# Contributor: Travis Tilley <ttilley@gmail.com>
# Maintainer: Travis Tilley <ttilley@gmail.com>
pkgname=llvm
pkgver=3.6.1
pkgrel=4
use_svn="false"
pkgdesc="low level virtual machine compiler system"
arch="all"
url="http://llvm.org/"
license="UOI-NCSA"
depends=""
depends_dev="perl"
makedepends="$depends_dev paxmark cmake make flex bison groff musl-dev binutils-dev isl-dev libffi-dev libxml2-dev libxml2-utils zlib-dev ncurses-dev python python-dev py-sphinx chrpath"
[ "${use_svn}" = "true" ] && makedepends="$makedepends subversion"
install=
subpackages="clang clang-doc:clang_doc $pkgname-dev $pkgname-doc $pkgname-libs"
source="
	llvm-0001-fix-shared-build.patch
	llvm-0002-musl-triple.patch
	llvm-0003-musl-hacks.patch
	compiler-rt-0001-musl-no-dlvsym.patch
	compiler-rt-0002-musl-no-sanitizers.patch
	compiler-rt-0003-off_t.patch
	clang-0001-fix-stdint.h.patch
	clang-0002-fix-unwind-header.patch
	clang-0003-add-alpine-linux-distro.patch
	clang-0004-alpine-use-z-relro.patch
	clang-0005-alpine-hash-style-gnu.patch
	clang-0006-musl-alpine-triple.patch
	clang-0007-musl-dynamic-linker-paths.patch
	clang-0008-alpine-PIE-by-default.patch
	clang-0009-pass-host-triple-to-compiler-rt.patch
	clang-0010-alpine-use-z-now.patch
	clang-0011-alpine-SSP-by-default.patch
	"
if [ "${use_svn}" != "true" ]; then
	source="$source
		http://llvm.org/releases/$pkgver/llvm-$pkgver.src.tar.xz
		http://llvm.org/releases/$pkgver/cfe-$pkgver.src.tar.xz
		http://llvm.org/releases/$pkgver/clang-tools-extra-$pkgver.src.tar.xz
		http://llvm.org/releases/$pkgver/compiler-rt-$pkgver.src.tar.xz
		http://llvm.org/releases/$pkgver/polly-$pkgver.src.tar.xz"
fi


_builddir="$srcdir"/build
_bootstrap_prefix="$srcdir"/bootstrap


_cmake_flags="\
	-DCMAKE_BUILD_TYPE=Release \
	-DCMAKE_VERBOSE_MAKEFILE=NO \
"

# the binutils include directory setting appears to be necessary in order to
# build the LLVMGold plugin, even if the headers are in /usr/include and easily
# detected.
# auto-detection of both go and ocaml are explicitly disabled here, as they
# currently do not compile.
_cmake_common_flags="\
	${_cmake_flags} \
	-DLLVM_DEFAULT_TARGET_TRIPLE=$CBUILD \
	-DLLVM_HOST_TRIPLE=$CHOST \
	-DLLVM_BINUTILS_INCDIR=/usr/include \
	-DLLVM_ENABLE_ASSERTIONS=NO \
	-DLLVM_ENABLE_LIBCXX=NO \
	-DLLVM_ENABLE_PIC=YES \
	-DLLVM_ENABLE_ZLIB=YES \
	-DLLVM_ENABLE_RTTI=YES \
	-DGO_EXECUTABLE=GO_EXECUTABLE-NOTFOUND \
	-DOCAMLFIND=OCAMLFIND-NOTFOUND \
	-DCLANG_BUILD_EXAMPLES=NO \
	-DLLVM_BUILD_EXAMPLES=NO \
	-DLLVM_INCLUDE_EXAMPLES=NO \
	-DLIBXML2_INCLUDE_DIR=/usr/include/libxml2 \
"

# attempt to build the bootstrap compiler as quickly as is sane. unfortunately,
# there is no way to turn off ObjC support. we can, however, disable building
# ARCMT (automatic reference counting migration tool), the static analyzer, and
# documentation. also, since we're using the cmake build and not autotools, the
# tests aren't automatically built (targets for testing are emitted, just not
# built as part of the default target).
_cmake_bootstrap_flags="\
	${_cmake_common_flags} \
	-DCMAKE_INSTALL_PREFIX=${_bootstrap_prefix} \
	-DLLVM_TARGETS_TO_BUILD=host \
	-DBUILD_SHARED_LIBS=NO \
	-DCLANG_ENABLE_ARCMT=NO \
	-DCLANG_ENABLE_STATIC_ANALYZER=NO \
	-DCLANG_INCLUDE_DOCS=NO \
	-DCLANG_PLUGIN_SUPPORT=NO \
	-DLLVM_ENABLE_CXX1Y=NO \
	-DLLVM_ENABLE_FFI=NO \
	-DLLVM_ENABLE_SPHINX=NO \
	-DLLVM_ENABLE_TERMINFO=NO \
	-DLLVM_INCLUDE_DOCS=NO \
	-DLLVM_EXTERNAL_CLANG_TOOLS_EXTRA_BUILD=NO \
	-DLLVM_EXTERNAL_POLLY_BUILD=NO \
"

