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What are the most important and known issues and limitations?

System requirements
  • CLion only runs on 64bit systems
CMake
  • CMakeCache changes should be applied via Reload CMake project button in the tool window.
Toolchain
C++
CLion supports the following C and C++ standards: C99, C11 partially, C++03, C++11, C++14 (all except constexpr), C++17 (initial support).
List of supported C++ language features can be found in our webhelp.
Performance and memory
  • On the large code bases (especially when using Boost) performance and memory issues during indexing and editing are possible.
  • Increasing memory may help to resolve performance problems. To check the memory usage, please, switch on the memory indicator in Preferences/Settings | Appearance & Behavior | Appearance | Show memory indicator.

(info) While reporting a performance problem, please, get a thread dump and a CPU snapshot and attach them to the report/ticket in tracker.

(info) To find IDE logs to attach to the problem use this link.

Debugger
  • Some issues are possible when debugging 32-bit projects with 64-bit GDB.

(info) To report debugger problem, please, configure and collect debug logs