distributable:
  url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ version }}/llvm-project-{{ version }}.src.tar.xz
  strip-components: 1

versions:
  github: llvm/llvm-project
  strip: /^LLVM /

provides:
  - bin/lld
  - bin/clang
  - bin/clang++

build:
  dependencies:
    tea.xyz/gx/cc: c99
    cmake.org: 3
    ninja-build.org: 1
    python.org: 3
  working-directory: build
  script: |-
    cmake \
      ../llvm \
      -G Ninja \
      $ARGS
    ninja
    ninja install

    #TMP these are required for many build-scripts to function
    # however we want to provide a “generic” system for this
    # but it's too early

    cd {{ prefix }}/bin
    ln -sf clang cc
    ln -sf clang++ c++
    ln -sf lld ld
    for x in ar as strip objcopy nm objdump ranlib readelf strings; do
      ln -sf llvm-$x $x
    done

    # need this or if `gcc` is in the PATH then configure often will use `gcc`
    # coupled with one of the above as a sub-task (eg. `as`) and gcc feeds it
    # the wrong args
    #FIXME longer term we should not have any hacks outside of `build.ts`
    ln -sf clang gcc
    ln -sf clang++ g++

  #TODO the above hacks should be a separate directory that can be added
  # to the PATH when tea.xyz/gx/cc is used
  #NOTE they must be symlinks as clang/llvm behave differently based on their arg0 name
  receipt:
    - LLVMConfig.cmake
  env:
    ARGS:
      - -DCMAKE_INSTALL_PREFIX="{{ prefix }}"
      - -DCMAKE_BUILD_TYPE=Release
      - -DLLVM_ENABLE_PROJECTS='lld;clang'
      - -DLLVM_INCLUDE_DOCS=OFF
      - -DLLVM_INCLUDE_TESTS=OFF
      # the default is `ld` however clang when handling linking itself
      # internally passes flags that, in fact, expect `lld`
      #NOTE yes this is an issue even if `ld` is in fact a symlink to `lld`
      - -DCLANG_DEFAULT_LINKER=lld
    linux/x86-64:
      ARGS:
      # required to build something that works on linux/x86-64
      - -DCLANG_DEFAULT_CXX_STDLIB=libstdc++
      - -DCLANG_DEFAULT_RTLIB=libgcc
      - -DCOMPILER_RT_INCLUDE_TESTS=OFF
      - -DCOMPILER_RT_USE_LIBCXX=OFF"
test:
  fixture: |
    #include <stdio.h>
    int main() {
      printf("Hello World!\n");
      return 0;
    }
  script: |
    mv $FIXTURE $FIXTURE.c
    clang $FIXTURE.c
    ./a.out