PKGBUILD

pkgbase="llvm-project"
pkgname='llvm'
pkgver=19.1.3
pkgrel=1
pkgdesc="The LLVM Core libraries provide a modern source- and target-independent optimizer, along with code generation support for many popular CPUs."
arch=('x86_64')
url="https://llvm.org/"
license=('custom:University of Illinois/NCSA Open Source License')
depends=('perl' 'libffi')
makedepends=('gcc-libs' 'python3' 'ocaml' 'gcc' 'groff' 'swig' 'cmake') # 'ocaml-ctypes' 'findlib' needed to have CMake build find ocaml
source=("https://github.com/llvm/llvm-project/releases/download/llvmorg-${pkgver}/${pkgbase}-${pkgver}.src.tar.xz")
md5sums=('ec2e698a03ceb4a12d35f2e0dfa208ce')

prepare() {
    cd ${pkgbase}-${pkgver}.src

    # http://llvm.org/bugs/show_bug.cgi?id=22742
    #chmod -R u=rwX,go=rX ${srcdir}/llvm-${pkgver}.src
    # https://www.mail-archive.com/blfs-dev@lists.linuxfromscratch.org/msg09727.html
    #sed -i "/ipc_perm, mode/s@^C@//C@" projects/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
}

build() {
    _ffi_include_flags=$(pkg-config --cflags-only-I libffi)
    _ffi_libs_flags=$(pkg-config --libs-only-L libffi)

    cmake -B build -S ${pkgbase}-${pkgver}.src/llvm \
            -DCMAKE_BUILD_TYPE:STRING=Release \
            -DCMAKE_INSTALL_PREFIX:PATH=/usr \
            -DLLVM_ENABLE_PROJECTS="lld" \
            -DLLVM_APPEND_VC_REV:BOOL=ON \
            -DLLVM_ENABLE_RTTI:BOOL=ON \
            -DLLVM_ENABLE_FFI:BOOL=ON \
            -DFFI_INCLUDE_DIR:PATH="${_ffi_include_flags#-I}" \
            -DFFI_LIBRARY_DIR:PATH="${_ffi_libs_flags#-L}" \
            -DLLVM_BUILD_LLVM_DYLIB:BOOL=ON \
            -DLLVM_LINK_LLVM_DYLIB:BOOL=ON \
            -DLLVM_BINUTILS_INCDIR:PATH=/usr/include \
            -DLLVM_INCLUDE_BENCHMARKS=OFF \
            -DBUG_REPORT_URL="https://kaosx.us/docs/bugs/"
            #-DLLVM_COMMON_CMAKE_UTILS=${CMAKE_CURRENT_SOURCE_DIR}/../cmake-${pkgver}.src
    cmake --build build
}

package() {

    DESTDIR=${pkgdir} cmake --install build

    # Fix permissions of static libs
    chmod -x ${pkgdir}/usr/lib/*.a

    install -D -m644 llvm-project-${pkgver}.src/llvm/LICENSE.TXT ${pkgdir}/usr/share/licenses/${pkgname}/LICENSE
}