Only use date library on macOS.

CMakeLists.txt

@@ -67,7 +67,6 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 find_package(Boost 1.84.0 CONFIG)
 find_package(cryptopp 8.9.0 MODULE)
-find_package(date 3.0.1 CONFIG)
 find_package(fmt 10.2.1 CONFIG)
 find_package(glslang 14.2.0 CONFIG)
 find_package(magic_enum 0.9.6 CONFIG)
@@ -81,6 +80,10 @@ find_package(xxHash 0.8.2 MODULE)
 find_package(zlib-ng 2.2.0 MODULE)
 find_package(Zydis 4.1.0 CONFIG)
 
+if (APPLE)
+    find_package(date 3.0.1 CONFIG)
+endif()
+
 include(CheckSymbolExists)
 check_symbol_exists(pthread_mutex_timedlock "pthread.h" HAVE_PTHREAD_MUTEX_TIMEDLOCK)
 # Windows always has the function through winpthreads
@@ -554,7 +557,7 @@ endif()
 
 create_target_directory_groups(shadps4)
 
-target_link_libraries(shadps4 PRIVATE magic_enum::magic_enum fmt::fmt toml11::toml11 tsl::robin_map xbyak::xbyak Tracy::TracyClient date::date-tz)
+target_link_libraries(shadps4 PRIVATE magic_enum::magic_enum fmt::fmt toml11::toml11 tsl::robin_map xbyak::xbyak Tracy::TracyClient)
 target_link_libraries(shadps4 PRIVATE Boost::headers GPUOpen::VulkanMemoryAllocator sirit Vulkan::Headers xxHash::xxhash Zydis::Zydis glslang::SPIRV glslang::glslang SDL3::SDL3)
 
 if (APPLE)
@@ -564,6 +567,9 @@ if (APPLE)
   # Link MoltenVK for Vulkan support
   find_library(MOLTENVK MoltenVK REQUIRED)
   target_link_libraries(shadps4 PRIVATE ${MOLTENVK})
+
+  # Replacement for std::chrono::time_zone
+  target_link_libraries(shadps4 PRIVATE date::date-tz)
 endif()
 
 if (NOT ENABLE_QT_GUI)

externals/CMakeLists.txt

@@ -135,7 +135,7 @@ if (WIN32)
 endif()
 
 # date
-if (NOT TARGET date::date-tz)
+if (APPLE AND NOT TARGET date::date-tz)
     option(BUILD_TZ_LIB "" ON)
     option(USE_SYSTEM_TZ_DB "" ON)
     add_subdirectory(date)

src/core/libraries/kernel/libkernel.cpp

@@ -3,7 +3,6 @@
 
 #include <chrono>
 #include <thread>
-#include <date/tz.h>
 
 #include <boost/asio/io_context.hpp>
 
@@ -33,6 +32,9 @@
 #include <windows.h>
 #else
 #include <sys/mman.h>
+#ifdef __APPLE__
+#include <date/tz.h>
+#endif
 #endif
 
 namespace Libraries::Kernel {
@@ -182,7 +184,12 @@ s64 PS4_SYSV_ABI ps4__write(int d, const void* buf, std::size_t nbytes) {
 int PS4_SYSV_ABI sceKernelConvertUtcToLocaltime(time_t time, time_t* local_time,
                                                 struct OrbisTimesec* st, unsigned long* dst_sec) {
     LOG_TRACE(Kernel, "Called");
+#ifdef __APPLE__
+    // std::chrono::current_zone() not available yet.
     const auto* time_zone = date::current_zone();
+#else
+    const auto* time_zone = std::chrono::current_zone();
+#endif
     auto info = time_zone->get_info(std::chrono::system_clock::now());
 
     *local_time = info.offset.count() + info.save.count() * 60 + time;