Add Lean 4

2 files changed, 63 insertions, 0 deletions

diff --git a/README.md b/README.md
index d110e66..0f9b4ec 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ other overlays, or modifying less-than-ideals in the upstream ebuild repository.
 - [guile-commonmark](https://github.com/OrangeShark/guile-commonmark) as dev-scheme/guile-commonmark
 - [guile-email](https://guile-email.systemreboot.net/) as dev-scheme/guile-email
 - [GoatTracker 2](http://covertbitops.c64.org/) as media-sound/goattracker
+- [Lean 4](https://leanprover.github.io/) as sci-mathematics/lean
 - [MilkyTracker](https://milkytracker.titandemo.org/) as media-sound/milkytracker
 - [NBlood](https://nukeykt.retrohost.net/) as games-fps/nblood
 - [xkeysnail](https://github.com/mooz/xkeysnail) as x11-misc/xkeysnail
diff --git a/sci-mathematics/lean/lean-4.0.9999.ebuild b/sci-mathematics/lean/lean-4.0.9999.ebuild
new file mode 100644
index 0000000..e384ebd
--- /dev/null
+++ b/sci-mathematics/lean/lean-4.0.9999.ebuild
@@ -0,0 +1,62 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+MAJOR=$(ver_cut 1)
+CMAKE_IN_SOURCE_BUILD="ON"
+CMAKE_MAKEFILE_GENERATOR=emake
+
+
+inherit flag-o-matic cmake readme.gentoo-r1
+
+DESCRIPTION="The Lean Theorem Prover"
+HOMEPAGE="https://leanprover-community.github.io/"
+
+if [[ ${PV} == *9999* ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/leanprover/lean4.git"
+else
+	SRC_URI="https://github.com/leanprover-community/lean/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~amd64 ~x86"
+fi
+
+LICENSE="Apache-2.0"
+SLOT="0/${MAJOR}"
+IUSE="debug +threads"
+
+RDEPEND="dev-libs/gmp:="
+DEPEND="${RDEPEND}"
+
+src_configure() {
+	local CMAKE_BUILD_TYPE
+	if use debug; then
+		CMAKE_BUILD_TYPE="Debug"
+	else
+		CMAKE_BUILD_TYPE="Release"
+	fi
+
+	filter-lto
+
+	local mycmakeargs=(
+		-DALPHA=ON
+		-DAUTO_THREAD_FINALIZATION=ON
+		-DLEAN_EXTRA_CXX_FLAGS="${CXXFLAGS}"
+		-DMULTI_THREAD=$(usex threads)
+		-DUSE_GITHASH=OFF
+	)
+	cmake_src_configure
+}
+
+src_test() {
+	local myctestargs=(
+		# Disable problematic "style_check" cpplint test,
+		# this also removes the python test dependency
+		--exclude-regex style_check
+	)
+	cmake_src_test
+}
+
+src_install() {
+	cmake_src_install
+}