cmake build_error ai_generated true

CMake Error: No CMAKE_CXX_COMPILER could be found

ID: cmake/no-cxx-compiler-found

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92%Fix Rate

90%Confidence

3Evidence

2023-01-01First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
3	active	—	—	—

CMake cannot find a C/C++ compiler. Toolchain not installed or not in PATH.

generic

95% success Install the compiler toolchain
```
sudo apt install build-essential
```
Sources: https://cmake.org/cmake/help/latest/
85% success Use CMake toolchain file for cross-compilation
```
cmake -DCMAKE_TOOLCHAIN_FILE=arm-toolchain.cmake ..
```

88% success Specify compiler explicitly

cmake -DCMAKE_CXX_COMPILER=/usr/bin/g++-12 ..

Common approaches that don't work:

Set CMAKE_CXX_COMPILER to compiler include directory 82% fail
Must point to compiler EXECUTABLE (e.g., /usr/bin/g++), not a directory
Install cmake assuming it includes a compiler 88% fail
CMake is a build system generator, not a compiler. You need gcc/g++ separately.