dev-cpp/abseil-cpp: Fix build with nvidia cuda11.6

also update EAPI 7 -> 8

Signed-off-by: Jason Zaman <perfinion@gentoo.org>

dev-cpp/abseil-cpp/abseil-cpp-20211102.0-r2.ebuild

@@ -0,0 +1,73 @@
+# Copyright 2020-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..10} )
+
+inherit cmake python-any-r1
+
+# yes, it needs SOURCE, not just installed one
+# and no, 1.11.0 is not enough
+GTEST_COMMIT="1b18723e874b256c1e39378c6774a90701d70f7a"
+GTEST_FILE="gtest-${GTEST_COMMIT}.tar.gz"
+
+DESCRIPTION="Abseil Common Libraries (C++), LTS Branch"
+HOMEPAGE="https://abseil.io"
+SRC_URI="https://github.com/abseil/abseil-cpp/archive/${PV}.tar.gz -> ${P}.tar.gz
+	test? ( https://github.com/google/googletest/archive/${GTEST_COMMIT}.tar.gz -> ${GTEST_FILE} )"
+
+LICENSE="
+	Apache-2.0
+	test? ( BSD )
+"
+SLOT="0/${PV%%.*}"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~riscv ~x86"
+IUSE="test"
+
+DEPEND=""
+RDEPEND="${DEPEND}"
+
+BDEPEND="
+	${PYTHON_DEPS}
+	test? ( sys-libs/timezone-data )
+"
+
+RESTRICT="!test? ( test )"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-20211102.0-fix-cuda-nvcc-build.patch"
+	"${FILESDIR}/${PN}-20211102.0-r2-cuda11.6-compile-fix.patch"
+)
+
+src_prepare() {
+	cmake_src_prepare
+
+	# un-hardcode abseil compiler flags
+	sed -i \
+		-e '/"-maes",/d' \
+		-e '/"-msse4.1",/d' \
+		-e '/"-mfpu=neon"/d' \
+		-e '/"-march=armv8-a+crypto"/d' \
+		absl/copts/copts.py || die
+
+	# now generate cmake files
+	python_fix_shebang absl/copts/generate_copts.py
+	absl/copts/generate_copts.py || die
+
+	if use test; then
+		sed -i 's/-Werror//g' \
+			"${WORKDIR}/googletest-${GTEST_COMMIT}"/googletest/cmake/internal_utils.cmake || die
+	fi
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DABSL_ENABLE_INSTALL=TRUE
+		-DABSL_LOCAL_GOOGLETEST_DIR="${WORKDIR}/googletest-${GTEST_COMMIT}"
+		-DCMAKE_CXX_STANDARD=17
+		-DABSL_PROPAGATE_CXX_STD=TRUE
+		$(usex test -DBUILD_TESTING=ON '') #intentional usex
+	)
+	cmake_src_configure
+}

dev-cpp/abseil-cpp/files/abseil-cpp-20211102.0-r2-cuda11.6-compile-fix.patch

@@ -0,0 +1,24 @@
+diff --git a/absl/strings/internal/string_constant.h b/absl/strings/internal/string_constant.h
+index a11336b..e1596b1 100644
+--- a/absl/strings/internal/string_constant.h
++++ b/absl/strings/internal/string_constant.h
+@@ -35,12 +35,18 @@ namespace strings_internal {
+ // below.
+ template <typename T>
+ struct StringConstant {
++ private:
++  static constexpr bool ValidateConstant(absl::string_view view) {
++    return view.empty() || 2 * view[0] != 1;
++  }
++
++public:
+   static constexpr absl::string_view value = T{}();
+   constexpr absl::string_view operator()() const { return value; }
+ 
+   // Check to be sure `view` points to constant data.
+   // Otherwise, it can't be constant evaluated.
+-  static_assert(value.empty() || 2 * value[0] != 1,
++  static_assert(ValidateConstant(value),
+                 "The input string_view must point to constant data.");
+ };
+