Compilation error with Clang 20: deprecated literal operator operator"" _sv #3370
Description
Describe the bug
When building AWS SDK C++ version 1.11.539 with Clang 20 and C++20, the build fails due to deprecated syntax used in StringView.h, specifically the use of a whitespace between operator"" and _sv.
Regression Issue
- Select this option if this issue appears to be a regression.
Expected Behavior
The SDK should compile cleanly with Clang 20 and C++20 without triggering deprecated literal operator warnings/errors.
Current Behavior
/app/third_party/aws-sdk-cpp/crt/aws-crt-cpp/include/aws/crt/StringView.h:838:63: error: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Werror,-Wdeprecated-literal-operator]
838 | inline basic_string_view<char32_t> operator"" _sv(const char32_t *s, size_t length) noexcept
| ~~~~~~~~~~~^~~
| operator""_sv
Reproduction Steps
FROM ubuntu:25.04
WORKDIR /app
ARG DEBIAN_FRONTEND=noninteractive
RUN apt-get update && \
apt-get install -y \
libarchive-dev \
curl \
libcurl4-openssl-dev \
unzip \
python3-dev autotools-dev libicu-dev libbz2-dev \
cmake \
clang-tidy \
wget \
valgrind \
git \
ninja-build \
autoconf libtool libtool-bin && \
update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-20 100 && \
update-alternatives --install /usr/bin/clang clang /usr/bin/clang-20 100 && \
rm -rf /var/lib/apt/lists/*
WORKDIR /app/third_party
RUN git clone --recursive --branch=1.11.539 https://github.com/aws/aws-sdk-cpp.git && \
cd aws-sdk-cpp && \
cmake -B build -DCMAKE_BUILD_TYPE=MinSizeRel -DENABLE_TESTING=OFF -DCMAKE_INSTALL_PREFIX=/usr/local/ -DBUILD_ONLY="s3" && \
cmake --build build --parallel 20 && \
cmake --build build --target install && \
cd .. && rm -r aws-sdk-cpp
Failed:
/app/third_party/aws-sdk-cpp/crt/aws-crt-cpp/include/aws/crt/StringView.h:838:63: error: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Werror,-Wdeprecated-literal-operator]
838 | inline basic_string_view<char32_t> operator"" _sv(const char32_t *s, size_t length) noexcept
| ~~~~~~~~~~~^~~
| operator""_sv
Possible Solution
No response
Additional Information/Context
No response
AWS CPP SDK version used
1.11.539
Compiler and Version used
clang version 20.1.1 / gcc 14.2.0
Operating System and version
ubuntu:25.04