Add GCC 12 to build configuration

.gitlab-ci.yml

@@ -37,6 +37,16 @@ build_ubuntu2204:
    tags:
       - ubuntu2204
 
+build_ubuntu2204-gcc12:
+   extends: .build_template
+   script:
+      - make realclean
+      - make all toolset=gcc-12
+      - make realclean
+      - make linuxbuild enable-tracing=true toolset=gcc-12
+   tags:
+      - ubuntu2204-gcc12
+
 build_vc191x:
    extends: .build_template
    tags: