Building libshaderc_shared on AlmaLinux

[rossant]

I'm unable to build libshaderc_shader.so on AlmaLinux (to include in a Python manylinux wheel) using Docker.

Here is my script:

#!/bin/bash

# Exit immediately if a command exits with a non-zero status
set -e

# Docker image
DOCKER_IMAGE="quay.io/pypa/manylinux_2_28_x86_64"

# Shaderc Git tag to use
SHADERC_TAG="v2024.4"

# Build libshaderc_shared.so in the Docker container
docker run --rm -it "$DOCKER_IMAGE" /bin/bash -c "
    set -e
    # Install necessary tools
    yum install -y \
        git \
        cmake \
        ninja-build \
        gcc \
        gcc-c++ \
        python3 \
        make

    # Clone the shaderc repository and checkout the specified tag
    git clone https://github.com/google/shaderc /shaderc
    cd /shaderc
    git checkout $SHADERC_TAG

    # Sync dependencies
    ./utils/git-sync-deps

    # Build libshaderc_shared.so
    mkdir -p build && cd build
    cmake -GNinja \
        -DCMAKE_BUILD_TYPE=Release \
        -DSHADERC_SKIP_TESTS=ON \
        -DSHADERC_SKIP_EXAMPLES=ON \
        -DSHADERC_SKIP_INSTALL=ON \
        ..
    ninja

    # Copy the built shared library to the output directory
    cp libshaderc_shared.so /shaderc/libshaderc_shared.so
"

and the output

HEAD is now at caa54d9 Finalize Shaderc v2024.4
third_party/effcee                   @ d74d33d93043952a99ae7cd7458baf6bc8df1da0
third_party/re2                      @ 4a8cee3dd3c3d81b6fe8b867811e193d5819df07
third_party/spirv-headers            @ 3f17b2af6784bfa2c5aa5dbb8e0e74a607dd8b3b
third_party/abseil_cpp               @ 1315c900e1ddbb08a23e06eeb9a06450052ccb5e
third_party/googletest               @ 1d17ea141d2c11b8917d2c7d029f1c4e2b9769b2
third_party/spirv-tools              @ 4d2f0b40bfe290dea6c6904dafdf7fd8328ba346
third_party/glslang                  @ a0995c49ebcaca2c6d3b03efbabf74f3843decdb
-- The C compiler identification is GNU 14.2.1
-- The CXX compiler identification is GNU 14.2.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /opt/rh/gcc-toolset-14/root/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /opt/rh/gcc-toolset-14/root/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Shaderc: build type is "Release".
-- Configuring Shaderc to avoid building tests.
-- Configuring Shaderc to avoid building examples.
-- Configuring Shaderc to check copyrights.
-- asciidoctor was not found - no documentation will be generated
-- Found Python: /usr/local/bin/python3.13 (found version "3.13.1") found components: Interpreter
-- Performing Test COMPILER_SUPPORTS_FALLTHROUGH_WARNING
-- Performing Test COMPILER_SUPPORTS_FALLTHROUGH_WARNING - Success
-- Performing Test COMPILER_SUPPORTS_EXTRA_SEMI_WARNING
-- Performing Test COMPILER_SUPPORTS_EXTRA_SEMI_WARNING - Success
-- Performing Test COMPILER_SUPPORTS_PIC
-- Performing Test COMPILER_SUPPORTS_PIC - Success
-- Found Python3: /usr/local/bin/python3.13 (found version "3.13.1") found components: Interpreter
-- optimizer enabled
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Configuring done (3.0s)
CMake Error: install(EXPORT "glslang-targets" ...) includes target "SPIRV" which requires target "SPIRV-Tools-opt" that is not in any export set.
CMake Error: install(EXPORT "glslang-targets" ...) includes target "glslang" which requires target "SPIRV-Tools-opt" that is not in any export set.
-- Generating done (0.1s)
CMake Generate step failed.  Build files cannot be regenerated correctly

Any hints would be greatly appreciated! Thanks.

[rossant]

Update: it looks like shaderc is using C23 features that require glibc 2.38, which make it impossible to compile on AlmaLinux 9 (glibc 2.34) and, therefore, impossible to bundle in a Python wheel (as far as I understand).

Would you potentially consider relaxing the requirements so that shaderc can be built on older systems?