That project is based on STM32 MCU Support Package and provide basic environment setup of STM32L011xx based on cmake.
cmake >= 3.0
GCC toolchain with newlib (optional).
TOOLCHAIN_PREFIX - where toolchain is located, default: /usr
TARGET_TRIPLET - toolchain target triplet, default: arm-none-eabi
Open cmake file as a project in clion. Configure OpenOCD in clion.
You can use this cmake file to setup environment for other stm32 controllers by downloading corresponding STM32 MCU Support Package and replacing it with current files.