# setting compiler-rt to compile as if it were an external build allows it to
# use the freshly built clang to compile, rather than the bootstrap compiler.
# NOTE: there appears to be an issue building compiler-rt as an external project
# and using ninja as the build tool, so stick to good old fashioned makefiles.
_cmake_final_flags="\
	${_cmake_common_flags} \
	-DCMAKE_INSTALL_PREFIX=/usr \
	-DLLVM_TARGETS_TO_BUILD=all \
	-DLLVM_BUILD_EXTERNAL_COMPILER_RT=YES \
	-DBUILD_SHARED_LIBS=YES \
	-DCLANG_PLUGIN_SUPPORT=YES \
	-DLINK_POLLY_INTO_TOOLS=YES \
	-DLLVM_BUILD_DOCS=YES \
	-DLLVM_BUILD_TESTS=YES \
	-DLLVM_ENABLE_CXX1Y=YES \
	-DLLVM_ENABLE_FFI=YES \
	-DLLVM_ENABLE_SPHINX=YES \
	-DLLVM_ENABLE_TERMINFO=YES \
	-DLIBCLANG_BUILD_STATIC=YES \
	-DWITH_POLLY=YES \
	-DPOLLY_ENABLE_GPGPU_CODEGEN=NO \
"


_srcdir="$srcdir"/"$pkgname-$pkgver.src"
_srcdir_clang="$_srcdir"/tools/clang
_srcdir_clang_extra="$_srcdir_clang"/tools/extra
_srcdir_polly="$_srcdir"/tools/polly
_srcdir_compiler_rt="$_srcdir"/projects/compiler-rt


prepare() {
	if [[ "${use_svn}" = "true" ]]; then
		pkgsvnver="tags/RELEASE_${pkgver//./}/final/"
		svn_source="http://llvm.org/svn/llvm-project"
		cd "$srcdir"
		svn co "$svn_source/llvm/$pkgsvnver" llvm-$pkgver.src
		svn co "$svn_source/cfe/$pkgsvnver" cfe-$pkgver.src
		svn co "$svn_source/clang-tools-extra/$pkgsvnver" clang-tools-extra-$pkgver.src
		svn co "$svn_source/polly/$pkgsvnver" polly-$pkgver.src
		svn co "$svn_source/compiler-rt/$pkgsvnver" compiler-rt-$pkgver.src
	fi


	msg "Preparing LLVM project sources..."
	mv "$srcdir"/cfe-$pkgver.src \
	  "$_srcdir_clang" || return 1
	mv "$srcdir"/clang-tools-extra-$pkgver.src \
	  "$_srcdir_clang_extra" || return 1
	mv "$srcdir"/polly-$pkgver.src \
	  "$_srcdir_polly" || return 1
	mv "$srcdir"/compiler-rt-$pkgver.src \
	  "$_srcdir_compiler_rt" || return 1


	msg "Patching LLVM core..."
	cd "$_srcdir" || return 1
	update_config_sub || return 1
	sed -i -e '/case "\${UNAME_MACHINE}:\${UNAME_SYSTEM}:\${UNAME_RELEASE}:\${UNAME_VERSION}" in/i \' \
	       -e 'if [ x != "x$CBUILD" ]; then echo "$CBUILD"; exit; fi' \
		./autoconf/config.guess || return 1
	for i in $source; do
		case $i in
		llvm-*.patch)
			msg "Applying $i..."
			patch -s -p1 -N -i "$srcdir"/$i || return 1
			;;
		esac
	done

	msg "Patching clang..."
	cd "$_srcdir_clang" || return 1
	# FIXME: I have never seen these tests pass on any system, be it vanilla clang
	# or patched, musl or glibc, autoconf or cmake. It fails on alpine, gentoo,
	# and ubuntu.
	# TODO: The version of this test in 3.7 works just fine. Re-enable for 3.7
	rm ./test/Driver/lto.c
	for i in $source; do
		case $i in
		clang-*.patch)
			msg "Applying $i..."
			patch -s -p1 -N -i "$srcdir"/$i || return 1
			;;
		esac
	done

