dev-cpp/magic_enum: add 0.9.7

Thanks to Arniiiii for pursuing this upstream wrt bug #933479. I've
also taken the opportunity to make examples conditional on USE as
it's a header-only library otherwise and nothing needs to be built
(ofc excluding tests).

Closes: https://bugs.gentoo.org/933479
Signed-off-by: Sam James <sam@gentoo.org>

dev-cpp/magic_enum/Manifest

@@ -1,2 +1,3 @@
 DIST magic_enum-0.9.5.tar.gz 198269 BLAKE2B c3c6bbf6c5d366813dac7df5fbfc48f414cf4235d842ef3a5a2fd8f2c2857e55243b7fbf7000d598e778fc8d2d54c7d6e34f8a97fa2eaf510572bf53f17500a6 SHA512 f1b412d15e0ef624b4588adba00a18ed12eeb1f0dabc021d53a7c047b8976ecb07701b76040f47c77c75e00151619dbce1f9a75f471db04340156a39044768f3
 DIST magic_enum-0.9.6.tar.gz 199883 BLAKE2B 32909c5ea0cff32b14fb4fd5507f1f99cd45f572d56fd14f76aea3ca3c1fa16d08573568a7c7f9a3efbc9396450b2e897aa64de414b34a4c19b6c49f63aed506 SHA512 6154c816446e115f3b164df79ab8d8088eb76b632ee3fdc82ea17cc7ae8d04652c83e5cc587c2c4b334889904b101ba08a04c5837103af260768e93df17cc263
+DIST magic_enum-0.9.7.tar.gz 202916 BLAKE2B c084df420d66b4920ef028c74056a64e6221d787bbdc958407426442bc14f9a62ec32c56aa7e914a79f4e10a231312fc03230a6d4cbed992f6eae51e14372283 SHA512 8b61c621ff2a6981b4ff89f7df577091ffc9382d443c061db612fb61822dbf6ef8aba69ea35d1c435dcffbd7434cb4ccc5d12bbe2deba1cf0a5316c979ee6a4b

dev-cpp/magic_enum/files/magic_enum-0.9.7-werror.patch

@@ -0,0 +1,22 @@
+--- a/example/CMakeLists.txt
++++ b/example/CMakeLists.txt
+@@ -2,7 +2,7 @@ include(CheckCXXCompilerFlag)
+ 
+ set(CMAKE_CXX_STANDARD 17)
+ if((CMAKE_CXX_COMPILER_ID MATCHES "GNU") OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
+-    set(OPTIONS -Wall -Wextra -Wshadow -pedantic-errors -Werror)
++    set(OPTIONS -Wall -Wextra)
+ elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+     set(OPTIONS /W4 /WX)
+     if(HAS_PERMISSIVE_FLAG)
+--- a/test/CMakeLists.txt
++++ b/test/CMakeLists.txt
+@@ -56,7 +56,7 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+   check_cxx_compiler_flag(/std:c++latest HAS_CPPLATEST_FLAG)
+ elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+   set(CMAKE_VERBOSE_MAKEFILE ON)
+-  set(OPTIONS -Wall -Wextra -Wshadow -pedantic-errors -Werror)
++  set(OPTIONS -Wall -Wextra -Wshadow)
+ 
+   check_cxx_compiler_flag(-std=c++20 HAS_CPP20_FLAG)
+   check_cxx_compiler_flag(-std=c++23 HAS_CPP23_FLAG)

dev-cpp/magic_enum/magic_enum-0.9.7.ebuild

@@ -0,0 +1,33 @@
+# Copyright 2023-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# As of 0.8.2, it has meson, but only for subproject use(?)
+# Doesn't install anything. In 0.9.7, the situation looks better, but
+# need to test with reverse dependencies.
+inherit cmake
+
+DESCRIPTION="Static reflection for enums in header-only C++"
+HOMEPAGE="https://github.com/Neargye/magic_enum"
+SRC_URI="https://github.com/Neargye/magic_enum/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86"
+IUSE="examples test"
+RESTRICT="!test? ( test )"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.9.7-werror.patch
+)
+
+src_configure() {
+	local mycmakeargs=(
+		-DMAGIC_ENUM_OPT_BUILD_EXAMPLES=$(usex examples)
+		-DMAGIC_ENUM_OPT_BUILD_TESTS=$(usex test)
+		-DMAGIC_ENUM_OPT_INSTALL=ON
+	)
+
+	cmake_src_configure
+}