Revert "Revert "Hide most of non-public symbols by default (#984)" (#1038)" (#1045)

CMakeLists.txt

@@ -14,6 +14,11 @@ include(CMakeDependentOption)
 include(CheckCXXCompilerFlag)
 include(GNUInstallDirs)
 include(CTest)
+include(GenerateExportHeader)
+
+set(CMAKE_C_VISIBILITY_PRESET hidden)
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
 
 find_program(YAML_CPP_CLANG_FORMAT_EXE NAMES clang-format)
 
@@ -81,6 +86,7 @@ set_property(TARGET yaml-cpp
 target_include_directories(yaml-cpp
   PUBLIC
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+    $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
     $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
   PRIVATE
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src>)
@@ -136,6 +142,12 @@ write_basic_package_version_file(
   "${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
   COMPATIBILITY AnyNewerVersion)
 
+generate_export_header(yaml-cpp
+  BASE_NAME YAML_CPP
+  EXPORT_FILE_NAME "${PROJECT_BINARY_DIR}/include/yaml-cpp/dll.h"
+  EXPORT_MACRO_NAME YAML_CPP_API
+)
+
 configure_file(yaml-cpp.pc.in yaml-cpp.pc @ONLY)
 
 if (YAML_CPP_INSTALL)
@@ -145,6 +157,9 @@ if (YAML_CPP_INSTALL)
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 	install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+		FILES_MATCHING PATTERN "*.h")
+	install(DIRECTORY ${PROJECT_BINARY_DIR}/include/
     DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 		FILES_MATCHING PATTERN "*.h")
   install(EXPORT yaml-cpp-targets

include/yaml-cpp/dll.h

-#ifndef DLL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-#define DLL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-
-#if defined(_MSC_VER) ||                                            \
-    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
-     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
-#pragma once
-#endif
-
-// The following ifdef block is the standard way of creating macros which make
-// exporting from a DLL simpler. All files within this DLL are compiled with the
-// yaml_cpp_EXPORTS symbol defined on the command line. This symbol should not
-// be defined on any project that uses this DLL. This way any other project
-// whose source files include this file see YAML_CPP_API functions as being
-// imported from a DLL, whereas this DLL sees symbols defined with this macro as
-// being exported.
-#undef YAML_CPP_API
-
-#ifdef YAML_CPP_DLL      // Using or Building YAML-CPP DLL (definition defined
-                         // manually)
-#ifdef yaml_cpp_EXPORTS  // Building YAML-CPP DLL (definition created by CMake
-                         // or defined manually)
-//	#pragma message( "Defining YAML_CPP_API for DLL export" )
-#define YAML_CPP_API __declspec(dllexport)
-#else  // yaml_cpp_EXPORTS
-//	#pragma message( "Defining YAML_CPP_API for DLL import" )
-#define YAML_CPP_API __declspec(dllimport)
-#endif  // yaml_cpp_EXPORTS
-#else   // YAML_CPP_DLL
-#define YAML_CPP_API
-#endif  // YAML_CPP_DLL
-
-#endif  // DLL_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/node_data.cpp

@@ -13,7 +13,7 @@
 
 namespace YAML {
 namespace detail {
-std::atomic<size_t> node::m_amount{0};
+YAML_CPP_API std::atomic<size_t> node::m_amount{0};
 
 const std::string& node_data::empty_scalar() {
   static const std::string svalue;