	msg "Patching compiler-rt..."
	cd "$_srcdir_compiler_rt" || return 1
	for i in $source; do
		case $i in
		compiler-rt-*.patch)
			msg "Applying $i..."
			patch -s -p1 -N -i "$srcdir"/$i || return 1
			;;
		esac
	done
}

build() {
	# cmake is funky. it uses several flag related settings in addition to picking
	# up what's in the CFLAGS/CXXFLAGS env variables. to make using any abuild-set
	# flags sane, we pass them in as options to cmake and unset the environment
	# variables. we also back up the original flags so that we can tweak them
	# without losing the original setting (see below re: -fno-devirtualize).
	orig_cflags="${CFLAGS}"
	orig_cxxflags="${CXXFLAGS}"
	unset CFLAGS
	unset CXXFLAGS

	# just in case those were set to blank strings, we _really_ want to make sure
	# we're not building what will effectively be a -O0 build here...
	test -z "${orig_cflags}" && orig_cflags="-O3"
	test -z "${orig_cxxflags}" && orig_cxxflags="-O3"

	# -fno-devirtualize is added here because, to quote the fedora spec file,
	# "gcc has scary template-related bugs". the flag is removed post-bootstrap.
	# -DNDEBUG is required to disable assertions
	cflags="${orig_cflags} -DNDEBUG"
	cxxflags="${orig_cxxflags} -DNDEBUG -fno-devirtualize"

	# The cmake logic appears to use the result of config.guess in a few places
	# even though we override the various triple settings manually. export CBUILD
	# to the tweaked config.guess just to be safe.
	export CBUILD

	# cmake doesn't call out to pkg-config to determine the include path for FFI,
	# and since alpine installs the headers to a versioned directory cmake can't
	# auto-detect it by guessing either.
	ffi_include_dir="$(pkg-config --cflags-only-I libffi | sed 's|^-I||g')"


	mkdir -p "$_builddir"
	cd "$_builddir"

	msg "Compiling bootstrap compiler"
	cmake -G "Unix Makefiles" -Wno-dev ${_cmake_bootstrap_flags} \
		-DCMAKE_C_FLAGS_RELEASE="${cflags}" \
		-DCMAKE_CXX_FLAGS_RELEASE="${cxxflags}" \
		-DCMAKE_EXE_LINKER_FLAGS="${LDFLAGS}" \
		-DCMAKE_SHARED_LINKER_FLAGS="${LDFLAGS}" \
		-DFFI_INCLUDE_DIR="$ffi_include_dir" \
		"${_srcdir}" || return 1

	make || return 1

	paxmark m bin/llvm-rtdyld
	paxmark m bin/lli
	paxmark m bin/lli-child-target

	make install || return 1

	cflags="${orig_cflags} -DNDEBUG"
	cxxflags="${orig_cxxflags} -DNDEBUG"
	CC="${_bootstrap_prefix}/bin/clang"
	CXX="${_bootstrap_prefix}/bin/clang++"

	cd ..
	rm -rf "$_builddir"
	mkdir -p "$_builddir"
	cd "$_builddir"

	msg "Compiling final compiler"
	cmake -G "Unix Makefiles" -Wno-dev ${_cmake_final_flags} \
		-DCMAKE_C_COMPILER="${CC}" \
		-DCMAKE_CXX_COMPILER="${CXX}" \
		-DCMAKE_C_FLAGS_RELEASE="${cflags}" \
		-DCMAKE_CXX_FLAGS_RELEASE="${cxxflags}" \
		-DCMAKE_EXE_LINKER_FLAGS="${LDFLAGS}" \
		-DCMAKE_SHARED_LINKER_FLAGS="${LDFLAGS}" \
		-DFFI_INCLUDE_DIR="$ffi_include_dir" \
		"${_srcdir}" || return 1

	make || return 1

	paxmark m bin/llvm-rtdyld
	paxmark m bin/lli
	paxmark m bin/lli-child-target

	paxmark m unittests/ExecutionEngine/MCJIT/MCJITTests
	paxmark m unittests/Support/SupportTests

	make check-llvm 				|| return 1
	make check-clang 				|| return 1
	make check-compiler-rt 				|| return 1
	make check-polly 				|| return 1

