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File PKGBUILD of Package llvm

# Maintainer: Evangelos Foutras <foutrelis@archlinux.org>
# Contributor: Jan "heftig" Steffens <jan.steffens@gmail.com>

pkgname=('llvm' 'llvm-libs')
pkgver=20.1.8
pkgrel=100
arch=('x86_64')
url="https://llvm.org/"
license=('Apache-2.0 WITH LLVM-exception')
makedepends=('cmake' 'ninja' 'zlib' 'zstd' 'curl' 'libffi' 'libedit' 'libxml2'
             'python-setuptools' 'python-psutil' 'python-sphinx'
             'python-myst-parser')
options=('staticlibs' '!lto' '!debug') # tools/llvm-shlib/typeids.test fails with LTO
_source_base=https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver
source=($_source_base/llvm-$pkgver.src.tar.xz
        $_source_base/cmake-$pkgver.src.tar.xz
        $_source_base/third-party-$pkgver.src.tar.xz)
sha256sums=('SKIP'
            'SKIP'
            'SKIP')
#validpgpkeys=('474E22316ABF4785A88C6E8EA2C794A986419D8A'  # Tom Stellard <tstellar@redhat.com>
#              'D574BD5D1D0E98895E3BF90044F2485E45D59042') # Tobias Hieta <tobias@hieta.se>

# Utilizing LLVM_DISTRIBUTION_COMPONENTS to avoid
# installing static libraries; inspired by Gentoo
_get_distribution_components() {
  local target
  ninja -t targets | grep -Po 'install-\K.*(?=-stripped:)' | while read -r target; do
    case $target in
      llvm-libraries|distribution)
        continue
        ;;
      # shared libraries
      LLVM|LLVMgold)
        ;;
      # libraries needed for clang-tblgen
      LLVMDemangle|LLVMSupport|LLVMTableGen)
        ;;
      # used by lldb
      LLVMDebuginfod)
        ;;
      # testing libraries
      LLVMTestingAnnotations|LLVMTestingSupport)
        ;;
      # exclude static libraries
      LLVM*)
        continue
        ;;
      # exclude llvm-exegesis (doesn't seem useful without libpfm)
      llvm-exegesis)
        continue
        ;;
    esac
    echo $target
  done
}

prepare() {
  rename -v -- "-$pkgver.src" '' {cmake,third-party}-$pkgver.src
  cd llvm-$pkgver.src
  mkdir build

  # Remove CMake find module for zstd; breaks if out of sync with upstream zstd
  rm cmake/modules/Findzstd.cmake
}

build() {
  cd llvm-$pkgver.src/build

  # Build only minimal debug info to reduce size
  CFLAGS=${CFLAGS/-g /-g1 }
  CXXFLAGS=${CXXFLAGS/-g /-g1 }

  local cmake_args=(
    -G Ninja
    -DCMAKE_BUILD_TYPE=Release
    -DCMAKE_INSTALL_DOCDIR=share/doc
    -DCMAKE_INSTALL_PREFIX=/usr
    -DCMAKE_SKIP_RPATH=ON
    -DLLVM_BINUTILS_INCDIR=/usr/include
    -DLLVM_BUILD_DOCS=ON
    -DLLVM_BUILD_LLVM_DYLIB=ON
    -DLLVM_BUILD_TESTS=ON
    -DLLVM_ENABLE_BINDINGS=OFF
    -DLLVM_ENABLE_CURL=ON
    -DLLVM_ENABLE_FFI=ON
    -DLLVM_ENABLE_RTTI=ON
    -DLLVM_ENABLE_SPHINX=ON
    -DLLVM_HOST_TRIPLE=$CHOST
    -DLLVM_INCLUDE_BENCHMARKS=OFF
    -DLLVM_INSTALL_GTEST=ON
    -DLLVM_INSTALL_UTILS=ON
    -DLLVM_LINK_LLVM_DYLIB=ON
    -DLLVM_USE_PERF=ON
    -DSPHINX_WARNINGS_AS_ERRORS=OFF
    -DPACKAGE_BUGREPORT=https://gitlab.archlinux.org/archlinux/packaging/packages/llvm/-/issues
  )

  cmake .. "${cmake_args[@]}"
  local distribution_components=$(_get_distribution_components | paste -sd\;)
  test -n "$distribution_components"
  cmake_args+=(-DLLVM_DISTRIBUTION_COMPONENTS="$distribution_components")

  cmake .. "${cmake_args[@]}"
  ninja
}

#check() {
#  cd llvm-$pkgver.src/build
#  LD_LIBRARY_PATH=$PWD/lib ninja check
#}

package_llvm() {
  pkgdesc="Compiler infrastructure"
  depends=('llvm-libs' 'curl' 'perl')

  cd llvm-$pkgver.src/build

  DESTDIR="$pkgdir" ninja install-distribution

  # Include lit for running lit-based tests in other projects
  pushd ../utils/lit
  python3 setup.py install --root="$pkgdir" -O1
  popd

  # The runtime libraries go into llvm-libs
  mv -f "$pkgdir"/usr/lib/lib{LLVM,LTO,Remarks}*.so* "$srcdir"
  mv -f "$pkgdir"/usr/lib/LLVMgold.so "$srcdir"

  # Remove documentation sources
  rm -r "$pkgdir"/usr/share/doc/llvm/html/{_sources,.buildinfo}

  install -Dm644 ../LICENSE.TXT "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
}

package_llvm-libs() {
  pkgdesc="LLVM runtime libraries"
  depends=('gcc-libs' 'zlib' 'zstd' 'libffi' 'libedit' 'libxml2')
  provides=('libLLVM.so' 'libLTO.so' 'libRemarks.so')

  install -d "$pkgdir/usr/lib"
  cp -P \
    "$srcdir"/lib{LLVM,LTO,Remarks}*.so* \
    "$srcdir"/LLVMgold.so \
    "$pkgdir/usr/lib/"

  # Symlink LLVMgold.so from /usr/lib/bfd-plugins
  # https://bugs.archlinux.org/task/28479
  install -d "$pkgdir/usr/lib/bfd-plugins"
  ln -s ../LLVMgold.so "$pkgdir/usr/lib/bfd-plugins/LLVMgold.so"

  install -Dm644 "$srcdir/llvm-$pkgver.src/LICENSE.TXT" \
    "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
}

# vim:set ts=2 sw=2 et:
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