dev-cpp/folly: fix build w/ boost-1.89

Choose the hack approach and require >=1.71.

Closes: https://bugs.gentoo.org/962946
Signed-off-by: Sam James <sam@gentoo.org>

dev-cpp/folly/files/folly-2025.04.14.00-boost-1.89.patch

@@ -0,0 +1,22 @@
+https://bugs.gentoo.org/962946
+https://github.com/facebook/folly/issues/2489
+--- a/CMake/folly-config.cmake.in
++++ b/CMake/folly-config.cmake.in
+@@ -38,7 +38,6 @@ find_dependency(Boost 1.51.0 MODULE
+     filesystem
+     program_options
+     regex
+-    system
+     thread
+   REQUIRED
+ )
+--- a/CMake/folly-deps.cmake
++++ b/CMake/folly-deps.cmake
+@@ -41,7 +41,6 @@ find_package(Boost 1.51.0 MODULE
+     filesystem
+     program_options
+     regex
+-    system
+     thread
+   REQUIRED
+ )

dev-cpp/folly/folly-2025.04.14.00-r2.ebuild

@@ -0,0 +1,123 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# These must be bumped together:
+# dev-cpp/edencommon
+# dev-cpp/fb303
+# dev-cpp/fbthrift
+# dev-cpp/fizz
+# dev-cpp/folly
+# dev-cpp/mvfst
+# dev-cpp/wangle
+# dev-util/watchman
+
+inherit flag-o-matic cmake toolchain-funcs
+
+DESCRIPTION="An open-source C++ library developed and used at Facebook"
+HOMEPAGE="https://github.com/facebook/folly"
+SRC_URI="https://github.com/facebook/folly/releases/download/v${PV}/${PN}-v${PV}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0/${PV}"
+KEYWORDS="~amd64 ~arm64 ~ppc64"
+IUSE="io-uring llvm-libunwind test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	app-arch/bzip2
+	app-arch/lz4:=
+	app-arch/snappy:=
+	app-arch/xz-utils
+	app-arch/zstd:=
+	dev-cpp/fast_float:=
+	dev-cpp/gflags:=
+	dev-cpp/glog:=[gflags]
+	>=dev-libs/boost-1.71:=[context]
+	dev-libs/double-conversion:=
+	dev-libs/libaio
+	dev-libs/libevent:=
+	dev-libs/libfmt:=
+	dev-libs/libsodium:=
+	dev-libs/openssl:=
+	sys-libs/zlib
+	llvm-libunwind? ( llvm-runtimes/libunwind:= )
+	!llvm-libunwind? ( sys-libs/libunwind:= )
+	io-uring? ( >=sys-libs/liburing-2.10:= )
+"
+DEPEND="
+	${RDEPEND}
+	sys-libs/binutils-libs
+	test? ( dev-cpp/gtest )
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-2024.11.04.00-musl-fix.patch
+	"${FILESDIR}"/${PN}-2025.04.14.00-boost-1.89.patch
+)
+
+src_unpack() {
+	# Workaround for bug #889420
+	mkdir -p "${S}" || die
+	cd "${S}" || die
+	default
+}
+
+src_prepare() {
+	# Folly has no configuration option for disabling io_uring support
+	# so we need to patch it out.
+	if use !io-uring; then
+		eapply "${FILESDIR}"/${PN}-2025.04.14.00-force-liburing-off.patch
+		eapply "${FILESDIR}"/${PN}-2025.04.14.00-CMake-Avoid-finding-liburing.patch
+	fi
+
+	cmake_src_prepare
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_DIR="$(get_libdir)/cmake/${PN}"
+		-DLIB_INSTALL_DIR="$(get_libdir)"
+
+		-DBUILD_TESTS=$(usex test)
+
+		# https://github.com/gentoo/gentoo/pull/29393
+		-DCMAKE_LIBRARY_ARCHITECTURE=$(usex amd64 x86_64 ${ARCH})
+	)
+
+	# https://github.com/facebook/folly/issues/1984
+	use arm64 && append-cxxflags "-flax-vector-conversions"
+
+	cmake_src_configure
+}
+
+src_test() {
+	CMAKE_SKIP_TESTS=(
+		# Mysterious "invalid json" failure
+		io_async_ssl_session_test.SSLSessionTest
+		singleton_thread_local_test.SingletonThreadLocalDeathTest
+		# TODO: All SIGSEGV, report upstream!
+		'concurrency_concurrent_hash_map_test.*'
+	)
+
+	if use arm64; then
+		CMAKE_SKIP_TESTS+=(
+			# Tests are flaky/timing dependent on both QEMU chroot and real hardware
+			io_async_hh_wheel_timer_test.HHWheelTimerTest
+			# Times out on real hardware
+			concurrent_skip_list_test.ConcurrentSkipList
+			futures_retrying_test.RetryingTest.largeRetries
+		)
+	fi
+
+	if [[ $(tc-get-cxx-stdlib) == libc++ ]]; then
+		CMAKE_SKIP_TESTS+=(
+			# Aborts with libc++.
+			# https://github.com/facebook/folly/issues/2345
+			buffered_atomic_test.BufferedAtomic.singleThreadUnguardedAccess
+		)
+	fi
+
+	cmake_src_test
+}