	# 27 failures, all related to clang-tidy.
	# clang-format/clang-modernize and friends pass their test suites
	# make check-clang-tools || return 1
}

package() {
	cd "$_builddir"
	make DESTDIR="$pkgdir" install

	rm "$pkgdir"/usr/lib/LLVMHello.so

	file "$pkgdir"/usr/lib/*.so | awk -F: '$2~/ELF/{print $1}' | xargs -r chrpath -d
	file "$pkgdir"/usr/bin/* | awk -F: '$2~/ELF/{print $1}' | xargs -r chrpath -d
}

clang() {
	pkgdesc="A C language family front-end for LLVM"

	mkdir -p "$subpkgdir"/usr/bin \
		"$subpkgdir"/usr/lib "$subpkgdir"/usr/share/clang "$subpkgdir"/usr/include
	mv "$pkgdir"/usr/bin/*clang* \
		"$subpkgdir"/usr/bin/ || return 1
	mv "$pkgdir"/usr/lib/clang \
		"$pkgdir"/usr/lib/libclang* \
		"$pkgdir"/usr/lib/libmodernize* \
		"$subpkgdir"/usr/lib/ || return 1
	mv "$pkgdir"/usr/include/clang "$pkgdir"/usr/include/clang-c \
		"$subpkgdir"/usr/include/ || return 1

	cp -r "$_srcdir"/tools/clang/tools/scan-build "$subpkgdir"/usr/share/clang/scan-build
	cp -r "$_srcdir"/tools/clang/tools/scan-view "$subpkgdir"/usr/share/clang/scan-view

	ln -s /usr/share/clang/scan-build/scan-build "$subpkgdir"/usr/bin/scan-build
	ln -s /usr/share/clang/scan-view/scan-view "$subpkgdir"/usr/bin/scan-view
}

clang_doc() {
	pkgdesc="clang documentation"
	mkdir -p "$subpkgdir"/usr/share/doc/ || return 1
	mv "$pkgdir"/usr/share/doc/clang "$subpkgdir"/usr/share/doc/ || return 1
}

libs() {
	pkgdesc="LLVM shared libraries"
	mkdir -p "$subpkgdir"/usr/lib/
	mv "$pkgdir"/usr/lib/*.so "$subpkgdir"/usr/lib/
}

