Q: How to fix 'libclang.so not found' error in irony-mode?

Ensure libclang is installed in a standard location or add it to your LD_LIBRARY_PATH. For non-standard installs, build irony-server with CMake's -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=ON flag or use install_name_tool on macOS.

Q: Does irony-mode support modern C++ standards like C++17 or C++20?

Yes, since it leverages libclang, it supports the latest C++ features as long as your libclang version is up-to-date and compiler flags are passed correctly via the compilation database.

Q: How to integrate irony-mode with company-mode for autocompletion?

Install the company-irony package, and it will automatically register as a backend. Enable company-mode and irony-mode in your C/C++ buffers, and completions should appear without additional configuration.

Question 1

How to set up irony-mode with CMake on Linux?

Accepted Answer

Install irony-mode via MELPA, then run CMake with -DCMAKE_EXPORT_COMPILE_COMMANDS=ON to generate compile_commands.json. Add irony-cdb-autosetup-compile-options to your hooks for automatic flag detection and accurate parsing.

Question 2

Irony-mode vs lsp-mode for C++ in Emacs, which should I use?

Accepted Answer

Irony-mode uses libclang directly for tight Emacs integration and accuracy, while lsp-mode relies on language servers like clangd for broader features. Choose irony-mode for deep Emacs synergy or lsp-mode for a more standardized, server-based approach.

Question 3

Why is irony-mode completion slow on my system?

Accepted Answer

This is often due to old libclang versions (<3.2), where optimizations are disabled. Upgrade libclang to a newer version and ensure your compilation database is correctly configured to improve parsing speed.

Question 4

How to fix 'libclang.so not found' error in irony-mode?

Accepted Answer

Ensure libclang is installed in a standard location or add it to your LD_LIBRARY_PATH. For non-standard installs, build irony-server with CMake's -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=ON flag or use install_name_tool on macOS.

Question 5

Does irony-mode support modern C++ standards like C++17 or C++20?

Accepted Answer

Yes, since it leverages libclang, it supports the latest C++ features as long as your libclang version is up-to-date and compiler flags are passed correctly via the compilation database.

Question 6

How to integrate irony-mode with company-mode for autocompletion?

Accepted Answer

Install the company-irony package, and it will automatically register as a backend. Enable company-mode and irony-mode in your C/C++ buffers, and completions should appear without additional configuration.

Irony-mode

What is Irony-mode?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions