CLion-CMake-profiles.xml

  <component name="CMakeSettings" AUTO_RELOAD="true">
    <configurations>
      <configuration PROFILE_NAME="Debug-g++-9-brew" CONFIG_NAME="Debug" TOOLCHAIN_NAME="g++-9-brew" GENERATION_DIR="cmake-build-spaces/cmake-build-debug-gcc9-brew" />
      <configuration PROFILE_NAME="Debug-g++-9-brew Ninja Unity" CONFIG_NAME="Debug" TOOLCHAIN_NAME="g++-9-brew" GENERATION_OPTIONS="-G Ninja -DCMAKE_UNITY_BUILD=yes" GENERATION_DIR="cmake-build-spaces/cmake-build-debug-gcc9-brew-ninja-unity" />
      <configuration PROFILE_NAME="Debug-clang++-mp-9.0" CONFIG_NAME="Debug" TOOLCHAIN_NAME="clang++-mp-9.0" GENERATION_DIR="cmake-build-spaces/cmake-build-debug-clang-mp-90" />
      <configuration PROFILE_NAME="Debug-clang++-mp-9.0 Ninja Unity" CONFIG_NAME="Debug" TOOLCHAIN_NAME="clang++-mp-9.0" GENERATION_OPTIONS="-G Ninja -DCMAKE_UNITY_BUILD=yes" GENERATION_DIR="cmake-build-spaces/cmake-build-debug-clang-mp-90-ninja-unity" />
      <configuration PROFILE_NAME="Debug-xcode" CONFIG_NAME="Debug" GENERATION_DIR="cmake-build-spaces/cmake-build-debug-xcode" />
      <configuration PROFILE_NAME="Debug-xcode Ninja Unity" CONFIG_NAME="Debug" TOOLCHAIN_NAME="Default" GENERATION_OPTIONS="-G Ninja -DCMAKE_UNITY_BUILD=yes" GENERATION_DIR="cmake-build-spaces/cmake-build-debug-xcode-ninja-unity" />
      <configuration PROFILE_NAME="Release-xcode" CONFIG_NAME="Release" GENERATION_DIR="cmake-build-spaces/cmake-build-release-xcode" />
      <configuration PROFILE_NAME="Release-xcode Ninja Unity" CONFIG_NAME="Release" GENERATION_OPTIONS="-G Ninja -DCMAKE_UNITY_BUILD=yes" GENERATION_DIR="cmake-build-spaces/cmake-build-release-xcode-ninja-unity" />
    </configurations>
  </component>

My CLion preferences for putting all my chosen builds into a cmake-build-spaces sub-directory.

As well as being able to collapse down all the builds, it has another nice bonus... in that you only have to "Mark as Excluded" the top level directory, and then all the build configs inherit that automatically... Doing it for all the separate folders was getting very old.

Important if you mimic this, make sure to remove special characters from the folder names in GENERATION_DIR, like space, +, . - and probably lower-case the names as well.