Partially revert commit 0733aeb4 to make dll.h a non-generated file (#1064)

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

This reverts commit 0733aeb451.

CMakeLists.txt

@@ -14,11 +14,6 @@ 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)
 
@@ -36,11 +31,13 @@ cmake_dependent_option(YAML_MSVC_SHARED_RT
   "MSVC: Build yaml-cpp with shared runtime libs (/MD)" ON
   "MSVC" OFF)
 
-set(yaml-cpp-type STATIC)
-set(yaml-cpp-label-postfix "static")
 if (YAML_BUILD_SHARED_LIBS)
   set(yaml-cpp-type SHARED)
   set(yaml-cpp-label-postfix "shared")
+else()
+  set(yaml-cpp-type STATIC)
+  set(yaml-cpp-label-postfix "static")
+  add_definitions(-DYAML_CPP_STATIC_DEFINE)
 endif()
 
 set(build-shared $<BOOL:${YAML_BUILD_SHARED_LIBS}>)
@@ -86,7 +83,6 @@ 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>)
@@ -142,12 +138,6 @@ 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)
@@ -157,9 +147,6 @@ 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

@@ -0,0 +1,61 @@
+#ifndef DLL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define DLL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+// Definition YAML_CPP_STATIC_DEFINE using to building YAML-CPP as static
+// library (definition created by CMake or defined manually)
+
+// Definition yaml_cpp_EXPORTS using to building YAML-CPP as dll/so library
+// (definition created by CMake or defined manually)
+
+#ifdef YAML_CPP_STATIC_DEFINE
+#  define YAML_CPP_API
+#  define YAML_CPP_NO_EXPORT
+#else
+#  if defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__)
+#    ifndef YAML_CPP_API
+#      ifdef yaml_cpp_EXPORTS
+         /* We are building this library */
+#        pragma message( "Defining YAML_CPP_API for DLL export" )
+#        define YAML_CPP_API __declspec(dllexport)
+#      else
+         /* We are using this library */
+#        pragma message( "Defining YAML_CPP_API for DLL import" )
+#        define YAML_CPP_API __declspec(dllimport)
+#      endif
+#    endif
+#    ifndef YAML_CPP_NO_EXPORT
+#      define YAML_CPP_NO_EXPORT
+#    endif
+#  else /* No _MSC_VER */
+#    ifndef YAML_CPP_API
+#      ifdef yaml_cpp_EXPORTS
+         /* We are building this library */
+#        define YAML_CPP_API __attribute__((visibility("default")))
+#      else
+         /* We are using this library */
+#        define YAML_CPP_API __attribute__((visibility("default")))
+#      endif
+#    endif
+#    ifndef YAML_CPP_NO_EXPORT
+#      define YAML_CPP_NO_EXPORT __attribute__((visibility("hidden")))
+#    endif
+#  endif /* _MSC_VER */
+#endif   /* YAML_CPP_STATIC_DEFINE */
+
+#ifndef YAML_CPP_DEPRECATED
+#  ifdef _MSC_VER
+#    define YAML_CPP_DEPRECATED __declspec(deprecated)
+#  else
+#    define YAML_CPP_DEPRECATED __attribute__ ((__deprecated__))
+#  endif
+#endif
+
+#ifndef YAML_CPP_DEPRECATED_EXPORT
+#  define YAML_CPP_DEPRECATED_EXPORT YAML_CPP_API YAML_CPP_DEPRECATED
+#endif
+
+#ifndef YAML_CPP_DEPRECATED_NO_EXPORT
+#  define YAML_CPP_DEPRECATED_NO_EXPORT YAML_CPP_NO_EXPORT YAML_CPP_DEPRECATED
+#endif
+
+#endif /* DLL_H_62B23520_7C8E_11DE_8A39_0800200C9A66 */