llvm-core/flang: Add 23.0.0_pre20260428 snapshot

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

llvm-core/flang/Manifest

@@ -2,4 +2,5 @@ DIST llvm-project-21.1.8.src.tar.xz 158958576 BLAKE2B 0d3d4ee920f8e5db50e9815261
 DIST llvm-project-21.1.8.src.tar.xz.sig 119 BLAKE2B cffc1825f5778a3e3c128ec3e856ff6ee50687319d621cdf42e895abf67e05cc51cb7493308e2b506ab60dbdbaca7aa75eb9f78d91d42c81f9682a36f4042e9d SHA512 10f58eff58ed6e701d0f123b15e68c82ab8cbdf99b1c86c0d83e3b8553e90ea51055e30327e8e442ded57c8f503e2a2de9ee075e9c28b5ba815a0f8922f8671c
 DIST llvm-project-22.1.4.src.tar.xz 167028880 BLAKE2B cd867371fecc8b4771c919a4d966cec25539dbaff5398e9c62ab5fe2f82b97bcc097f2319194cb796f6ee874b83c001ece5dc2d2e41c8807f88d91e67b71cf61 SHA512 9f9e84110a4bb0f0dd296eaed4acb4fd3a58838efe62bb88671399440ba4750ba8bd7e6d072e61a9946e38e5c9d5e50575b95964850769c51cd517bdf7425bb8
 DIST llvm-project-22.1.4.src.tar.xz.sig 119 BLAKE2B ff8004fd03f1d5be9da33ddf19b9c4d9408f0dfb0e9e141eeb3cffec4fd285017f913b8f624a7aa1316c228928abb95832aabea43712507f4f644cf59e757bc8 SHA512 29287637e8c2e40666c6cca054622f894a132925d532017c0f3144573757cce50f85dcc356f48b335dee7115627ff249b287ad821075835314dce0dfbc733b8a
+DIST llvm-project-6f2e1a120ebb75da9b3fe6afb19231aa0f801a34.tar.gz 270304465 BLAKE2B 43bca1c7f0996febbf3e840375f6b91d18a83e197890fbb19724a217e772b111ca33b15098b969cb74797dd67ca81b23b8ca36b35f084f6252e3a4b38e431c82 SHA512 28cf27b9f65b8525ba30bbfda6765b14bd5db8c5c88ef711fee408b691dd2b9e373db99f4862e76d692571ebf4e746cd9495ad6c8248e07e9b574cee066a20da
 DIST llvm-project-99457c368586b1debf49f55b3a0684317f5f298d.tar.gz 269907211 BLAKE2B aae5040ece1fa0eacd32468feee9896d614b7e91044ef504df2c80fc57fb42d2db162f01cfdd9c91c7e80fb9fa109440b6887451c96227f47308eb99d9249ef9 SHA512 0e865b56b8f3bf3f7e0fb9a5dfaa97b7d82c915e14474d07d7c036641f68727f2a81179110e3a1c3b424e0233d55589c568fcde2a98aec3a0882ab3a45c62e6c

llvm-core/flang/flang-23.0.0_pre20260428.ebuild

@@ -0,0 +1,101 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} )
+inherit cmake flag-o-matic llvm.org python-any-r1 toolchain-funcs
+
+DESCRIPTION="LLVM's Fortran frontend"
+HOMEPAGE="https://flang.llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions"
+SLOT="${LLVM_MAJOR}/${LLVM_SOABI}"
+IUSE="+clang +debug test"
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	~llvm-core/clang-${PV}[debug=]
+	~llvm-core/llvm-${PV}[debug=]
+	~llvm-core/mlir-${PV}[debug=]
+"
+RDEPEND="
+	${DEPEND}
+"
+PDEPEND="
+	>=llvm-runtimes/flang-rt-${PV}:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? ( llvm-core/clang )
+	test? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)
+"
+
+LLVM_COMPONENTS=( flang cmake )
+LLVM_TEST_COMPONENTS=( clang/test/Driver mlir/test/lib )
+LLVM_USE_TARGETS=llvm+eq
+llvm.org_set_globals
+
+python_check_deps() {
+	python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_pretend() {
+	if ! use clang && tc-is-gcc; then
+		ewarn "Building using GCC requires lots of memory (up to 10 GiB per process)."
+		ewarn "Consider enabling USE=clang."
+		ewarn "See https://gcc.gnu.org/PR119705"
+	fi
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+}
+
+src_configure() {
+	if use clang; then
+		# Only do this conditionally to allow overriding with
+		# e.g. CC=clang-13 in case of breakage
+		if ! tc-is-clang ; then
+			local -x CC=${CHOST}-clang
+			local -x CXX=${CHOST}-clang++
+		fi
+
+		strip-unsupported-flags
+	fi
+
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}"
+
+		-DLLVM_ROOT="${ESYSROOT}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DCLANG_RESOURCE_DIR="../../../clang/${LLVM_MAJOR}"
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DMLIR_LINK_MLIR_DYLIB=ON
+		# flang does not feature a dylib, so do not install libraries
+		# or headers
+		-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON
+		# installed by llvm-runtimes/flang-rt
+		-DFLANG_INCLUDE_RUNTIME=OFF
+
+		# TODO: always enable to obtain reproducible tools
+		-DFLANG_INCLUDE_TESTS=$(usex test)
+
+		-DLLVM_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+	)
+	use test && mycmakeargs+=(
+		-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-flang
+}