# Contributor: Eric Molitor <eric@molitor.org>
# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Contributor: Rasmus Thomsen <oss@cogitri.dev>
# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
pkgver=19.1.7
pkgrel=4
_llvmver=${pkgver%%.*}
_prevllvmver=$((_llvmver - 1))
pkgname=lld$_llvmver
pkgdesc="The LLVM Linker"
url="https://llvm.org/"
arch="all"
license="Apache-2.0"
depends_dev="$pkgname=$pkgver-r$pkgrel"
makedepends="
	clang$_llvmver
	cmake
	compiler-rt
	libedit-dev
	libxml2-dev
	llvm$_llvmver-dev
	llvm$_llvmver-gtest
	llvm$_llvmver-static
	llvm$_llvmver-test-utils
	llvm-libunwind-dev
	patchelf
	samurai
	scudo-malloc
	zlib-dev
	"
checkdepends="gtest-dev bash llvm$_llvmver-test-utils"
subpackages="$pkgname-dbg $pkgname-libs $pkgname-dev $pkgname-doc"
source="https://github.com/llvm/llvm-project/releases/download/llvmorg-${pkgver//_/-}/lld-${pkgver//_/}.src.tar.xz
	https://github.com/llvm/llvm-project/releases/download/llvmorg-${pkgver//_/-}/cmake-${pkgver//_/}.src.tar.xz
	"
builddir="$srcdir/lld-${pkgver//_/}.src"

# whether this is the default lld version (keep in sync with llvm)
_default_lld="no"

if [ "$_default_lld" = yes ]; then
	provides="lld=$pkgver-r$pkgrel"
	replaces="lld"

	dev() {
		default_dev
		provides="lld-dev=$pkgver-r$pkgrel"
		replaces="lld-dev"
	}
fi

replaces="lld$_prevllvmver"

prepare() {
	default_prepare
	mv "$srcdir"/cmake-${pkgver//_/}.src "$srcdir"/cmake
}

build() {
	CFLAGS="$CFLAGS -O2 -DNDEBUG -g1" \
	CXXFLAGS="$CXXFLAGS -O2 -DNDEBUG -g1" \
	CC=clang-$_llvmver CXX=clang++-$_llvmver \
	cmake -B build -G Ninja -Wno-dev \
		-DCMAKE_BUILD_TYPE=None \
		-DCMAKE_INSTALL_PREFIX=/usr \
		-DCMAKE_SKIP_INSTALL_RPATH=ON \
		-DBUILD_SHARED_LIBS=ON \
		-DLLVM_INCLUDE_TESTS="$(want_check && echo ON || echo OFF)" \
		-DLLVM_EXTERNAL_LIT=/usr/lib/llvm$_llvmver/bin/lit \
		-DLLD_BUILT_STANDALONE=ON \
		-DCMAKE_EXE_LINKER_FLAGS="$LDFLAGS -Wl,-z,stack-size=2097152"
	cmake --build build
}

check() {
	ninja -C build check-lld
}

package() {
	DESTDIR="$pkgdir" cmake --install build
	install -Dm644 docs/ld.lld.1 -t "$pkgdir"/usr/share/man/man1/

	# we have the scudo allocator available, so link lld to it to
	# significantly improve performance, especially in LTO contexts
	patchelf --add-needed libscudo.so "$pkgdir"/usr/bin/lld
}

doc() {
	default_doc
	replaces="lld-doc lld$_prevllvmver-doc"
}

sha512sums="
346b556db83a2c50eba61e906b2255a77822a320e93b9e2b10d2d5c48e293080caa48b3eb203da13a6d94ba099766e2663aeb1e79a26c64c5396fd936bc036b5  lld-19.1.7.src.tar.xz
3ff56e1a61dbace35d8c168ad5c94c5a09d92eb683494bfe1deabcb3640cf79b7422d44903d049d2298d54c2874f9a60c4f13f6795a3949e7eaefd5d42e62621  cmake-19.1.7.src.tar.xz
"
