Dockerfile.musl

# Alpine edge with musl — fully static h5cpp-compiler build
FROM docker.io/library/alpine:edge

RUN apk update && apk add --no-cache \
    build-base \
    cmake \
    ninja \
    llvm20-dev \
    llvm20-static \
    clang20-dev \
    clang20-static \
    zlib-dev \
    zlib-static \
    zstd-dev \
    zstd-static \
    libxml2-dev \
    libxml2-static \
    libffi-dev \
    linux-headers

# Alpine's llvm20-dev / clang20-dev CMake exports reference every target LLVM
# can build, but the -static subpackage only ships the libraries needed for
# normal linking.  We create empty archives for the missing testing libs and
# downgrade the existence-check FATAL_ERROR to WARNING so configure succeeds.
RUN for lib in LLVMTestingAnnotations LLVMTestingSupport llvm_gtest llvm_gtest_main LTO LLVMgold LLVM Remarks; do \
        ar rcs /usr/lib/llvm20/lib/lib${lib}.a; \
    done && \
    for f in /usr/lib/llvm20/lib/cmake/llvm/LLVMExports.cmake \
             /usr/lib/llvm20/lib/cmake/llvm/LLVMExports-release.cmake \
             /usr/lib/llvm20/lib/cmake/clang/ClangTargets.cmake \
             /usr/lib/llvm20/lib/cmake/clang/ClangTargets-release.cmake; do \
        [ -f "$f" ] && sed -i 's/message(FATAL_ERROR/message(WARNING/g' "$f"; \
    done

WORKDIR /src
COPY . .

RUN cmake -S . -B build -G Ninja \
    -DCMAKE_BUILD_TYPE=Release \
    -DH5CPP_STATIC_LINK_LLVM=ON \
    -DCMAKE_EXE_LINKER_FLAGS="-static" \
    -DLLVM_DIR=/usr/lib/llvm20/lib/cmake/llvm \
    -DClang_DIR=/usr/lib/llvm20/lib/cmake/clang

RUN cmake --build build --parallel

# Verify it is static
RUN file build/h5cpp && (ldd build/h5cpp 2>/dev/null || echo "Not a dynamic executable (good)")