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# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Contributor: Shiz <hi@shiz.me>
# Contributor: Jeizsm <jeizsm@gmail.com>
# Maintainer: Jakub Jirutka <jakub@jirutka.cz>
pkgname=rust
pkgver=1.23.0
_llvmver=4
_bootver=1.22.0
pkgrel=1
pkgdesc="The Rust Programming Language (compiler)"
url="http://www.rust-lang.org"
arch="x86_64"
license="Apache-2.0 BSD ISC MIT"

# gcc is needed at runtime just for linking. Someday rustc might invoke
# the linker directly, and then we'll only need binutils.
# See: https://github.com/rust-lang/rust/issues/11937
depends="$pkgname-stdlib=$pkgver-r$pkgrel gcc llvm-libunwind-dev musl-dev"

# * Rust is self-hosted, so you need rustc (and cargo) to build rustc...
#   The last revision of this abuild that does not depend on itself (uses
#   prebuilt rustc and cargo) is 8cb3112594f10a8cee5b5412c28a846acb63167f.
# * libffi-dev is needed just because we compile llvm with LLVM_ENABLE_FFI.
makedepends="rust>=$_bootver cargo
	cmake file libffi-dev llvm$_llvmver-dev llvm$_llvmver-test-utils
	python2 tar zlib-dev"

subpackages="$pkgname-dbg $pkgname-stdlib
	$pkgname-gdb::noarch $pkgname-lldb::noarch $pkgname-doc $pkgname-src"
source="https://static.rust-lang.org/dist/rustc-$pkgver-src.tar.gz
	musl-fix-static-linking.patch
	musl-fix-linux_musl_base.patch
	llvm-with-ffi.patch
	static-pie.patch
	need-rpath.patch
	minimize-rpath.patch
	alpine-move-py-scripts-to-share.patch
	alpine-change-rpath-to-rustlib.patch
	alpine-target.patch
	install-template-shebang.patch
	check-rustc
	"
builddir="$srcdir/rustc-$pkgver-src"

_rlibdir="usr/lib/rustlib/$CTARGET/lib"
_sharedir="usr/share/rust"

ldpath="/$_rlibdir"

prepare() {
	default_prepare

	cd "$builddir"

	# Remove bundled dependencies.
	rm -Rf src/llvm/

	# Make sure to use the system LLVM.
	printf '[target.%s]\nllvm-config = "/usr/lib/llvm%s/bin/llvm-config"\n' \
		"$CTARGET" "$_llvmver" > config.toml

	# Save untouched sources for packaging in -src subpackage.
	cp -a "$builddir"/src "$srcdir"/rust-src
}

build() {
	cd "$builddir"

	# jemalloc is disabled, because it increases size of statically linked
	# binaries produced by rustc (stripped hello_world 186 kiB vs. 358 kiB)
	# for only tiny performance boost (even negative in some tests).
	./configure \
		--build="$CBUILD" \
		--host="$CTARGET" \
		--target="$CTARGET" \
		--prefix="/usr" \
		--release-channel="stable" \
		--enable-local-rust \
		--local-rust-root="/usr" \
		--llvm-root="/usr/lib/llvm$_llvmver" \
		--musl-root="/usr" \
		--enable-vendor \
		--enable-llvm-link-shared \
		--disable-jemalloc \
		--disable-docs

	RUST_BACKTRACE=1 \
		RUSTC_CRT_STATIC="false" \
		./x.py build -v
}

check() {
	"$srcdir"/check-rustc "$builddir/build/$CTARGET/stage2/bin/rustc"

# XXX: There's some problem with these tests, we will figure it out later.
#	cd "$builddir"
#	make check \
#		LD_LIBRARY_PATH="$_stage0dir/lib" \
#		RUST_BACKTRACE=1 \
#		RUST_CRT_STATIC="false" \
#		VERBOSE=1
}

package() {
	cd "$builddir"

	RUST_BACKTRACE=1 \
		RUSTC_CRT_STATIC="false" \
		./x.py dist -v

	local component; for component in rustc rust-std; do
		tar -xf "build/dist/$component-$pkgver-$CTARGET.tar.gz"
		./"$component-$pkgver-$CTARGET"/install.sh --destdir="$pkgdir" --prefix=/usr --disable-ldconfig
	done

	cd "$pkgdir"

	# These libraries are identical to those under rustlib/. Since we have
	# linked rustc/rustdoc against those under rustlib/, we can remove
	# them. Read change-rpath-to-rustlib.patch for more info.
	rm -r usr/lib/*.so

