#2286: Remove gcc-8 references

ci/docker/ubuntu-gnu-docs.dockerfile

@@ -3,7 +3,7 @@ ARG ubuntu=22.04
 FROM ${arch}/ubuntu:${ubuntu} as base
 
 ARG proxy=""
-ARG compiler=gcc-8
+ARG compiler=gcc-9
 ARG token
 
 ENV https_proxy=${proxy} \

docker-compose.yml

@@ -10,7 +10,7 @@
 # Variables:
 #   ARCH={amd64, arm64v8, ...}
 #   COMPILER_TYPE={gnu, clang, intel, nvidia}
-#   COMPILER={gcc-8, gcc-9, gcc-10,
+#   COMPILER={gcc-9, gcc-10,
 #             clang-8, clang-9, clang-10,
 #             icpc, icpx,
 #             nvcc-11, nvcc-11.2}
@@ -55,11 +55,11 @@
 # $ docker compose run ubuntu-cpp-interactive
 # # /vt/ci/build_cpp.sh /vt /build
 #
-# For a non-interactive build with gcc-8, since gnu is the default compiler
+# For a non-interactive build with gcc-9, since gnu is the default compiler
 # type, one may do the following:
 #
-#  $ COMPILER=gcc-8 docker compose pull ubuntu-cpp
-#  $ COMPILER=gcc-8 docker compose run ubuntu-cpp
+#  $ COMPILER=gcc-9 docker compose pull ubuntu-cpp
+#  $ COMPILER=gcc-9 docker compose run ubuntu-cpp
 #
 
 # Volume will be created automatically for each combination of parameters.

docs/md/building.md

@@ -139,7 +139,7 @@ which `docker compose` will read.
 # Variables:
 #   ARCH={amd64, arm64v8, ...}
 #   COMPILER_TYPE={gnu, clang, intel, nvidia}
-#   COMPILER={gcc-8, gcc-9, gcc-10,
+#   COMPILER={gcc-9, gcc-10,
 #             clang-8, clang-9, clang-10,
 #             icpc, icpx,
 #             nvcc-11, nvcc-11.2}