build: gcc-11 support removed because of ICEs

.github/workflows/ci-conan.yml

@@ -54,18 +54,6 @@ jobs:
           #     compiler: { type: MSVC, version: 193, cc: "", cxx: "" },
           #     conan-config: "",
           #   }
-          - {
-              name: "GCC-11",
-              os: ubuntu-22.04,
-              compiler:
-                {
-                  type: GCC,
-                  version: 11,
-                  cc: "gcc-11",
-                  cxx: "g++-11",
-                },
-              conan-config: "",
-            }
           - {
               name: "GCC-12",
               os: ubuntu-22.04,

.github/workflows/ci-test-package-cmake.yml

@@ -53,17 +53,6 @@ jobs:
           #     os: windows-2022,
           #     compiler: { type: MSVC, version: 193, cc: "", cxx: "" },
           #   }
-          - {
-              name: "GCC-11",
-              os: ubuntu-22.04,
-              compiler:
-                {
-                  type: GCC,
-                  version: 11,
-                  cc: "gcc-11",
-                  cxx: "g++-11",
-                },
-            }
           - {
               name: "GCC-12",
               os: ubuntu-22.04,

docs/getting_started/installation_and_usage.md

@@ -14,9 +14,7 @@
 
     As of today, the library compiles fine on the following compilers (or newer):
 
-    - gcc-11
+    - gcc-12
-        - please note that we observed some ICEs on gcc-11
-        - no problems with gcc-12.2+
     - clang-16
     - apple-clang-15
 

docs/index.md

@@ -27,9 +27,7 @@ The library source code is hosted on [GitHub](https://github.com/mpusz/mp-units)
 
     As of today, the library compiles fine on the following compilers (or newer):
 
-    - gcc-11
+    - gcc-12
-        - please note that we observed some ICEs on gcc-11
-        - no problems with gcc-12.2+
     - clang-16
     - apple-clang-15