# Intellisense disabled in new C++ extension **URL:** \ **Category:** Bug Reports\ **Created:** [May 29, 2025, 7:04pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437 "2025-05-29T19:04:36Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Steve-Lord](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/steve-lord/32/18286_2.png) [@Steve-Lord](https://forum.cursor.com/u/Steve-Lord)\ **Post date:** [May 29, 2025, 7:04pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/1 "2025-05-29T19:04:36Z")
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. ---
**Author:** ![Steve-Lord](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/steve-lord/32/18286_2.png) [@Steve-Lord](https://forum.cursor.com/u/Steve-Lord)\ **Post date:** [May 29, 2025, 7:14pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/3 "2025-05-29T19:14:23Z")
Ah, I see from yesterday this may relate to getting clangd setup, trying to work that one out, our project compilation is somewhat involved. ---
**Author:** ![ravirahman](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/ravirahman/32/20386_2.png) [@ravirahman](https://forum.cursor.com/u/ravirahman)\ **Post date:** [May 29, 2025, 7:22pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/5 "2025-05-29T19:22:33Z")
Hi! These logs are expected, we use clangd to provide lsp support. Intellisense for c++ is not supported within Cursor. ---
**Author:** ![Steve-Lord](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/steve-lord/32/18286_2.png) [@Steve-Lord](https://forum.cursor.com/u/Steve-Lord)\ **Post date:** [May 29, 2025, 11:40pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/6 "2025-05-29T23:40:39Z")
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. ---
**Author:** ![brianwatersmanna](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/brianwatersmanna/32/64540_2.png) [@brianwatersmanna](https://forum.cursor.com/u/brianwatersmanna)\ **Post date:** [June 18, 2025, 1:44pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/8 "2025-06-18T13:44:26Z")
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. ---
**Author:** ![Steve-Lord](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/steve-lord/32/18286_2.png) [@Steve-Lord](https://forum.cursor.com/u/Steve-Lord)\ **Post date:** [June 18, 2025, 2:24pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/10 "2025-06-18T14:24:37Z")
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](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/](https://apt.llvm.org/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 ---
**Author:** ![brianwatersmanna](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/brianwatersmanna/32/64540_2.png) [@brianwatersmanna](https://forum.cursor.com/u/brianwatersmanna)\ **Post date:** [June 18, 2025, 2:44pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/12 "2025-06-18T14:44:58Z")
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. ---
**Author:** ![system](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/system/32/99069_2.png) [@system](https://forum.cursor.com/u/system)\ **Post date:** [July 18, 2025, 2:45pm UTC](https://forum.cursor.com/t/intellisense-disabled-in-new-c-extension/98437/14 "2025-07-18T14:45:19Z")
Closed on July 18, 2025, 2:45pm UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.