Intellisense disabled in new C++ extension

[Steve-Lord]

I installed the new in-house c++ extension. I am running in a dev container running linux on an arm64 Mac. It looks like maybe some of the executables are not present for this platform:

From the c/c++ output log:

Warning: Expected file /root/.cursor-server/extensions/anysphere.cpptools-2.0.0-linux-arm64/bin/cpptools is missing.

Warning: Expected file /root/.cursor-server/extensions/anysphere.cpptools-2.0.0-linux-arm64/bin/cpptools-srv is missing.

Warning: Expected file /root/.cursor-server/extensions/anysphere.cpptools-2.0.0-linux-arm64/bin/cpptools-wordexp is missing.

intelliSenseEngine is disabled

In that directory I see:

-rw-r–r-- 1 root root 582 May 29 18:33 common.json
-rw-r–r-- 1 root root 299 May 29 18:33 linux.clang.arm.json
-rw-r–r-- 1 root root 308 May 29 18:33 linux.clang.arm64.json
-rw-r–r-- 1 root root 298 May 29 18:33 linux.clang.x64.json
-rw-r–r-- 1 root root 289 May 29 18:33 linux.clang.x86.json
-rw-r–r-- 1 root root 266 May 29 18:33 linux.gcc.arm.json
-rw-r–r-- 1 root root 275 May 29 18:33 linux.gcc.arm64.json
-rw-r–r-- 1 root root 267 May 29 18:33 linux.gcc.x64.json
-rw-r–r-- 1 root root 256 May 29 18:33 linux.gcc.x86.json
-rw-r–r-- 1 root root 282 May 29 18:33 macos.clang.arm.json
-rw-r–r-- 1 root root 291 May 29 18:33 macos.clang.arm64.json
-rw-r–r-- 1 root root 281 May 29 18:33 macos.clang.x64.json
-rw-r–r-- 1 root root 272 May 29 18:33 macos.clang.x86.json
-rw-r–r-- 1 root root 249 May 29 18:33 macos.gcc.arm.json
-rw-r–r-- 1 root root 258 May 29 18:33 macos.gcc.arm64.json
-rw-r–r-- 1 root root 248 May 29 18:33 macos.gcc.x64.json
-rw-r–r-- 1 root root 239 May 29 18:33 macos.gcc.x86.json
drwxr-xr-x 15 root root 4096 May 29 18:33 messages
-rw-r–r-- 1 root root 87 May 29 18:33 windows.clang.arm.json
-rw-r–r-- 1 root root 87 May 29 18:33 windows.clang.arm64.json
-rw-r–r-- 1 root root 87 May 29 18:33 windows.clang.x64.json
-rw-r–r-- 1 root root 87 May 29 18:33 windows.clang.x86.json
-rw-r–r-- 1 root root 53 May 29 18:33 windows.gcc.arm.json
-rw-r–r-- 1 root root 55 May 29 18:33 windows.gcc.arm64.json
-rw-r–r-- 1 root root 53 May 29 18:33 windows.gcc.x64.json
-rw-r–r-- 1 root root 53 May 29 18:33 windows.gcc.x86.json
-rw-r–r-- 1 root root 266 May 29 18:33 windows.msvc.arm.json
-rw-r–r-- 1 root root 291 May 29 18:33 windows.msvc.arm64.json
-rw-r–r-- 1 root root 314 May 29 18:33 windows.msvc.x64.json
-rw-r–r-- 1 root root 292 May 29 18:33 windows.msvc.x86.json

During the install I got popups about installing clangd, which is now in the container and appears to be functioning.

[Steve-Lord]

Ah, I see from yesterday this may relate to getting clangd setup, trying to work that one out, our project compilation is somewhat involved.

[ravirahman]

Hi! These logs are expected, we use clangd to provide lsp support. Intellisense for c++ is not supported within Cursor.

[Steve-Lord]

Got it all working, bit of a research exercise to get clangd doing its thing though. One colleague had it offer to download clangd and I had to do it manually, not sure why.

[brianwatersmanna]

Can you share what you had to do to get clangd working please? It’s detecting my compile_commands.json, but not linking my ADTs correctly.

[Steve-Lord]

Our dev containers are Ubuntu 22, the version of clangd there is old, putting this in the docker file for the container got us to a recent version:

RUN curl -fsSL https://apt.llvm.org/llvm-snapshot.gpg.key |
gpg --dearmor | sudo tee /usr/share/keyrings/llvm-archive-keyring.gpg > /dev/null
&& echo “deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] Index of /jammy/ llvm-toolchain-jammy-19 main” |
sudo tee /etc/apt/sources.list.d/llvm.list > /dev/null
&& apt-get update
&& apt-get install -y clangd-19 clang-format-19
&& apt-get clean
&& update-alternatives --install /usr/bin/clangd clangd /usr/bin/clangd-19 100
&& update-alternatives --set clangd /usr/bin/clangd-19
&& update-alternatives --install /usr/bin/clang-format clang-format /usr/bin/clang-format-19 100
&& update-alternatives --set clang-format /usr/bin/clang-format-19

I would have to guess what an ADT is, abstract data type? That would sound like a clangd is not finding all the definitions in your project, which could relate to the -I directives in the json output.

Steve

[brianwatersmanna]

Ah, ok. This sounds more like a clangd problem then than a Cursor devcontainer problem. It’s finding my library files fine, it’s not linking to classes I’ve defined myself locally however. Thanks for that, will keep digging.