Can't get CLion to actually use GCC compiler instead of Clang? - c++

Question

I've tried following all the help to change my compiler to use GCC instead of Clang (on macOS) as I would like to try to use __gnu_pbds::priority_queue instead of the STL version, and it still appears that CMake uses Clang. I've made a toolchain that looks like this:
and set it to be used in the CMake profile.
However, it appears CMake skips actually using the compiler - here is the CMake output:
/Applications/CLion.app/Contents/bin/cmake/mac/bin/cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/bin/gcc -DCMAKE_CXX_COMPILER=/usr/bin/g++ -G "CodeBlocks - Unix Makefiles" -S /Users/steve/CLionProjects/TestModernTimeStretch -B /Users/steve/CLionProjects/TestModernTimeStretch/cmake-build-release-gcc
-- The C compiler identification is AppleClang 13.1.6.13160021
-- The CXX compiler identification is AppleClang 13.1.6.13160021
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for stdbool.h
-- Looking for stdbool.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Checking processor clipping capabilities...
-- Performing Test CPU_CLIPS_POSITIVE
-- Performing Test CPU_CLIPS_POSITIVE - Failed
-- Performing Test CPU_CLIPS_NEGATIVE
-- Performing Test CPU_CLIPS_NEGATIVE - Failed
-- Checking processor clipping capabilities... none
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/steve/CLionProjects/TestModernTimeStretch/cmake-build-release-gcc