* 🔧 add more GCC warning flags
* 👷 use GCC image for GCC test
* 👷 use GCC image for GCC test
* 👷 use GCC image for GCC test
* 👷 use GCC image for GCC test
* 👷 use GCC image for GCC test
* 👷 use GCC image for GCC test
* 👷 use GCC image for GCC test
* 👷 use GCC image for GCC test
* 🔧 adjust flags
* 👷 adjust jobs
* 👷 adjust jobs