cfi_ignorelist.txt doesn't seem to be installed

[cjdb]

Given

"/usr/bin/clang-scan-deps-18" \
  -format=p1689 -- \
  /usr/bin/clang++ \
  --target=x86_64-unknown-linux-gnu  \
  -I/tmp/project/source \
  -fdiagnostics-color=always \
  -fstack-protector-strong \
  -fvisibility=hidden \
  -stdlib=libstdc++ \
  -O3 -DNDEBUG \
  -std=c++20 \
  -flto=thin \
  -fsanitize=cfi \
  -x c++ \
  /tmp/project/source/message.cpp \
  -c -o source/CMakeFiles/message.dir/message.cpp.o \
  -MT source/CMakeFiles/message.dir/message.cpp.o.ddi \
  -MD -MF source/CMakeFiles/message.dir/message.cpp.o.ddi.d \
  > source/CMakeFiles/message.dir/message.cpp.o.ddi.tmp && mv source/CMakeFiles/message.dir/message.cpp.o.ddi.tmp source/CMakeFiles/message.dir/message.cpp.o.ddi

I get

error: missing sanitizer ignorelist: '/usr/lib/clang/18/share/cfi_ignorelist.txt'
Error while scanning dependencies for /tmp/project/source/message.cpp:
error: missing sanitizer ignorelist: '/usr/lib/clang/18/share/cfi_ignorelist.txt'

It seems this file isn't copied across when building the apt packages for Ubuntu Mantic in a Docker instance.

FROM ubuntu:mantic

RUN apt-get update && \
    apt-get dist-upgrade -y && \
    apt-get update && \
    apt-get install -y software-properties-common && \
    add-apt-repository universe && \
    apt-get update && \
    apt-get install -y wget && \
    wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add - && \
    apt-add-repository 'deb http://apt.llvm.org/mantic/ llvm-toolchain-mantic main' && \
    apt-get update && \
    apt-get install -y \
        ninja-build python3 python3-pip python3-git python-is-python3 git wget gcc g++ curl zip unzip tar pkg-config \
        libllvm18 \
        llvm   \
        llvm-18-dev \
        llvm-18-runtime \
        clang \
        clang-tools \
        libclang-common-18-dev \
        libclang-18-dev \
        libclang1-18 \
        clang-format \
        python3-clang \
        clang-tidy \
        libclang-rt-18-dev \
        lldb \
        lld \
        libc++-18-dev \
        libc++abi-18-dev \
        libunwind-18-dev && \
    python3 -m pip install lit cmake --break-system-packages

[cjdb]

More information (for tracking):

$ clang --version
Ubuntu clang version 18.0.0 (++20240114083315+49138d97c0d8-1~exp1~20240114083441.251)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

[cjdb]

It looks like this has been solved as of dbbeee6.

[cjdb]

This is still an issue: I misread where the file was installed. It's currently installed to /usr/lib/llvm-18/lib/clang/18/share/cfi_ignorelist.txt.

[hiraditya]

I'm getting this error on top-of-trunk llvm. Is there a fix for it?

[abhisen7]

Seems like you can pass -fno-sanitize-ignorelist to Clang to not look for the file, but I am curious as to how to fix this when I do need it to exempt certain files/functions from CFI checks