From ec4b14a0bf47f438ea97d0e601935992ab23b4df Mon Sep 17 00:00:00 2001
From: =?utf8?q?Micha=C5=82=20G=C3=B3rny?= <mgorny@gentoo.org>
Date: Mon, 30 Jan 2017 09:02:05 +0100
Subject: [PATCH] sys-libs/compiler-rt: Add slotted version

Introduce a slotted variant of compiler-rt libraries with the slot
matching the clang version. This will make it possible to install a new
compiler-rt version before upgrading clang to the corresponding version,
therefore preserving a working compiler through (even minor) clang
upgrades.

The alternative was to replace the complete version number with the
major version in the runtime directory path. However, software (e.g.
Mesa) hardcodes the default path and therefore breaks when it is
changed.
---
 ...ebuild => compiler-rt-4.0.0_rc1-r1.ebuild} | 36 +++++++------------
 sys-libs/compiler-rt/compiler-rt-9999.ebuild  | 36 +++++++------------
 2 files changed, 26 insertions(+), 46 deletions(-)
 rename sys-libs/compiler-rt/{compiler-rt-4.0.0_rc1.ebuild => compiler-rt-4.0.0_rc1-r1.ebuild} (76%)

diff --git a/sys-libs/compiler-rt/compiler-rt-4.0.0_rc1.ebuild b/sys-libs/compiler-rt/compiler-rt-4.0.0_rc1-r1.ebuild
similarity index 76%
rename from sys-libs/compiler-rt/compiler-rt-4.0.0_rc1.ebuild
rename to sys-libs/compiler-rt/compiler-rt-4.0.0_rc1-r1.ebuild
index 49f12b097ebb..43560c2edd59 100644
--- a/sys-libs/compiler-rt/compiler-rt-4.0.0_rc1.ebuild
+++ b/sys-libs/compiler-rt/compiler-rt-4.0.0_rc1-r1.ebuild
@@ -17,16 +17,16 @@ HOMEPAGE="http://llvm.org/"
 SRC_URI="http://www.llvm.org/pre-releases/${PV/_//}/${P/_/}.src.tar.xz"
 
 LICENSE="|| ( UoI-NCSA MIT )"
-SLOT="0/${PV%.*}"
+SLOT="${PV%_*}"
 KEYWORDS="~amd64 ~arm64 ~x86"
 IUSE="test"
 
-RDEPEND="
-	!<sys-devel/llvm-4"
+LLVM_SLOT=${SLOT%%.*}
+RDEPEND="!=sys-libs/compiler-rt-${SLOT}*:0"
 # llvm-4 needed for --cmakedir
-DEPEND="${RDEPEND}
+DEPEND="
 	>=sys-devel/llvm-4
-	test? ( ~sys-devel/clang-${PV} )
+	test? ( =sys-devel/clang-${PV%_*}*:${LLVM_SLOT} )
 	${PYTHON_DEPS}"
 
 S=${WORKDIR}/${P/_/}.src
@@ -51,14 +51,11 @@ src_configure() {
 		fi
 	fi
 
-	local llvm_version=$(llvm-config --version) || die
-	local clang_version=$(get_version_component_range 1-3 "${llvm_version}")
-	local libdir=$(get_libdir)
 	local mycmakeargs=(
-		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${clang_version}"
+		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${SLOT}"
 		# use a build dir structure consistent with install
 		# this makes it possible to easily deploy test-friendly clang
-		-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${clang_version}"
+		-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${SLOT}"
 
 		# currently lit covers only sanitizer tests
 		-DCOMPILER_RT_INCLUDE_TESTS=OFF
@@ -69,22 +66,15 @@ src_configure() {
 	cmake-utils_src_configure
 }
 
-run_tests_for_abi() {
-	local ABI=${1}
-}
-
 src_test() {
 	# prepare a test compiler
-	local llvm_version=$(llvm-config --version) || die
-	local clang_version=$(get_version_component_range 1-3 "${llvm_version}")
-
 	# copy clang over since resource_dir is located relatively to binary
 	# therefore, we can put our new libraries in it
-	mkdir -p "${BUILD_DIR}"/{bin,$(get_libdir),lib/clang/"${clang_version}"/include} || die
-	cp "${EPREFIX}/usr/bin/clang" "${EPREFIX}/usr/bin/clang++" \
-		"${BUILD_DIR}"/bin/ || die
-	cp "${EPREFIX}/usr/lib/clang/${clang_version}/include"/*.h \
-		"${BUILD_DIR}/lib/clang/${clang_version}/include/" || die
+	mkdir -p "${BUILD_DIR}"/lib/{llvm/${LLVM_SLOT}{/bin,$(get_libdir)},clang/${SLOT}/include} || die
+	cp "${EPREFIX}"/usr/lib/llvm/${LLVM_SLOT}/bin/clang{,++} \
+		"${BUILD_DIR}"/lib/llvm/${LLVM_SLOT}/bin/ || die
+	cp "${EPREFIX}/usr/lib/clang/${SLOT}/include"/*.h \
+		"${BUILD_DIR}/lib/clang/${SLOT}/include/" || die
 
