llvm-core/lld: Add 21.0.0_pre20250607 snapshot

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

llvm-core/lld/Manifest

@@ -11,4 +11,5 @@ DIST llvm-project-19.1.7.src.tar.xz 141249332 BLAKE2B 1259ed7f9aca7b35e89d818bef
 DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf6f30e75705123d067ea97175d91d7a5b6a75008df01d99ae7aa16aaa3b101f3f41e38d01f04158f95a261d617b3ede0254cd SHA512 195797b06ac80a742e0ccbc03a50dc06dd2e04377d783d5474e3e72c5a75203b60292b047929312a411d22b137a239943fba414a4d136a2be14cbff978eb6bda
 DIST llvm-project-20.1.6.src.tar.xz 147239668 BLAKE2B ccd86730fdea3dd40ebf054661b854b9332204389db2205e1e7b2a7f140fc187cacb34de68aa9a63c15c1e17b1d0976c080cfdee7e2cb6b0dd5570001d84be12 SHA512 aae652fdc61bda3f80b1340a3270b687355bfb6817f4bc05dac2268a2f8c5fc677eadb515cda7c8518005f1dc39e7ce5d1c34bbc5a25f106ef8e6c8f1ecfdf6d
 DIST llvm-project-20.1.6.src.tar.xz.sig 566 BLAKE2B b7c48cfc1f6c9f513dadb8837b150e22043c215bf4958a8036c4077aeebdcf7c18223b0ce0ffbcacb2c7ddfeb06611b1022528ee04d3efda1ee1aa58367a9203 SHA512 0884048ff164a1f5caed0f1aabec173630a08ece98cf793d21b77fc969501e4f03daec39ae0fb124ad34a3436ceae66452e36a42c309f19790b7a87652482691
+DIST llvm-project-23d0c7348aacdfcb145a69e533a14131bae830cc.tar.gz 237123683 BLAKE2B 6713c82809a9793510615f54c3ad9b8b1d2449939b0c48ab10acd1a0db43b712b229356173c90b514bc91c08e9b2be7f8e54f797661b9743ae8c3aaa9acee15f SHA512 de94ab38f1d46124638d6e0650142a1612db27871ffa339c56224aba94a77f8ae6eb8c68ad0a5ed3fe000d7bff309d324cdb66a095be3c8211abfe600659bf1a
 DIST llvm-project-f8ca9e59cb438bd35b29a6d7cf6d72f50673aec9.tar.gz 236069626 BLAKE2B 5547770a22e5fd0240c0e435d0b0af0ebd789aa72d6829250917f2df605f9a95c6756bc1afc9b611b176c1ba8394c757b94789511b98b38c6ade6cca4c9ce7f6 SHA512 b1fffd7d4f5ede9bcda759bc59cdd47373a44a3bbd31a50d1d213e438a59f1da3cc96780a1d17ecaeb14454822921476406a6c37493354169f72e1fab7b3a3be

llvm-core/lld/lld-21.0.0_pre20250607.ebuild

@@ -0,0 +1,89 @@
+# Copyright 1999-2025 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="The LLVM linker (link editor)"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="${LLVM_MAJOR}/${LLVM_SOABI}"
+IUSE="+debug test zstd"
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	~llvm-core/llvm-${PV}[debug=,zstd=]
+	sys-libs/zlib:=
+	zstd? ( app-arch/zstd:= )
+"
+RDEPEND="
+	${DEPEND}
+	!llvm-core/lld:0
+"
+BDEPEND="
+	llvm-core/llvm:${LLVM_MAJOR}
+	test? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)
+"
+PDEPEND="
+	>=llvm-core/lld-toolchain-symlinks-16-r2:${LLVM_MAJOR}
+"
+
+LLVM_COMPONENTS=( lld cmake libunwind/include/mach-o )
+llvm.org_set_globals
+
+python_check_deps() {
+	python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+}
+
+src_unpack() {
+	llvm.org_src_unpack
+
+	# Directory ${WORKDIR}/llvm does not exist with USE="-test",
+	# but LLVM_MAIN_SRC_DIR="${WORKDIR}/llvm" is set below,
+	# and ${LLVM_MAIN_SRC_DIR}/../libunwind/include is used by build system
+	# (lld/MachO/CMakeLists.txt) and is expected to be resolvable
+	# to existent directory ${WORKDIR}/libunwind/include.
+	mkdir -p "${WORKDIR}/llvm" || die
+}
+
+src_configure() {
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	use elibc_musl && append-ldflags -Wl,-z,stack-size=2097152
+
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DLLVM_ROOT="${ESYSROOT}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DBUILD_SHARED_LIBS=ON
+		-DLLVM_INCLUDE_TESTS=$(usex test)
+		-DLLVM_ENABLE_ZLIB=FORCE_ON
+		-DLLVM_ENABLE_ZSTD=$(usex zstd FORCE_ON OFF)
+	)
+
+	use test && mycmakeargs+=(
+		-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	tc-is-cross-compiler &&	mycmakeargs+=(
+		-DLLVM_TABLEGEN_EXE="${BROOT}/usr/lib/llvm/${LLVM_MAJOR}/bin/llvm-tblgen"
+	)
+
+	cmake_src_configure
+}
+
+src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-lld
+}