[gentoo-dev] [PATCH 2/3] Introduce cmake-multilib wrapper for cmake-utils.

[Michał Górny]

---
 gx86/eclass/cmake-multilib.eclass | 83 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 gx86/eclass/cmake-multilib.eclass

diff --git a/gx86/eclass/cmake-multilib.eclass b/gx86/eclass/cmake-multilib.eclass
new file mode 100644
index 0000000..9f41e5c
--- /dev/null
+++ b/gx86/eclass/cmake-multilib.eclass
@@ -0,0 +1,83 @@
+# Copyright 1999-2013 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/cmake-multilib.eclass,v 1.8 2013/02/01 21:39:50 mgorny Exp $
+
+# @ECLASS: cmake-multilib.eclass
+# @MAINTAINER:
+# Michał Górny <mgorny@g.o>
+# @BLURB: cmake-utils wrapper for multilib builds
+# @DESCRIPTION:
+# The cmake-multilib.eclass is a cmake-utils.eclass(5) wrapper
+# introducing support for building for more than one ABI (multilib).
+#
+# Inheriting this eclass sets IUSE and exports cmake-utils phase
+# function wrappers which build the package for each supported ABI
+# if the appropriate flag is enabled.
+#
+# Note that the multilib support requires out-of-source builds to be
+# enabled. Thus, it is impossible to use CMAKE_IN_SOURCE_BUILD with
+# it.
+
+# EAPI=5 is required for meaningful MULTILIB_USEDEP.
+case ${EAPI:-0} in
+	5) ;;
+	*) die "EAPI=${EAPI} is not supported" ;;
+esac
+
+if [[ ${CMAKE_IN_SOURCE_BUILD} ]]; then
+	die "${ECLASS}: multilib support requires out-of-source builds."
+fi
+
+inherit cmake-utils multilib-build
+
+EXPORT_FUNCTIONS src_configure src_compile src_test src_install
+
+cmake-multilib_src_configure() {
+	multilib_parallel_foreach_abi cmake-utils_src_configure
+}
+
+cmake-multilib_src_compile() {
+	multilib_foreach_abi cmake-utils_src_compile
+}
+
+cmake-multilib_src_test() {
+	multilib_foreach_abi cmake-utils_src_test
+}
+
+cmake-multilib_src_install() {
+	cmake-multilib_secure_install() {
+		cmake-utils_src_install
+
+		# Make sure all headers are the same for each ABI.
+		cmake-multilib_cksum() {
+			find "${ED}"usr/include -type f \
+				-exec cksum {} + | sort -k2
+		}
+
+		local cksum=$(cmake-multilib_cksum)
+		local cksum_file=${T}/.cmake-multilib_cksum
+
+		if [[ -f ${cksum_file} ]]; then
+			local cksum_prev=$(< "${cksum_file}")
+
+			if [[ ${cksum} != ${cksum_prev} ]]; then
+				echo "${cksum}" > "${cksum_file}.new"
+
+				eerror "Header files have changed between ABIs."
+
+				if type -p diff &>/dev/null; then
+					eerror "$(diff -du "${cksum_file}" "${cksum_file}.new")"
+				else
+					eerror "Old checksums in: ${cksum_file}"
+					eerror "New checksums in: ${cksum_file}.new"
+				fi
+
+				die "Header checksum mismatch, aborting."
+			fi
+		else
+			echo "${cksum}" > "${cksum_file}"
+		fi
+	}
+
+	multilib_foreach_abi cmake-multilib_secure_install
+}
-- 
1.8.1.2