From 2018227e9344edb9da15fc6a4a8298086cc2aa77 Mon Sep 17 00:00:00 2001
From: V3n3RiX <venerix@redcorelinux.org>
Date: Sun, 2 Jun 2019 21:45:28 +0100
Subject: gentoo resync : 02.06.2019

---
 eclass/llvm.eclass | 69 +++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 55 insertions(+), 14 deletions(-)

(limited to 'eclass/llvm.eclass')

diff --git a/eclass/llvm.eclass b/eclass/llvm.eclass
index ca10e742f1b1..d61effb5e9c6 100644
--- a/eclass/llvm.eclass
+++ b/eclass/llvm.eclass
@@ -6,7 +6,7 @@
 # Michał Górny <mgorny@gentoo.org>
 # @AUTHOR:
 # Michał Górny <mgorny@gentoo.org>
-# @SUPPORTED_EAPIS: 6
+# @SUPPORTED_EAPIS: 6 7
 # @BLURB: Utility functions to build against slotted LLVM
 # @DESCRIPTION:
 # The llvm.eclass provides utility functions that can be used to build
@@ -17,20 +17,21 @@
 # a proper dependency string yourself to guarantee that appropriate
 # version of LLVM is installed.
 #
-# Example use for a package supporting LLVM 3.8 to 5:
+# Example use for a package supporting LLVM 5 to 7:
 # @CODE
 # inherit cmake-utils llvm
 #
 # RDEPEND="
-#	<sys-devel/llvm-6_rc:=
+#	<sys-devel/llvm-8:=
 #	|| (
+#		sys-devel/llvm:7
+#		sys-devel/llvm:6
 #		sys-devel/llvm:5
-#		sys-devel/llvm:4
-#		>=sys-devel/llvm-3.8:0
 #	)
 # "
+# DEPEND=${RDEPEND}
 #
-# LLVM_MAX_SLOT=5
+# LLVM_MAX_SLOT=7
 #
 # # only if you need to define one explicitly
 # pkg_setup() {
@@ -46,11 +47,12 @@
 # # note: do not use := on both clang and llvm, it can match different
 # # slots then. clang pulls llvm in, so we can skip the latter.
 # RDEPEND="
-#	>=sys-devel/clang-4:=[llvm_targets_AMDGPU(+)]
+#	>=sys-devel/clang-6:=[llvm_targets_AMDGPU(+)]
 # "
+# DEPEND=${RDEPEND}
 #
 # llvm_check_deps() {
-#	has_version "sys-devel/clang:${LLVM_SLOT}[llvm_targets_AMDGPU(+)]"
+#	has_version -d "sys-devel/clang:${LLVM_SLOT}[llvm_targets_AMDGPU(+)]"
 # }
 # @CODE
 
@@ -58,7 +60,7 @@ case "${EAPI:-0}" in
 	0|1|2|3|4|5)
 		die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}"
 		;;
-	6)
+	6|7)
 		;;
 	*)
 		die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
@@ -82,11 +84,19 @@ if [[ ! ${_LLVM_ECLASS} ]]; then
 declare -g -r _LLVM_KNOWN_SLOTS=( 9 8 7 6 5 4 )
 
 # @FUNCTION: get_llvm_prefix
-# @USAGE: [<max_slot>]
+# @USAGE: [-b|-d] [<max_slot>]
 # @DESCRIPTION:
 # Find the newest LLVM install that is acceptable for the package,
 # and print an absolute path to it.
 #
+# If -b is specified, the checks are performed relative to BROOT,
+# and BROOT-path is returned.  This is appropriate when your package
+# calls llvm-config executable.  -b is supported since EAPI 7.
+#
+# If -d is specified, the checks are performed relative to ESYSROOT,
+# and ESYSROOT-path is returned.  This is appropriate when your package
+# uses CMake find_package(LLVM).  -d is the default.
+#
 # If <max_slot> is specified, then only LLVM versions that are not newer
 # than <max_slot> will be considered. Otherwise, all LLVM versions would
 # be considered acceptable. The function does not support specifying
@@ -103,6 +113,37 @@ declare -g -r _LLVM_KNOWN_SLOTS=( 9 8 7 6 5 4 )
 get_llvm_prefix() {
 	debug-print-function ${FUNCNAME} "${@}"
 
+	local hv_switch=-d
+	while [[ ${1} == -* ]]; do
+		case ${1} in
+			-b|-d) hv_switch=${1};;
+			*) break;;
+		esac
+		shift
+	done
+
+	local prefix=
+	if [[ ${EAPI} != 6 ]]; then
+		case ${hv_switch} in
+			-b)
+				prefix=${BROOT}
+				;;
+			-d)
+				prefix=${ESYSROOT}
+				;;
+		esac
+	else
+		case ${hv_switch} in
+			-b)
+				die "${FUNCNAME} -b is not supported in EAPI ${EAPI}"
+				;;
+			-d)
+				prefix=${EPREFIX}
+				hv_switch=
+				;;
+		esac
+	fi
+
 	local max_slot=${1}
 	local slot
 	for slot in "${_LLVM_KNOWN_SLOTS[@]}"; do
@@ -120,10 +161,10 @@ get_llvm_prefix() {
 			llvm_check_deps || continue
 		else
 			# check if LLVM package is installed
-			has_version "sys-devel/llvm:${slot}" || continue
+			has_version ${hv_switch} "sys-devel/llvm:${slot}" || continue
 		fi
 
-		echo "${EPREFIX}/usr/lib/llvm/${slot}"
+		echo "${prefix}/usr/lib/llvm/${slot}"
 		return
 	done
 
@@ -134,8 +175,8 @@ get_llvm_prefix() {
 
 	# fallback to :0
 	# assume it's always <= 4 (the lower max_slot allowed)
-	if has_version "sys-devel/llvm:0"; then
-		echo "${EPREFIX}/usr"
+	if has_version ${hv_switch} "sys-devel/llvm:0"; then
+		echo "${prefix}/usr"
 		return
 	fi
 
-- 
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