 	# builtins are not converted to lit yet, so run them manually
 	local tests=() f
@@ -120,7 +110,7 @@ src_test() {
 		einfo "Running tests for ABI=${ABI}"
 		# use -k to run all tests even if some fail
 		emake -k \
-			CC="${BUILD_DIR}/bin/clang" \
+			CC="${BUILD_DIR}/lib/llvm/${LLVM_SLOT}/bin/clang" \
 			CFLAGS="$(get_abi_CFLAGS)" \
 			CPPFLAGS='-I../../../lib/builtins' \
 			LDFLAGS='-rtlib=compiler-rt' \
diff --git a/sys-libs/compiler-rt/compiler-rt-9999.ebuild b/sys-libs/compiler-rt/compiler-rt-9999.ebuild
index 4f6d080ee475..450177ae5cf7 100644
--- a/sys-libs/compiler-rt/compiler-rt-9999.ebuild
+++ b/sys-libs/compiler-rt/compiler-rt-9999.ebuild
@@ -19,16 +19,16 @@ EGIT_REPO_URI="http://llvm.org/git/compiler-rt.git
 	https://github.com/llvm-mirror/compiler-rt.git"
 
 LICENSE="|| ( UoI-NCSA MIT )"
-SLOT="0/${PV%.*}"
+# Note: this needs to be updated to match version of clang-9999
+SLOT="5.0.0"
 KEYWORDS=""
 IUSE="test"
 
-RDEPEND="
-	!<sys-devel/llvm-4"
+LLVM_SLOT=${SLOT%%.*}
 # llvm-4 needed for --cmakedir
-DEPEND="${RDEPEND}
+DEPEND="
 	>=sys-devel/llvm-4
-	test? ( ~sys-devel/clang-${PV} )
+	test? ( =sys-devel/clang-${PV%_*}*:${LLVM_SLOT} )
 	${PYTHON_DEPS}"
 
 # least intrusive of all
@@ -51,14 +51,11 @@ src_configure() {
 		fi
 	fi
 
-	local llvm_version=$(llvm-config --version) || die
-	local clang_version=$(get_version_component_range 1-3 "${llvm_version}")
-	local libdir=$(get_libdir)
 	local mycmakeargs=(
-		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${clang_version}"
+		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${SLOT}"
 		# use a build dir structure consistent with install
 		# this makes it possible to easily deploy test-friendly clang
-		-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${clang_version}"
+		-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${SLOT}"
 
 		# currently lit covers only sanitizer tests
 		-DCOMPILER_RT_INCLUDE_TESTS=OFF
@@ -69,22 +66,15 @@ src_configure() {
 	cmake-utils_src_configure
 }
 
-run_tests_for_abi() {
-	local ABI=${1}
-}
-
 src_test() {
 	# prepare a test compiler
-	local llvm_version=$(llvm-config --version) || die
-	local clang_version=$(get_version_component_range 1-3 "${llvm_version}")
-
 	# copy clang over since resource_dir is located relatively to binary
 	# therefore, we can put our new libraries in it
-	mkdir -p "${BUILD_DIR}"/{bin,$(get_libdir),lib/clang/"${clang_version}"/include} || die
-	cp "${EPREFIX}/usr/bin/clang" "${EPREFIX}/usr/bin/clang++" \
-		"${BUILD_DIR}"/bin/ || die
-	cp "${EPREFIX}/usr/lib/clang/${clang_version}/include"/*.h \
-		"${BUILD_DIR}/lib/clang/${clang_version}/include/" || die
+	mkdir -p "${BUILD_DIR}"/lib/{llvm/${LLVM_SLOT}{/bin,$(get_libdir)},clang/${SLOT}/include} || die
+	cp "${EPREFIX}"/usr/lib/llvm/${LLVM_SLOT}/bin/clang{,++} \
+		"${BUILD_DIR}"/lib/llvm/${LLVM_SLOT}/bin/ || die
+	cp "${EPREFIX}/usr/lib/clang/${SLOT}/include"/*.h \
+		"${BUILD_DIR}/lib/clang/${SLOT}/include/" || die
 
 	# builtins are not converted to lit yet, so run them manually
 	local tests=() f
@@ -120,7 +110,7 @@ src_test() {
 		einfo "Running tests for ABI=${ABI}"
 		# use -k to run all tests even if some fail
 		emake -k \
-			CC="${BUILD_DIR}/bin/clang" \
+			CC="${BUILD_DIR}/lib/llvm/${LLVM_SLOT}/bin/clang" \
 			CFLAGS="$(get_abi_CFLAGS)" \
 			CPPFLAGS='-I../../../lib/builtins' \
 			LDFLAGS='-rtlib=compiler-rt' \
-- 
2.26.2