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 /
  ignore: 15.y.z
  # ^^ won’t even build pkg-config lol
  # tested: [15.0.0]

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

dependencies:
  zlib.net: 1
  darwin:
    apple.com/xcode/clt: '*'

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
  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
    linux:
      ARGS:
      # the default is `ld` however clang when handling linking itself
      # internally passes flags that, in fact, expect `lld`
      #NOTE only wanted on linux because on macOS we actually *need* the Apple
      # provided `ld` or things *also* break 😆
      - -DCLANG_DEFAULT_LINKER=lld
    darwin:
      ARGS:
      #FIXME shouldn’t *have to* require the command line tools package
      #FIXME this is no good for systems with only Xcode installed
      #NOTE how do Apple make their LLVM find both? we want the same trick
      - -DDEFAULT_SYSROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
    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