fix: resolve all Corrade cci.20250327 compatibility issues for macOS build

- pluginSearchPaths() must return non-empty Array<String> (at least one
  entry) when dynamic plugin support is enabled; use Array<String>{1}
  to match the old std::vector<std::string>{""} behavior
- Add CORRADE_AUTOMATIC_INITIALIZER include in static_plugins.h headers
  (macro moved to Corrade/Utility/Macros.h in new version)
- Fix CoreRegistry.cpp: use try_emplace instead of insert for
  std::unique_ptr values; include PointerStl.h for Corrade Pointer
  to std::unique_ptr conversion
- Override CMAKE_OSX_SYSROOT after Conan toolchain re-include to fix
  '-isysroot macosx' invalid path issue on non-Xcode generators

All 18 unit tests pass.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: leoparente

CMakeLists.txt

@@ -73,6 +73,24 @@ if(_conan_generators AND EXISTS "${_conan_generators}/conan_toolchain.cmake")
 endif()
 unset(_conan_generators)
 
+# On macOS with non-Xcode generators (e.g. Unix Makefiles), Conan sets
+# CMAKE_OSX_SYSROOT to the shortname 'macosx' which only Xcode resolves.
+# Clang requires the full SDK path. We override here, after the conan toolchain
+# re-include above (which resets the value via FORCE).
+if(APPLE AND NOT CMAKE_GENERATOR MATCHES "Xcode")
+    execute_process(
+        COMMAND xcrun --sdk macosx --show-sdk-path
+        OUTPUT_VARIABLE _VISOR_MACOS_SDK_PATH
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        ERROR_QUIET
+    )
+    if(_VISOR_MACOS_SDK_PATH)
+        set(CMAKE_OSX_SYSROOT "${_VISOR_MACOS_SDK_PATH}" CACHE STRING "macOS SDK path" FORCE)
+        message(STATUS "visor: macOS SDK path: ${CMAKE_OSX_SYSROOT}")
+    endif()
+    unset(_VISOR_MACOS_SDK_PATH)
+endif()
+
 include(sanitizer)
 if(CODE_COVERAGE)
     include(CodeCoverage)

src/AbstractPlugin.h

@@ -73,7 +73,7 @@ class AbstractPlugin : public Corrade::PluginManager::AbstractPlugin
 public:
     static Corrade::Containers::Array<Corrade::Containers::String> pluginSearchPaths()
     {
-        return {};
+        return Corrade::Containers::Array<Corrade::Containers::String>{1};
     }
 
     explicit AbstractPlugin(Corrade::PluginManager::AbstractManager &manager, const std::string &plugin)

src/CoreRegistry.cpp

@@ -9,6 +9,7 @@
 #include "Policies.h"
 #include "Taps.h"
 #include "CorradeCompat.h"
+#include <Corrade/Containers/PointerStl.h>
 #include <Corrade/Utility/ConfigurationGroup.h>
 #include <spdlog/sinks/stdout_color_sinks.h>
 #include <spdlog/spdlog.h>
@@ -63,7 +64,7 @@ void CoreRegistry::start(HttpServer *svr)
                     InputPluginPtr mod = _input_registry.instantiate(alias);
                     _logger->info("Load input stream plugin: {} version {} interface {}", alias, version, mod->pluginInterface());
                     mod->init_plugin(this, svr, &geo::GeoIP(), &geo::GeoASN());
-                    auto result = _input_plugins.insert({std::make_pair(corrade_to_std_string(alias), version), std::move(mod)});
+                    auto result = _input_plugins.try_emplace(std::make_pair(corrade_to_std_string(alias), version), std::move(mod));
                     if (!result.second) {
                         throw std::runtime_error(fmt::format("Input alias '{}' with version '{}' was already loaded.", alias, version));
                     }
@@ -93,7 +94,7 @@ void CoreRegistry::start(HttpServer *svr)
                     HandlerPluginPtr mod = _handler_registry.instantiate(s);
                     _logger->info("Load stream handler plugin: {} version {} interface {}", alias, version, mod->pluginInterface());
                     mod->init_plugin(this, svr, &geo::GeoIP(), &geo::GeoASN());
-                    auto result = _handler_plugins.insert({std::make_pair(corrade_to_std_string(alias), version), std::move(mod)});
+                    auto result = _handler_plugins.try_emplace(std::make_pair(corrade_to_std_string(alias), version), std::move(mod));
                     if (!result.second) {
                         throw std::runtime_error(fmt::format("Handler alias '{}' with version '{}' was already loaded.", alias, version));
                     }

src/HandlerModulePlugin.h

@@ -29,7 +29,7 @@ class HandlerModulePlugin : public AbstractPlugin
 
     static Corrade::Containers::Array<Corrade::Containers::String> pluginSearchPaths()
     {
-        return {};
+        return Corrade::Containers::Array<Corrade::Containers::String>{1};
     }
 
     explicit HandlerModulePlugin(Corrade::PluginManager::AbstractManager &manager, const std::string &plugin)

src/InputModulePlugin.h

@@ -26,7 +26,7 @@ class InputModulePlugin : public AbstractPlugin
 
     static Corrade::Containers::Array<Corrade::Containers::String> pluginSearchPaths()
     {
-        return {};
+        return Corrade::Containers::Array<Corrade::Containers::String>{1};
     }
 
     explicit InputModulePlugin(Corrade::PluginManager::AbstractManager &manager, const std::string &plugin)

src/handlers/static_plugins.h

@@ -1,5 +1,8 @@
 #pragma once
 
+#include <Corrade/PluginManager/AbstractManager.h>
+#include <Corrade/Utility/Macros.h>
+
 static int import_handler_plugins()
 {
     CORRADE_PLUGIN_IMPORT(VisorHandlerNet);

src/inputs/static_plugins.h

@@ -1,5 +1,8 @@
 #pragma once
 
+#include <Corrade/PluginManager/AbstractManager.h>
+#include <Corrade/Utility/Macros.h>
+
 static int import_input_plugins()
 {
     CORRADE_PLUGIN_IMPORT(VisorInputMock);