md5sums="0947294a8c83c8d7f857dfc16204c4eb  llvm-0001-fix-shared-build.patch
d10fc3574c560ccfae3eeacdc4a988f2  llvm-0002-musl-triple.patch
056178d87918d531f531b1b765a59e7c  llvm-0003-musl-hacks.patch
346081b2f0825ca7f491155c4b3ca0ea  compiler-rt-0001-musl-no-dlvsym.patch
eb3797555357896a92f74bf1bacfbdc2  compiler-rt-0002-musl-no-sanitizers.patch
8bc11d4a60af51a7fc10643bd0970d3a  compiler-rt-0003-off_t.patch
eab0123372fa909817ed21cfcffdbe16  clang-0001-fix-stdint.h.patch
069f5cd7a6d0b01eade62bb72aac9e8b  clang-0002-fix-unwind-header.patch
93ffbede80bc857c8ae6bed5ff016a52  clang-0003-add-alpine-linux-distro.patch
231fad6dc619ef6a54567c14082bf7af  clang-0004-alpine-use-z-relro.patch
2967fea7ed0624d99808bc091be1bab4  clang-0005-alpine-hash-style-gnu.patch
2848c592e5388069b7f4785085193078  clang-0006-musl-alpine-triple.patch
e24a82edcd6caa5e405ff67a45d6befc  clang-0007-musl-dynamic-linker-paths.patch
6bc4b7047042f9afec452a97c35c2cd5  clang-0008-alpine-PIE-by-default.patch
0ae0c5939c27750c52b39158fbc7a7a9  clang-0009-pass-host-triple-to-compiler-rt.patch
26831612243302f3ef964f355bf8c409  clang-0010-alpine-use-z-now.patch
308db990bb9c1c28152fdf18dddcb6eb  clang-0011-alpine-SSP-by-default.patch
ebf9e97be405ae126e134d3a357cd58a  llvm-3.6.1.src.tar.xz
9ff6811757735051f8651833b22ae014  cfe-3.6.1.src.tar.xz
1ad810536f0f7fefd4541a907aff83b3  clang-tools-extra-3.6.1.src.tar.xz
6f204b1feb324b1672ac907b32d927c0  compiler-rt-3.6.1.src.tar.xz
be80b9c2b6d5071c71bb47d79402b9da  polly-3.6.1.src.tar.xz"
sha256sums="4f75c2a76cf4c439d65c8e67511cd91c895edf8ccf003a5f94ffa07c29456296  llvm-0001-fix-shared-build.patch
3062c6135b12eab1ff365d1d609193723bb4c6ff3dfa9fcf76fe2b75948668c9  llvm-0002-musl-triple.patch
c6892c843b38c9a852367e5d76ffc29c21bdfd522adbc4c4e3e3c890a513c0db  llvm-0003-musl-hacks.patch
94f5626b4729afb39ad00a6cac4f8d44e3ee6f3d87362268bcd2c0ec637edc22  compiler-rt-0001-musl-no-dlvsym.patch
7dd2d22c61892eb651809649606fb3722520a5d12f8d88c2e96be977d0f8b71a  compiler-rt-0002-musl-no-sanitizers.patch
45bcfa7d1c757e32183c5cd95703f150ec3d1ed966a9cfa68b13b648e5310e78  compiler-rt-0003-off_t.patch
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3be240b78d2371728280ffb15191573c969b304ed784883b79c662ff73c2bc43  clang-0002-fix-unwind-header.patch
78449c4f7c9fdfaccef3b68039c69e7e041fb34862d39c803d7e6fac17f659aa  clang-0003-add-alpine-linux-distro.patch
501ab6e3fb99c9ffb82329475051a633797bf824c0dea437843266f190c062a0  clang-0004-alpine-use-z-relro.patch
1c4dbd1d474bf08de5979d6f4399aeba29de9ba8950aa0688d081d82e552d7d3  clang-0005-alpine-hash-style-gnu.patch
a7c3ab756cae110887dad315b8458212830949442a491618253c79eba754b546  clang-0006-musl-alpine-triple.patch
c7612168defefcb35cc8c988ff8b519aa983f07a62fd3b2c67f7d468459ca48a  clang-0007-musl-dynamic-linker-paths.patch
39c275490e3360d50fe339406992616fad0fa9127204c9b93578ee2403ae850c  clang-0008-alpine-PIE-by-default.patch
ec0c2014d455040499f599dc3d690fb92e54baf6058605be5f25c2c845629cfe  clang-0009-pass-host-triple-to-compiler-rt.patch
a34aca360fa52231b6c8663ee8b1103492f1c2600a08cc670616ce97d14e0ba9  clang-0010-alpine-use-z-now.patch
e8056b8fbf7dc0abc0c966c43642ffd72878453b04fa94c18bc7d92ee3e405f4  clang-0011-alpine-SSP-by-default.patch
2f00c615913aa0b56607ee1548936e60ad2aa89e6d56f23fb032a4463366fc7a  llvm-3.6.1.src.tar.xz
74f92d0c93b86678b015e87655f59474b2f657769680efdeb3c0524ffbd2dad7  cfe-3.6.1.src.tar.xz
f4ee70d870d550a9147ac6a548ce7daf7d9e6897348bf411f43c572966fb92b6  clang-tools-extra-3.6.1.src.tar.xz
fcbf610c77be6047f11ca10c4725610417beba832565115a9e2fcfe2897b649f  compiler-rt-3.6.1.src.tar.xz
d085f97bcbb4e47b51ed60ba9a55b3fee394193e7e48ab5c5b0035e6fc80a7eb  polly-3.6.1.src.tar.xz"
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0b8108c96948a1704275a93f3b872572fe2c61a0cd3e7f4caf63c0ca262cc079e2424b70f41d20f4a9aebe30333e39e3c594b4240fd41f7bd9a6682e751a23d9  clang-0003-add-alpine-linux-distro.patch
ac72ea29d6f889f2b54915b97d56bc388e849da2f524b872241053fa6bb9dde4eb6b1333813070e3671115121da34c22ff1e87aa19ce82a393166143b30c7de4  clang-0004-alpine-use-z-relro.patch
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e00a05f6a599b4686d6759c844f8283360a95bc6d1f171d4ab56ba7e17e017bc244f302ba2a4191a3e006bb8bc3b8d235de3624d423357fe30a3595d20bb9371  clang-0006-musl-alpine-triple.patch
c4365cbf9645e7aacbef2392cd7418c055a45e178e4ad956dfe45eafc90ab1db70ff620dfeeec11a4fab550ec557385f2d75f68adc0830ce74b5ece7077a3baf  clang-0007-musl-dynamic-linker-paths.patch
2a217800aefbce07017b793a8c91e174dac20546343de47749b4b07b4905db9a55411ef45e482b8df93cb4dbbdf25415202c3257be36ae095a6f2de11935f80b  clang-0008-alpine-PIE-by-default.patch
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