	# These objects are for static linking with musl on non-musl systems.
	rm $_rlibdir/crt*.o

	# Shared objects should have executable flag.
	chmod +x $_rlibdir/*.so

	# Python scripts are noarch, so move them to /usr/share.
	# Requires move-py-scripts-to-share.patch to be applied.
	_mv usr/lib/rustlib/etc/*.py $_sharedir/etc/
	rmdir -p usr/lib/rustlib/etc 2>/dev/null || true

	# Remove some clutter.
	cd usr/lib/rustlib
	rm components install.log manifest-* rust-installer-version uninstall.sh
}

stdlib() {
	pkgdesc="Standard library for Rust (static rlibs)"

	_mv "$pkgdir"/$_rlibdir/*.rlib "$subpkgdir"/$_rlibdir/
}

gdb() {
	pkgdesc="GDB pretty printers for Rust"
	depends="$pkgname gdb"

	mkdir -p "$subpkgdir"
	cd "$subpkgdir"

	_mv "$pkgdir"/usr/bin/rust-gdb usr/bin/
	_mv "$pkgdir"/$_sharedir/etc/gdb_*.py $_sharedir/etc/
}

lldb() {
	pkgdesc="LLDB pretty printers for Rust"
	depends="$pkgname lldb py-lldb"

	mkdir -p "$subpkgdir"
	cd "$subpkgdir"

	_mv "$pkgdir"/usr/bin/rust-lldb usr/bin/
	_mv "$pkgdir"/$_sharedir/etc/lldb_*.py $_sharedir/etc/
}

src() {
	pkgdesc="$pkgdesc (source code)"
	depends="$pkgname"
	license="$license OFL-1.1 GPL-3.0-or-later GPL-3.0-with-GCC-exception CC-BY-SA-3.0 LGPL-3.0"

	mkdir -p "$subpkgdir"/usr/src
	mv "$srcdir"/rust-src "$subpkgdir"/usr/src/rust
}

_mv() {
	local dest; for dest; do true; done  # get last argument
	mkdir -p "$dest"
	mv $@
}

sha512sums="a1dbb1a625c6d8dfe9708e1cf478a49154b1eb0aba5ba67ac85518a8c7d1c70d2d86ac4d441156e9bfd0fd77ca241fb5491a2bd68aefcf0b3c2e164c3cc29e4e  rustc-1.23.0-src.tar.gz
cee98ff6cded8a330e383b8b88423b10b7c2cdcb711b31f4685abae7a60f85869e87f3096eb2d90a83dafeeba98b6f153b5e67d88f5cacc368dc53c701fe495b  musl-fix-static-linking.patch
360b0c1b6374cb356989b6f254da2dfc2ab2390c8251f0151492206b908ebf85c6ff57405394b3f46f1fc3e26f7c986bb9e924065f4c4dfa1d50fff2a99b5cd0  musl-fix-linux_musl_base.patch
dc6432293bd060d5e3a73f25870867654fae61995dcd919e244a2dc686b6107556deed8c59ca6002182bfeff5ebc1ca2b89c4028ab0fbfb79e65defe47c9b4b0  llvm-with-ffi.patch
936ddccb357307b3f7f3c10aadcdc3dfbbe0ccb8cc5675969a87b7cf1a8e72f73ed5118c6cd6a1a36a377457ead998cc8c71f4176361acb4416ec16673b4c597  static-pie.patch
b5c8a4faf3571b5c79b052103639ea3b14f094ec0999963602111608afa1159219f958decf0b45dd409124b318f5e17af47b4e74207a9f1c9648a9572dc68cca  need-rpath.patch
d352614e7c774e181decae210140e789de7fc090327ff371981ad28a11ce51c8c01b27c1101a24bb84d75ed2f706f67868f7dbc52196d4ccdf4ebd2d6d6b6b5e  minimize-rpath.patch
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0542e8ffeb7ff6017aeec84d99c14802c6536433b41dafe7c8fc0c40908548228f34ef142ad6ad94235115b05f02ce157553b470b0f242292f90f3125b249e94  alpine-change-rpath-to-rustlib.patch
412bb856ce474c2a027d29be5dc9bbe6475ecf92fdf21c5b05f3aa234b86626652d582e7197681a52fff5e3c29b456137edb7b2dfa3a4346a6b3b487dfff7fa5  alpine-target.patch
7d59258d4462eba0207739a5c0c8baf1f19d9a396e5547bb4d59d700eb94d50ba6add2e523f3e94e29e993821018594625ea4ac86304fb58f7f8c82622a26ab0  install-template-shebang.patch
79549055dea81379c890b495c82456ab497a9179ec6702c59e11d0748bc668f47fc3d6a69c27a0545bb87c01318631dffc69260bf2d4badc75f53cbf7fad7528  check-rustc"