dev-libs/spdlog: fix build w/ libfmt-11.1.0

Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/spdlog/files/spdlog-1.15.0-libfmt-11.1.0.patch

@@ -0,0 +1,35 @@
+https://github.com/gabime/spdlog/pull/3301
+
+From e693420a38b58d29a56b3ea921e15b175a5f2843 Mon Sep 17 00:00:00 2001
+From: Rui Chen <rui@chenrui.dev>
+Date: Wed, 25 Dec 2024 19:00:36 -0500
+Subject: [PATCH] fix: update to_string_view function for fmt 11.1
+
+Signed-off-by: Rui Chen <rui@chenrui.dev>
+---
+ include/spdlog/common.h | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/include/spdlog/common.h b/include/spdlog/common.h
+index aca483c20..2d73f8300 100644
+--- a/include/spdlog/common.h
++++ b/include/spdlog/common.h
+@@ -365,10 +365,17 @@ SPDLOG_CONSTEXPR_FUNC spdlog::wstring_view_t to_string_view(spdlog::wstring_view
+ #endif
+ 
+ #ifndef SPDLOG_USE_STD_FORMAT
++#if FMT_VERSION >= 110100
++template <typename T, typename... Args>
++inline fmt::basic_string_view<T> to_string_view(fmt::basic_format_arg<T> fmt) {
++    return fmt;
++}
++#else
+ template <typename T, typename... Args>
+ inline fmt::basic_string_view<T> to_string_view(fmt::basic_format_string<T, Args...> fmt) {
+     return fmt;
+ }
++#endif
+ #elif __cpp_lib_format >= 202207L
+ template <typename T, typename... Args>
+ SPDLOG_CONSTEXPR_FUNC std::basic_string_view<T> to_string_view(
+

dev-libs/spdlog/spdlog-1.15.0.ebuild

@@ -34,6 +34,7 @@ RDEPEND="${DEPEND}"
 
 PATCHES=(
 	"${FILESDIR}/${PN}-force_external_fmt.patch"
+	"${FILESDIR}/${PN}-1.15.0-libfmt-11.1.0.patch"
 )
 
 multilib_src_prepare() {