Upgraded spdlog dependency to 1.12

The spdlog library introduced some non-backward-compatible changes
between version 1.9.2 (packaged with Ubuntu 22.04) and version 1.12
(packaged with Ubuntu 24.04). Specifically, standard library containers
are only log-printable if the new header <spdlog/fmt/ranges.h> is
included, and user-defined types are only log-printable if they
explicitly specialize fmt::formatter<T> (including <spdlog/fmt/ostr.h>
is no longer sufficient).

CMakeLists.txt

@@ -48,7 +48,7 @@ find_package(mutils REQUIRED)
 find_package(mutils-containers REQUIRED)
 
 # Target: spdlog::spdlog
-find_package(spdlog 1.3.1...1.9.2 REQUIRED)
+find_package(spdlog 1.12.0 REQUIRED)
 
 # Target: OpenSSL::Crypto and OpenSSL::ssl
 find_package(OpenSSL 1.1.1 REQUIRED)

include/derecho/utils/logger.hpp

@@ -9,6 +9,7 @@
 #include <atomic>
 #include <spdlog/spdlog.h>
 #include <spdlog/fmt/ostr.h>
+#include <spdlog/fmt/ranges.h>
 #include <spdlog/sinks/rotating_file_sink.h>
 #include <spdlog/sinks/stdout_color_sinks.h>
 

src/applications/tests/unit_tests/client_callback_mockup.hpp

@@ -76,6 +76,9 @@ enum class ClientCallbackType {
 
 std::ostream& operator<<(std::ostream& os, const ClientCallbackType& cb_type);
 
+template <>
+struct fmt::formatter<ClientCallbackType> : fmt::ostream_formatter {};
+
 /**
  * Structure used by StorageNode to pass callback requests from the
  * register_callback RPC function to the callback-sending thread.