FROM ubuntu:focal as base
ARG LLVM=17
ENV DEBIAN_FRONTEND=noninteractive
ADD https://apt.llvm.org/llvm-snapshot.gpg.key /etc/apt/trusted.gpg.d/llvm.asc
RUN chmod 0644 /etc/apt/trusted.gpg.d/llvm.asc \
 && echo "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${LLVM} main" > /etc/apt/sources.list.d/llvm.list \
 && echo "Acquire::https::Verify-Peer \"false\";" > /etc/apt/apt.conf.d/insecure-ssl.conf \
 && apt-get update -y \
 && apt-get install -y clang-${LLVM} libc++-${LLVM}-dev libc++abi-${LLVM}-dev

FROM base as pkgs
RUN printf "#include <stdint.h>\n#include <algorithm>\n" > test.cpp \
 && clang++-17 -std=c++98 -stdlib=libc++ -pedantic-errors -c test.cpp