From d105ba0a9864cb38393386b0c9d1430e63f8f268 Mon Sep 17 00:00:00 2001
From: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Date: Sun, 23 Jan 2022 09:45:11 -0500
Subject: dev-lang/zig: import, llvm_targets support

---
 dev-lang/zig/Manifest         |   1 +
 dev-lang/zig/metadata.xml     |   8 ++++
 dev-lang/zig/zig-0.9.0.ebuild | 101 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 110 insertions(+)
 create mode 100644 dev-lang/zig/Manifest
 create mode 100644 dev-lang/zig/metadata.xml
 create mode 100644 dev-lang/zig/zig-0.9.0.ebuild

diff --git a/dev-lang/zig/Manifest b/dev-lang/zig/Manifest
new file mode 100644
index 0000000..b55846f
--- /dev/null
+++ b/dev-lang/zig/Manifest
@@ -0,0 +1 @@
+DIST zig-0.9.0.tar.gz 21994175 BLAKE2B aadef89d5fddc3e802965125625e62140ac37bdac40b29ab8b7652056589c037cbed5d4e46889f335b3c296fb4ae2a7cafd5d064a02d728a8325ad515cdc8c7a SHA512 fef36221e818364b45cf65de210b0a9d535c411a510371a3ab4dfd6f4621c0a16dba786169f115a006966875102acc742abee19a74d83e2bc999ea5b8304b879
diff --git a/dev-lang/zig/metadata.xml b/dev-lang/zig/metadata.xml
new file mode 100644
index 0000000..9a74b67
--- /dev/null
+++ b/dev-lang/zig/metadata.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<!-- maintainer-needed -->
+	<upstream>
+		<remote-id type="github">ziglang/zig</remote-id>
+	</upstream>
+</pkgmetadata>
diff --git a/dev-lang/zig/zig-0.9.0.ebuild b/dev-lang/zig/zig-0.9.0.ebuild
new file mode 100644
index 0000000..76f45f3
--- /dev/null
+++ b/dev-lang/zig/zig-0.9.0.ebuild
@@ -0,0 +1,101 @@
+# Copyright 2019-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+LLVM_MAX_SLOT=13
+inherit cmake llvm
+
+DESCRIPTION="A robust, optimal, and maintainable programming language"
+HOMEPAGE="https://ziglang.org/"
+if [[ ${PV} == 9999 ]]; then
+	EGIT_REPO_URI="https://github.com/ziglang/zig.git"
+	inherit git-r3
+else
+	SRC_URI="https://github.com/ziglang/zig/archive/${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~amd64 ~arm ~arm64"
+fi
+
+LICENSE="MIT"
+SLOT="0"
+RESTRICT="!test? ( test )"
+
+BUILD_DIR="${S}/build"
+
+# According to zig's author, zig builds that do not support all targets are not
+# supported by the upstream project.
+ALL_LLVM_TARGETS=(
+	AArch64 AMDGPU ARM AVR BPF Hexagon Lanai Mips MSP430 NVPTX
+	PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore
+)
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS="${ALL_LLVM_TARGETS[@]/%/(-)?}"
+
+IUSE="test ${ALL_LLVM_TARGETS[*]}"
+
+RDEPEND="
+	sys-devel/clang:${LLVM_MAX_SLOT}
+	>=sys-devel/lld-${LLVM_MAX_SLOT}
+	<sys-devel/lld-$((${LLVM_MAX_SLOT} + 1))
+	sys-devel/llvm:${LLVM_MAX_SLOT}[${LLVM_TARGET_USEDEPS// /,}]
+"
+DEPEND="${RDEPEND}"
+
+llvm_check_deps() {
+	has_version "sys-devel/clang:${LLVM_SLOT}"
+}
+
+src_configure() {
+	local mysedargs=() llvm_target arch
+	for target in "${ALL_LLVM_TARGETS[@]}"; do
+		if ! use $target; then
+			llvm_target=${target#llvm_targets_}
+			case $llvm_target in
+				AArch64) arch=(aarch64 aarch64_be aarch64_32);;
+				AMDGPU) arch=(amdgcn);;
+				ARM) arch=(thumb thumbeb arm armeb);;
+				AVR) arch=(avr);;
+				BPF) arch=(bpfel bpfeb);;
+				Hexagon) arch=(hexagon);;
+				Lanai) arch=(lanai);;
+				Mips) arch=(mips mipsel mips64 mips64el);;
+				MSP430) arch=(msp430);;
+				NVPTX) arch=(nvptx nvptx64);;
+				PowerPC) arch=(powerpc powerpcle powerpc64 powerpc64le);;
+				RISCV) arch=(riscv32 riscv64);;
+				Sparc) arch=(sparc sparcv9 sparcel);;
+				SystemZ) arch=(s390x);;
+				WebAssembly) arch=(wasm32 wasm64);;
+				X86) arch=(i386 x86_64);;
+				XCore) arch=(xcore);;
+				*) die "unhandled target"
+			esac
+			for a in ${arch[@]}; do
+				mysedargs+=(
+					-e "/^pub fn targetTriple(/,/^}/s/\.$a => .*/.$a => return error.@\"Zig compiled without LLVM $llvm_target\",/"
+				)
+			done
+			mysedargs+=(
+				-e "/^fn initializeLLVMTarget(/,/^}/ {
+						/\.$a => {/,/},$/ {
+							s/=>.*/=> unreachable,/
+							/=>/!d
+						}
+					}"
+			)
+		fi
+	done
+	sed -i "${mysedargs[@]}" src/codegen/llvm.zig || die
+
+	local mycmakeargs=(
+		-DZIG_USE_CCACHE=OFF
+		-DZIG_PREFER_CLANG_CPP_DYLIB=ON
+	)
+
+	cmake_src_configure
+}
+
+src_test() {
+	cd "${BUILD_DIR}" || die
+	./zig build test || die
+}
-- 
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