[BUG] Cannot find mono.linux-x86_64 on Nixos

[ztlevi]

Hi,

I'm trying to setup cpp debug on Nixos. dap-cpptools is loaded and I did M-x dap-cpptools-setup.

But I get in the stderr buffer.

/home/ztlevi/.config/emacs/.local/etc/dap-extension/vscode/cpptools/extension/debugAdapters/OpenDebugAD7: line 39: /home/ztlevi/.config/emacs/.local/etc/dap-extension/vscode/cpptools/extension/debugAdapters/mono.linux-x86_64: No such file or directory

I have lldb, gdb, and mono installed in the system.

cpptools/extension/debugAdapters on  develop [⇡]
✖ which gdb
/etc/profiles/per-user/ztlevi/bin/gdb

cpptools/extension/debugAdapters on  develop [⇡]
➜ which lldb
/etc/profiles/per-user/ztlevi/bin/lldb

cpptools/extension/debugAdapters on  develop [⇡]
➜ mono --version
Mono JIT compiler version 6.12.0.122 (tarball Tue Nov 23 07:05:07 UTC 2021)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       altstack
	Notifications: epoll
	Architecture:  amd64
	Disabled:      none
	Misc:          softdebug
	Interpreter:   yes
	LLVM:          supported, not enabled.
	Suspend:       hybrid
	GC:            sgen (concurrent by default)

The error looks weird because the file does exist. I even try to change the ownership to 755 but still not working.

cpptools/extension/debugAdapters on  develop [⇡]
➜ pwd
/home/ztlevi/.config/emacs/.local/etc/dap-extension/vscode/cpptools/extension/debugAdapters

cpptools/extension/debugAdapters on  develop [⇡]
➜ ll
Permissions Size User   Group Date Modified Name
drwxr-xr-x     - ztlevi users  2 Jan 16:50  bin
drwxr-xr-x     - ztlevi users  2 Jan 16:50  framework
.rwxr-xr-x  4.3M ztlevi users 15 Jul  2020  mono.linux-x86_64
.rwxr-xr-x  1.1k ztlevi users  2 Jan 16:57  OpenDebugAD7

The debug template I use is this. I also tried MIMode as gdb but no luck.

    {
      "name": "Sample1 Unittest Debug",
      "type": "cppdbg",
      "request": "launch",
      "program": "${workspaceFolder}/build/tests/sample1_unittest",
      "args": [],
      "stopAtEntry": false,
      "cwd": "${workspaceFolder}",
      "environment": [],
      "externalConsole": false,
      "MIMode": "lldb",
      // For emacs dap-mode https://github.com/emacs-lsp/dap-mode/blob/eda32995c3208bb41879b9302afb0f32d3b7adf0/docs/page/features.md#compiling-the-project-before-debugging
      "dap-compilation": "cmake --build build --config Debug --target all -j 14 --",
      // For vscode tasks
      "preLaunchTask": "cmake build"
    },

I think the error can be easily reproduced. Please take a look and see if you have any clue.

Thank you!

[yorodm]

Hi there, I'm having the same issue and can confirm that ldd mono.linux-x86_64 shows that everything is OK with the shared libraries

ldd mono.linux-x86_64
        linux-vdso.so.1 (0x00007fff4c5d7000)
        libm.so.6 => /nix/store/rir9pf0kz1mb84x5bd3yr0fx415yy423-glibc-2.33-123/lib/libm.so.6 (0x00007f2ef1c83000)
        librt.so.1 => /nix/store/rir9pf0kz1mb84x5bd3yr0fx415yy423-glibc-2.33-123/lib/librt.so.1 (0x00007f2ef1c78000)
        libdl.so.2 => /nix/store/rir9pf0kz1mb84x5bd3yr0fx415yy423-glibc-2.33-123/lib/libdl.so.2 (0x00007f2ef1c73000)
        libpthread.so.0 => /nix/store/rir9pf0kz1mb84x5bd3yr0fx415yy423-glibc-2.33-123/lib/libpthread.so.0 (0x00007f2ef1c53000)
        libgcc_s.so.1 => /nix/store/rir9pf0kz1mb84x5bd3yr0fx415yy423-glibc-2.33-123/lib/libgcc_s.so.1 (0x00007f2ef1c39000)
        libc.so.6 => /nix/store/rir9pf0kz1mb84x5bd3yr0fx415yy423-glibc-2.33-123/lib/libc.so.6 (0x00007f2ef1a64000)
        /lib64/ld-linux-x86-64.so.2 => /nix/store/rir9pf0kz1mb84x5bd3yr0fx415yy423-glibc-2.33-123/lib64/ld-linux-x86-64.so.2 (0x00007f2ef1dc6000)