[PATCH] D139752: cmake: Enable 64bit off_t on 32bit glibc systems

[Steven Johnson via Phabricator via llvm-commits]

srj added a comment.

>> I wonder if this could be a bug in a specific version(s) of CMake? What version(s) have you tried replicating with? Our buildbots are using v3.22.6 (Halide requires a minimum of 3.22).
>
> I am using cmake 3.25.1

I get the same failure when using CMake 25.1 as well (linux x86-64). I can't explain the failure, but it is 100% reproducible for me on x86-64 Linux using CMake 3.25.1. Try these steps to repeat when building from scratch:

  $ export LLVM_INSTALL_DIR=path/to/llvm/install/directory
  
  # Build a local 32-bit build of LLVM (with this patch in place)
  $ CC='gcc -m32' \
    CXX='g++ -m32' \
    LD='ld -melf_i386' \
    cmake \
      -D LLVM_BUILD_32_BITS=ON \
      -D CMAKE_FIND_ROOT_PATH=/usr/lib/i386-linux-gnu \
      -D CMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
      -D CMAKE_BUILD_TYPE=Release \
      -D CMAKE_INSTALL_PREFIX=${LLVM_INSTALL_DIR} \
      -D LLVM_CCACHE_BUILD=ON \
      -D LLVM_CCACHE_MAXSIZE=20G \
      -D LLVM_BUILD_32_BITS=OFF \
      -D LLVM_ENABLE_ASSERTIONS=ON \
      -D LLVM_ENABLE_CURL=OFF \
      -D LLVM_ENABLE_HTTPLIB=OFF \
      -D LLVM_ENABLE_LIBXML2=OFF \
      -D LLVM_ENABLE_PROJECTS="clang;lld" \
      -D LLVM_ENABLE_RTTI=ON \
      -D LLVM_ENABLE_TERMINFO=OFF \
      -D LLVM_ENABLE_ZLIB=OFF \
      -D LLVM_ENABLE_ZSTD=OFF \
      -D LLVM_ENABLE_OCAMLDOC=OFF \
      -D LLVM_ENABLE_BINDINGS=OFF \
      -D LLVM_ENABLE_IDE=OFF \
      -D LLVM_TARGETS_TO_BUILD="X86;ARM;NVPTX;AArch64;PowerPC;Hexagon;WebAssembly;RISCV" \
      -S path/to/llvm/source/tree \
      -B path/to/llvm/build/directory \
      -G Ninja
  
  $  ninja install
  
  # Clone Halide
  $ git clone https://github.com/halide/Halide path/to/halide/source
  
  # Build Halide
  $ CC='gcc -m32' \
    CXX='g++ -m32' \
    LD='ld -melf_i386' \
    cmake \
      -DCMAKE_BUILD_TYPE=Release \
      -DHalide_CCACHE_BUILD=ON \
      -DLLVM_DIR=${LLVM_INSTALL_DIR}/lib/cmake/llvm \
      -DWITH_PYTHON_BINDINGS=OFF \
      -DHalide_TARGET=x86-32-linux\
      -S path/to/halide/source \
      -B path/to/halide/build-dir \
      -G Ninja
  
  $ ninja Halide




Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D139752/new/

https://reviews.llvm.org/D139752