dev-cpp/benchmark: add 1.5.6

Have successfully made the ebuild run tests depending on dev-cpp/gtest
too, however since the required version of the latter is not in the tree
yet the committed ebuild has that bit disabled.

Signed-off-by: Marek Szuba <marecki@gentoo.org>

dev-cpp/benchmark/Manifest

@@ -1,2 +1,3 @@
 DIST benchmark-1.5.3.tar.gz 163465 BLAKE2B cea8929c5595be55e74e6232eb147a00c656cc5afe6f5b9d3d788de002c51c40c46012461a7c6840aff9e590ed4304f24a31249402bbbeae28ec443a433a2e53 SHA512 11f726686ad8b36870fc2a3542fad4c52a58df2eb580564dcfdfb154fe6ac00dbbf69c514395148d7ab11a45e40e869549cf971462c384f59cbae5fa60160e3b
 DIST benchmark-1.5.5.tar.gz 176710 BLAKE2B 394f8b34873ccd45100e3b1f58dd7819d443733d9224ff003a9410ca30d8bacc6c7736b74dd50623144767e840dbc3cd9ff819a60de6e22a00b1edaf802f0992 SHA512 91a2cdf0245625c657b9bb8d76c7d616a99eaed333e42b34ceff4e996b8fa6027b1c7313a815e7b441d2f6e2e1244c139a0911d585bf0d2e767ac3cea23a67d1
+DIST benchmark-1.5.6.tar.gz 177911 BLAKE2B ea4e98cb98471b2b8e2371109b96017bc483459dc924deaa1d9770b065de946ea2d69ca36098c27283f15370699f2475448af1e205cfca3d9c64408f08c202a9 SHA512 b3c1fd4407d660456ae51abd7c427460a2c7b029ab6344e21bb61d3ec84e3b60638b7a719655aa04fb9ca639b6371e553e9de18539aca8dd38c361b4c6522538

dev-cpp/benchmark/benchmark-1.5.6.ebuild

@@ -0,0 +1,36 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit cmake
+
+DESCRIPTION="A microbenchmark support library"
+HOMEPAGE="https://github.com/google/benchmark"
+SRC_URI="https://github.com/google/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~hppa ~ppc64 ~riscv ~x86"
+IUSE="debug test"
+
+RESTRICT="!test? ( test )"
+
+# Version not in the tree yet
+#BDEPEND="test? ( >=dev-cpp/gtest-1.11.0 )"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.5.6-system_testdeps.patch
+)
+
+src_configure() {
+	local mycmakeargs=(
+		-DBENCHMARK_ENABLE_TESTING=$(usex test)
+		-DBENCHMARK_ENABLE_GTEST_TESTS=OFF
+		-DBENCHMARK_ENABLE_ASSEMBLY_TESTS=OFF
+	)
+
+	use debug || append-cppflags -DNDEBUG
+
+	cmake_src_configure
+}

dev-cpp/benchmark/files/benchmark-1.5.6-system_testdeps.patch

@@ -0,0 +1,11 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -307,7 +307,7 @@
+   if (BENCHMARK_ENABLE_GTEST_TESTS AND
+       NOT (TARGET gtest AND TARGET gtest_main AND
+            TARGET gmock AND TARGET gmock_main))
+-    include(GoogleTest)
++    find_package(GTest 1.11 REQUIRED)
+   endif()
+   add_subdirectory(test)
+ endif()