ci: disable GCC11 build, since it fails due to a GCC bug

.gitlab-ci.yml

@@ -222,34 +222,37 @@ focal-gcc10-relwithdebinfo-compile:
     - ./basalt_vio --help
     - ./basalt_vio_sim --help
 
-focal-gcc11-relwithdebinfo-compile:
-  <<: *prepare_docker_definition
-  image: vladyslavusenko/b_image_focal:latest
-  variables:
-    BUILD_TYPE: CiRelWithDebInfo
-    CC: gcc-11
-    CXX: g++-11
-  only:
-#    - master
-  stage: build
-  script:
-    - add-apt-repository ppa:ubuntu-toolchain-r/test -y
-    - apt-get update
-    - apt-get install -y g++-11
-    - mkdir build
-    - cd build
-    - cmake .. -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCXX_MARCH=${CXX_MARCH} -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
-    - make -j3
-    - ctest
-    # smoke test to see if all executables at least start up
-    - ./basalt_calibrate --help
-    - ./basalt_calibrate_imu --help
-    - ./basalt_mapper --help
-    - ./basalt_mapper_sim --help
-    - ./basalt_mapper_sim_naive --help
-    - ./basalt_opt_flow --help
-    - ./basalt_vio --help
-    - ./basalt_vio_sim --help
+# Compilation with GCC 11 is broken due to a bug that is fixed only in future relases 11.3 and 12
+# See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100438
+# See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99744#c15
+# focal-gcc11-relwithdebinfo-compile:
+#   <<: *prepare_docker_definition
+#   image: vladyslavusenko/b_image_focal:latest
+#   variables:
+#     BUILD_TYPE: CiRelWithDebInfo
+#     CC: gcc-11
+#     CXX: g++-11
+#   only:
+# #    - master
+#   stage: build
+#   script:
+#     - add-apt-repository ppa:ubuntu-toolchain-r/test -y
+#     - apt-get update
+#     - apt-get install -y g++-11
+#     - mkdir build
+#     - cd build
+#     - cmake .. -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCXX_MARCH=${CXX_MARCH} -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
+#     - make -j3
+#     - ctest
+#     # smoke test to see if all executables at least start up
+#     - ./basalt_calibrate --help
+#     - ./basalt_calibrate_imu --help
+#     - ./basalt_mapper --help
+#     - ./basalt_mapper_sim --help
+#     - ./basalt_mapper_sim_naive --help
+#     - ./basalt_opt_flow --help
+#     - ./basalt_vio --help
+#     - ./basalt_vio_sim --help
 
 catalina-relwithdebinfo-compile:
   <<: *compile_test_definition