#!/bin/sh

MAKEDEPS="make ninja cmake libedit libffi libxml2 ncurses python-setuptools python-sphinx"
DEPS="perl zlib libffi libedit ncurses"

PKG_VER=13.0.0
SOURCE="https://github.com/llvm/llvm-project/releases/download/llvmorg-$PKG_VER/llvm-project-$PKG_VER.src.tar.xz"
DESC="Low Level Virtual Machine"

ADDITIONAL="
clang-001-fix-unwind-chain-inclusion.patch
clang-002-add-musl-triples.patch
libcxx-musl.patch
libcxx-ssp-nonshared.patch
libcxxabi-dl.patch
lldb-musl.patch
llvm-001-musl.patch
llvm-004-override-opt.patch"

prepare () {
    apply_patches
    cd llvm
    sed -i 's|__ptrace_request|int|g' \
				../lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp

    # disable  lldb docs, since they fail to generate
    sed -i '/add_subdirectory(docs)/d' \
			../lldb/CMakeLists.txt


    sed -i 's,check_library_exists(gcc_s .*,set(LIBCXXABI_HAS_GCC_S_LIB ON),' \
		../libcxxabi/cmake/config-ix.cmake
	sed -i 's,check_library_exists(gcc .*,set(LIBCXXABI_HAS_GCC_LIB ON),' \
		../libcxxabi/cmake/config-ix.cmake


    sed -i 's,# Set common link flags.,list(APPEND SANITIZER_COMMON_LINK_LIBS execinfo),' \
				../compiler-rt/CMakeLists.txt

    export CFLAGS="$CFLAGS -g1"
    export CXXFLAGS="$CXXFLAGS -g1"
}

build () {
    mkdir build
    cd build
    cmake \
            -DCMAKE_BUILD_TYPE=Release \
            -DENABLE_LINKER_BUILD_ID=YES \
            -DLLVM_USE_LINKER=lld \
            -DLLDB_USE_SYSTEM_SIX=YES \
            -DLIBCXX_CXX_ABI=libcxxabi \
            -DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=YES \
            -DLIBCXXABI_USE_LLVM_UNWINDER=YES \
            -DLIBCXXABI_ENABLE_STATIC_UNWINDER=YES \
            -DLIBOMP_ENABLE_SHARED=YES \
            -DLIBOMP_INSTALL_ALIASES=NO \
            -DLLVM_INCLUDE_DOCS=YES \
            -DLLVM_INSTALL_UTILS=YES \
            -DLLVM_BUILD_LLVM_DYLIB=YES \
            -DLLVM_LINK_LLVM_DYLIB=YES \
            -DLLVM_ENABLE_RTTI=YES \
            -DLLVM_ENABLE_FFI=YES \
            -DLLVM_BINUTILS_INCDIR=/usr/include \
            -DCMAKE_INSTALL_PREFIX=/usr \
            -DLLVM_BUILD_DOCS=OFF \
            -DLIBCXX_HAS_MUSL_LIBC=YES \
            -DLLVM_BUILD_EXAMPLES=OFF \
            -DLLVM_BUILD_TESTS=ON \
            -DLLVM_DEFAULT_TARGET_TRIPLE="x86_64-linux-musl" \
            -DLLVM_ENABLE_ASSERTIONS=OFF \
            -DLLVM_ENABLE_PIC=ON \
            -DLLVM_ENABLE_SPHINX=OFF \
            -DLLVM_ENABLE_TERMINFO=ON \
            -DLLVM_ENABLE_ZLIB=ON \
            -DLLVM_HOST_TRIPLE="x86_64-linux-musl" \
            -DLLVM_INCLUDE_EXAMPLES=OFF \
            -DLLVM_APPEND_VC_REV=OFF \
            -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;libcxx;libcxxabi;libunwind;lldb;lld;openmp" \
            -Wno-dev -G Ninja ..                      &&

    ninja llvm-tblgen &&
    ninja
}

package () {
    DESTDIR=$PKG_DEST ninja install
}