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: /^llvmorg-/

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

dependencies:
  zlib.net: 1

build:
  dependencies:
    cmake.org: 3
    ninja-build.org: 1
    python.org: 3
    crates.io/semverator: '*'
  working-directory: build
  script:
    # Building compiler-rt on darwin+aarch64 fails for versions less than
    # 14 with the below configuration. FIXME if possible, of course.
    - run: |
        if test "{{hw.platform}}" = "linux" || \
           test "{{hw.arch}}" = "x86-64" || \
           semverator satisies '>=14'; then
             ARGS="$ARGS -DLLVM_ENABLE_RUNTIMES='compiler-rt'"
        fi
    - 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
      - -DLLVM_ENABLE_RTTI=ON
    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
        # Needed with the CMAKE_C_COMPILER_TARGET to compile compiler-rt on linux
        # https://reviews.llvm.org/D147598
        - -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
    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
        # otherwise compiler-rt fails to build
        # https://reviews.llvm.org/D147598
        - -DCMAKE_C_COMPILER_TARGET="x86_64-unknown-linux-gnu"
    linux/aarch64:
      ARGS:
        # otherwise compiler-rt fails to build
        # https://reviews.llvm.org/D147598
        - -DCMAKE_C_COMPILER_TARGET="aarch64-unknown-linux-gnu"

test:
  fixture: |
    #include <stdio.h>
    int main() {
      printf("Hello World!\n");
      return 0;
    }
  dependencies:
    crates.io/semverator: '*'
  script:
    # Building compiler-rt on darwin+aarch64 fails for versions less than
    # 14 with the below configuration. FIXME if possible, of course.
    - run: |
        if test "{{hw.platform}}" = "linux" || \
           test "{{hw.arch}}" = "x86-64" || \
           semverator satisies '>=14'; then
             ARGS="$ARGS -fsanitize=address,undefined"
        fi
    - mv $FIXTURE $FIXTURE.c
    - clang $ARGS $FIXTURE.c
    - ./a.out
  env:
    ARGS:
      - -Wl,-rpath,$PKGX_DIR