use archlinux instead of ubuntu for sanitizers

Author: jorgen

docker/archlinux/Dockerfile

@@ -0,0 +1,17 @@
+FROM archlinux:latest
+
+RUN pacman -Syu --noconfirm && \
+  pacman -S --noconfirm base-devel clang libc++ cmake ninja git vim
+
+ENV CXX=clang++
+ENV CC=clang
+
+RUN git clone --depth=1 https://github.com/llvm/llvm-project && \
+    cd llvm-project && \
+    mkdir build; \
+    cmake -G Ninja -S runtimes -B build -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" -DLLVM_USE_SANITIZER=MemoryWithOrigins  -DCMAKE_INSTALL_PREFIX=/opt && \
+    ninja -C build cxx cxxabi && \
+    ninja -C build install-cxx install-cxxabi
+
+ENV MSAN_CFLAGS="-std=c++20 -fsanitize=memory -nostdinc++ -I/opt/include -I/opt/include/c++/v1"
+ENV MSAN_LFLAGS="-fsanitize=memory -stdlib=libc++ -L/opt/lib -lc++abi -Wl,-rpath,/opt/lib"