CMAKE__COMPILER

From Get docs
Cmake/docs/3.21/variable/cmake lang compiler


CMAKE__COMPILER

The full path to the compiler for LANG.

This is the command that will be used as the <LANG> compiler. Once set, you can not change this variable.

Usage

This variable can be set by the user during the first time a build tree is configured.

If a non-full path value is supplied then CMake will resolve the full path of the compiler.

The variable could be set in a user supplied toolchain file or via -D on the command line.

Note

Options that are required to make the compiler work correctly can be included as items in a list; they can not be changed.


#set within user supplied toolchain file
set(CMAKE_C_COMPILER /full/path/to/qcc --arg1 --arg2)

or

$ cmake ... -DCMAKE_C_COMPILER='qcc;--arg1;--arg2'

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https://cmake.org/cmake/help/v3.21/variable/CMAKE_LANG_COMPILER.html