dev-ml/llvm: Add 20.1.0_rc1

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-ml/llvm/Manifest

@@ -11,4 +11,6 @@ DIST llvm-project-19.1.4.src.tar.xz.sig 438 BLAKE2B b0925bdb761046d69779e0b035e2
 DIST llvm-project-19.1.7.src.tar.xz 141249332 BLAKE2B 1259ed7f9aca7b35e89d818befdee20fd8bed4d2dc2c2c6f6f56451fd43d35ac03a0a5a406e142d22b25137999dc5b17471c196f8fcf79f20a8296832d900f6d SHA512 c7d63286d662707a9cd54758c9e3aaf52794a91900c484c4a6efa62d90bc719d5e7a345e4192feeb0c9fd11c82570d64677c781e5be1d645556b6aa018e47ec8
 DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf6f30e75705123d067ea97175d91d7a5b6a75008df01d99ae7aa16aaa3b101f3f41e38d01f04158f95a261d617b3ede0254cd SHA512 195797b06ac80a742e0ccbc03a50dc06dd2e04377d783d5474e3e72c5a75203b60292b047929312a411d22b137a239943fba414a4d136a2be14cbff978eb6bda
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
+DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
+DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23

dev-ml/llvm/llvm-20.1.0_rc1.ebuild

@@ -0,0 +1,107 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+inherit cmake llvm.org llvm-utils python-any-r1
+
+DESCRIPTION="OCaml bindings for LLVM"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0/${PV}"
+IUSE="+debug test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	>=dev-lang/ocaml-4.00.0:0=
+	dev-ml/ocaml-ctypes:=
+	~llvm-core/llvm-${PV}:=[debug?]
+	!llvm-core/llvm[ocaml(-)]
+"
+
+DEPEND="
+	${RDEPEND}
+"
+BDEPEND="
+	${PYTHON_DEPS}
+	dev-lang/perl
+	dev-ml/findlib
+"
+
+LLVM_COMPONENTS=( llvm cmake third-party )
+LLVM_USE_TARGETS=llvm
+llvm.org_set_globals
+
+src_configure() {
+	llvm_prepend_path "${LLVM_MAJOR}"
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DLLVM_BUILD_LLVM_DYLIB=ON
+		-DLLVM_LINK_LLVM_DYLIB=ON
+		-DLLVM_OCAML_OUT_OF_TREE=ON
+
+		# cheap hack: LLVM combines both anyway, and the only difference
+		# is that the former list is explicitly verified at cmake time
+		-DLLVM_TARGETS_TO_BUILD=""
+		-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+		-DLLVM_BUILD_TESTS=$(usex test)
+
+		# disable various irrelevant deps and settings
+		-DLLVM_ENABLE_FFI=OFF
+		-DLLVM_ENABLE_TERMINFO=OFF
+		-DHAVE_HISTEDIT_H=NO
+		-DLLVM_ENABLE_ASSERTIONS=$(usex debug)
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+
+		-DLLVM_HOST_TRIPLE="${CHOST}"
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+
+		# TODO: ocamldoc
+	)
+
+	use test && mycmakeargs+=(
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	# also: custom rules for OCaml do not work for CPPFLAGS
+	use debug || local -x CFLAGS="${CFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	local llvm_libdir=$(llvm-config --libdir)
+	# an ugly hack; TODO: figure out a way to pass -L to ocaml...
+	cd "${BUILD_DIR}/${libdir}" || die
+	ln -s "${llvm_libdir}"/*.so . || die
+
+	if use test; then
+		local llvm_bindir=$(llvm-config --bindir)
+		# Force using system-installed tools.
+		sed -i -e "/llvm_tools_dir/s@\".*\"@\"${llvm_bindir}\"@" \
+			"${BUILD_DIR}"/test/lit.site.cfg.py || die
+	fi
+}
+
+src_compile() {
+	cmake_build ocaml_all
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-llvm-bindings-ocaml
+}
+
+src_install() {
+	DESTDIR="${D}" \
+	cmake -P "${BUILD_DIR}"/bindings/ocaml/cmake_install.cmake || die
+
+	dodoc bindings/ocaml/README.txt
+}