#!/bin/sh -e

export DESTDIR="$1"

cd llvm
cmake -B build \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_BUILD_TYPE=Release \
    -DLLVM_BUILD_LLVM_DYLIB=ON \
    -DLLVM_LINK_LLVM_DYLIB=ON \
    -DLLVM_TARGETS_TO_BUILD="host;AMDGPU" \
    -DLLVM_ENABLE_RTTI=ON \
    -DLLVM_HOST_TRIPLE="$(cc -dumpmachine)" \
    -DLLVM_INCLUDE_BENCHMARKS=OFF \
    -DLLVM_INCLUDE_EXAMPLES=OFF \
    -DLLVM_INCLUDE_DOCS=OFF \
    -DLLVM_INCLUDE_TESTS=OFF \
    -DLLVM_ENABLE_TERMINFO=OFF \
    -DLLVM_ENABLE_LIBXML2=OFF \
    -Wno-dev

cmake --build   build
cmake --install build

# Use new llvm-config to generate a pkg-config file.
PATH="$1/usr/bin:$PATH"
mkdir -p "$1/usr/lib/pkgconfig"

# shellcheck disable=2016
sed -e "s|$1||" -e 's|/usr/include|\${includedir}|' \
    > "$1/usr/lib/pkgconfig/llvm.pc" <<EOF
prefix=/usr
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include
has_rtti=$(llvm-config --has-rtti)

Name: LLVM
Description: LLVM compiler infrastructure
URL: https://llvm.org
Version: $(llvm-config --version)
Requires:
Requires.private: zlib
Libs: -L\${libdir} $(llvm-config --libs)
Libs.private: -lstdc++ $(llvm-config --libs --link-static)
Cflags: $(llvm-config --cflags)
EOF