# clang-tidy / g++ "C++ Standard" command line parameter incompatibilites
**URL:** https://discourse.cmake.org/t/clang-tidy-g-c-standard-command-line-parameter-incompatibilites/8526
**Category:** Usage
**Created:** [July 15, 2023, 5:36pm UTC](https://discourse.cmake.org/t/clang-tidy-g-c-standard-command-line-parameter-incompatibilites/8526 "2023-07-15T17:36:44Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@infohoschie](https://discourse.cmake.org/u/infohoschie)
#### Post date: [July 15, 2023, 5:36pm UTC](https://discourse.cmake.org/t/clang-tidy-g-c-standard-command-line-parameter-incompatibilites/8526/1 "2023-07-15T17:36:44Z")
I’m using clang-tidy for static analysis by defining CMAKE\_CXX\_CLANG\_TIDY to the system installed clang-tidy executable.
I want to set the C++ Standard to C++23.
When using g++ (Version 13.1) cmake sets the command line parameter to “-std=gnu++23”.
Unfortunately the installed clang-tidy (Version 16.0.6) executable doesn’t recognize this parameter and fails with a “clang-diagnostic-error” - it expects the parameter set to “gnu++2b”.
When using clang as compiler CMake sets the parameter to the expected value and works together with clang-tidy.
Do you now a way to modify the command line for g++ / clang-tidy to work together?
Regards Thomas
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### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [July 18, 2023, 12:12am UTC](https://discourse.cmake.org/t/clang-tidy-g-c-standard-command-line-parameter-incompatibilites/8526/2 "2023-07-18T00:12:14Z")
There’s no mechanism that CMake provides to translate these kinds of things. The paired tool just needs to agree on what flags mean. For bleeding edge things, this usually means using `clang` with `clang-tidy` as the “what flag X means” usually takes time for the two compilers to agree on (here, when each says “yeah, C++23 is supported enough to rename the `-std=` flag value”).