DllImport error loading library: '/usr/lib/x86_64-linux-gnu/libc.so: invalid     ELF header'.
Mono: DllImport loading: 'libc.so'.
Mono: DllImport error loading library '/usr/lib/x86_64-linux-gnu/libc.so: invalid     ELF header'.
Mono: DllImport unable to load library '/usr/lib/x86_64-linux-gnu/libc.so: invalid     ELF header'.
Mono: DllImport attempting to load: 'libc.so'.
Mono: DllImport loading library:     '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so'.
Mono: DllImport error loading library     '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so: cannot open shared     object file: No such file or directory'.
Mono: DllImport loading library:     '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so'.
Mono: DllImport error loading library         '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so: cannot open shared     object file: No such file or directory'.
Mono: DllImport loading location: 'libc.so'.
Mono: DllImport error loading library: '/usr/lib/x86_64-linux-gnu/libc.so: invalid     ELF header'.
Mono: DllImport loading location: 'libc.so'.
Mono: DllImport error loading library: '/usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header'.
Mono: DllImport loading: 'libc.so'.
Mono: DllImport error loading library '/usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header'.
Mono: DllImport unable to load library '/usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header'.
Hello Linux!
Mono: DllImport attempting to load: 'libc.so'.
Mono: DllImport loading library: '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so'.
Mono: DllImport error loading library '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so: cannot open shared     object file: No such file or directory'.
Mono: DllImport loading library: '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so'.
Mono: DllImport error loading library '/home/ibaranov/Documents/MONO/libc_test/libc_test/bin/Debug/libc.so: cannot open shared object file: No such file or directory'.
Mono: DllImport loading location: 'libc.so'.
Mono: DllImport error loading library: '/usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header'.
Mono: DllImport loading location: 'libc.so'.
Mono: DllImport error loading library: '/usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header'.
Mono: DllImport loading: 'libc.so'.
Mono: DllImport error loading library '/usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header'.
Mono: DllImport unable to load library '/usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header'.

Unhandled Exception: System.DllNotFoundException: libc.so
  at (wrapper managed-to-native) libc_test.LibC:getpid ()
  at libc_test.MainClass.Main (System.String[] args) [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.DllNotFoundException: libc.so
  at (wrapper managed-to-native) libc_test.LibC:getpid ()
  at libc_test.MainClass.Main (System.String[] args) [0x00000] in <filename unknown>:0

我一直在尝试解决这个问题很长一段时间，但我尝试过的任何东西都没有帮助我。我用：

 dlopen("libc.so", RTLD_NOW);

也许我需要为 x64 编译的 libc.so？

4

3 回答 3

6

它应该是

[DllImport("libc.so.6")]

要不就

[DllImport("libc")]

"libc" 是 /etc/mono/config 的别名，在 GNU/Linux 系统上： ... <dllmap dll="libc" target="libc.so.6" os="!windows"\> ...

于 2014-06-13T23:17:05.093 回答
4

在 x64 位 ubuntu 12 中解决此问题

cd /lib/x86_64-linux-gnu
ln -s libc.so.6 libc.so
于 2013-01-16T14:21:46.590 回答
0

为了在 Raspberry Pi 上使用从 tarball 编译的 mono 4.0.2 解决 Raspbian，我这样做了

sudo cp /lib/arm-linux-gnueabihf/libc.so.6 /lib/libc

/lib是默认搜索文件夹之一

于 2015-06-18T12:02:39.070 回答