# Maintainer:
pkgname=scudo-malloc
# tied to llvm version
pkgver=16.0.6
pkgrel=1
pkgdesc="Standalone scudo malloc from compiler-rt"
url="https://llvm.org"
arch="all"
license="Apache-2.0 WITH LLVM-exception"
depends_dev="$pkgname=$pkgver-r$pkgrel"
makedepends="linux-headers"
checkdepends="gtest-dev"
subpackages="$pkgname-static $pkgname-dev"
source="https://github.com/llvm/llvm-project/releases/download/llvmorg-${pkgver//_/-}/compiler-rt-${pkgver//_/}.src.tar.xz
	va_args.patch
	"
builddir="$srcdir/compiler-rt-${pkgver//_/}.src/lib/scudo/standalone"

prepare() {
	default_prepare

	# these can't build against musl because of mallopt/malloc_info
	rm -fv tests/wrappers_*_test.cpp
	# mallocs into oom(?)
	rm -fv tests/combined_test.cpp
}

build() {
	export CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wno-mismatched-new-delete -std=c++17 -fvisibility=hidden -fno-exceptions -fno-rtti -pthread -fPIC -O3 -Iinclude -I. -DNDEBUG -DSCUDO_CAN_USE_PRIMARY64=0"

	case "$CARCH" in
	aarch64)
		# this has broken emulation in aarch64 qemu (incl qemu-user),
		# which causes it to abort instantly
		export CXXFLAGS="$CXXFLAGS -DSCUDO_DISABLE_TBI"
		;;
	esac

	msg "building libscudo"
	${CXX:-c++} ./*.cpp $CXXFLAGS -ffreestanding -nostdinc++ -c

	# on arches with hardware crc32, the code can runtime detect it,
	# so rebuild the crc32 object
	case "$CARCH" in
	aarch64)
		rm -fv crc32_hw.o
		msg "rebuilding crc32_hw.cpp"
		${CXX:-c++} ./crc32_hw.cpp $CXXFLAGS -ffreestanding -nostdinc++ -c -march=armv8-a+crc
		;;
	x86|x86_64)
		rm -fv crc32_hw.o
		msg "rebuilding crc32_hw.cpp"
		${CXX:-c++} ./crc32_hw.cpp $CXXFLAGS -ffreestanding -nostdinc++ -c -mcrc32
		;;
	esac

	msg "linking libscudo"
	# this is just a standard malloc interface, so we don't need an soname or versioning for it
	${CXX:-c++} ./*.o $CXXFLAGS $LDFLAGS -shared -o libscudo.so

	${AR:-ar} rcs libscudo.a ./*.o

	if want_check; then
		msg "building tests"
		${CXX:-c++} ./tests/*_test.cpp ./*.cpp tests/scudo_unit_test_main.cpp -o scudo_test $CXXFLAGS -g $LDFLAGS -L. -lgtest
	fi
}

check() {
	./scudo_test
}

package() {
	install -Dm755 libscudo.so -t "$pkgdir"/usr/lib/
	install -Dm644 libscudo.a -t "$pkgdir"/usr/lib/
	install -Dm644 include/scudo/interface.h -t "$pkgdir"/usr/include/scudo/
}

sha512sums="
852e2105facb12ea0943aa24e0c220f76671ad76dfe7d07b8164c3a1d8360670ca565a2b6dd590722b974e16a2adf3c466fdabdfd3bb3ebbd005162c8ac4406c  compiler-rt-16.0.6.src.tar.xz
353efde0a155e9d07c06ed778ade5c3434520e7c90b70947357f199ffe31883ae6924b9dfce0f61e655479f93b9b6699f89d8a5f9a8950f12e47244781c44748  va_args.patch
"