Set CMAKE_CXX_VISIBILITY_PRESET and 3. VISIBILITY_INLINES_HIDDEN when build shared lib

CMakeLists.txt

@@ -242,6 +242,10 @@ if (BUILD_SHARED_LIBS)
     endif ()
     add_library(spdlog SHARED ${VERSION_RC})
     target_compile_definitions(spdlog PUBLIC SPDLOG_SHARED_LIB)
+    set_target_properties(spdlog PROPERTIES
+            CXX_VISIBILITY_PRESET hidden
+            VISIBILITY_INLINES_HIDDEN ON)
+
     if (MSVC)
         # disable dlls related warnings on msvc
         target_compile_options(spdlog PUBLIC $<$<AND:$<CXX_COMPILER_ID:MSVC>,$<NOT:$<COMPILE_LANGUAGE:CUDA>>>:/wd4251

include/spdlog/details/null_mutex.h

@@ -5,18 +5,18 @@
 
 #include <atomic>
 #include <utility>
-
+#include "../common.h"
 // null, no cost dummy "mutex" and dummy "atomic" log level
 
 namespace spdlog {
 namespace details {
-struct null_mutex {
+struct SPDLOG_API null_mutex {
     void lock() const {}
     void unlock() const {}
 };
 
 template <typename T>
-struct null_atomic {
+struct SPDLOG_API null_atomic {
     T value;
 
     null_atomic() = default;

src/sinks/ansicolor_sink.cpp

@@ -117,6 +117,8 @@ ansicolor_stderr_sink<Mutex>::ansicolor_stderr_sink(color_mode mode)
 
 // template instantiations
 #include "spdlog/details/null_mutex.h"
+template class SPDLOG_API spdlog::sinks::ansicolor_sink<std::mutex>;
+template class SPDLOG_API spdlog::sinks::ansicolor_sink<spdlog::details::null_mutex>;
 template class SPDLOG_API spdlog::sinks::ansicolor_stdout_sink<std::mutex>;
 template class SPDLOG_API spdlog::sinks::ansicolor_stdout_sink<spdlog::details::null_mutex>;
 template class SPDLOG_API spdlog::sinks::ansicolor_stderr_sink<std::mutex>;