vcpkg/ports/mathgl/linkage.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a316984..920a099 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -71,6 +71,14 @@ macro(mgl_po_src)
 	set(po_files ${po_files} ${l_files} PARENT_SCOPE)
 endmacro(mgl_po_src)
 
+if(BUILD_SHARED_LIBS)
+	set(link_type "")
+	set(excluded_type "-static")
+else()
+	set(link_type "-static")
+	set(excluded_type "")
+endif()
+
 function(mgl_add_lib mgl_tmp_lib)
 	if(${mgl_tmp_lib} MATCHES mgl)
 		set(mgllib mgl)
@@ -113,8 +121,10 @@ function(mgl_add_lib mgl_tmp_lib)
 			set_target_properties(${mgllib}-static PROPERTIES OUTPUT_NAME "${mgllib}${mgl_lib_static}${mgl_lib_end}")
 	endif(enable-mgl2)
 
+	target_compile_definitions(${mgllib} PRIVATE BUILDING_${mgllib}_LIB)
+	set_target_properties(${mgllib}${excluded_type} PROPERTIES EXCLUDE_FROM_ALL 1)
 	install(
-			TARGETS ${mgllib} ${mgllib}-static
+			TARGETS ${mgllib}${link_type}
 			EXPORT MathGLTargets
 			RUNTIME DESTINATION ${MathGL_INSTALL_BIN_DIR}
 			ARCHIVE DESTINATION ${MathGL_INSTALL_LIB_DIR}
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 0263910..186d95b 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -4,7 +4,7 @@ file(COPY ${CMAKE_SOURCE_DIR}/examples/Equirectangular-projection.jpg DESTINATIO
 file(COPY ${CMAKE_SOURCE_DIR}/examples/samples.cpp DESTINATION ${CMAKE_BINARY_DIR}/examples)
 file(COPY ${CMAKE_SOURCE_DIR}/examples/wnd_samples.cpp DESTINATION ${CMAKE_BINARY_DIR}/examples)
 add_executable(mgl_example wnd_samples.cpp full_test.cpp samples.cpp)
-target_link_libraries(mgl_example mgl-static ${getopt_lib-static})
+target_link_libraries(mgl_example mgl${link_type} ${getopt_lib-static})
 if(CMAKE_BUILD_TYPE STREQUAL "Debug" AND CMAKE_COMPILER_IS_GNUCXX AND enable-lcov)
 	setup_target_for_coverage(
 	    NAME mgl_coverage
@@ -16,25 +16,25 @@ endif(CMAKE_BUILD_TYPE STREQUAL "Debug" AND CMAKE_COMPILER_IS_GNUCXX AND enable-
 if(MGL_HAVE_FLTK)
 	include_directories(${FLTK_INCLUDE_DIR})
 	add_executable(mgl_fltk_example wnd_samples.cpp fltk_example.cpp)
-	target_link_libraries(mgl_fltk_example mgl-fltk)
+	target_link_libraries(mgl_fltk_example mgl-fltk${link_type})
 endif(MGL_HAVE_FLTK)
 
 if(MGL_HAVE_GLUT)
 	add_executable(mgl_glut_example wnd_samples.cpp glut_example.cpp)
-	target_link_libraries(mgl_glut_example mgl-glut)
+	target_link_libraries(mgl_glut_example mgl-glut${link_type})
 endif(MGL_HAVE_GLUT)
 
 if(MGL_HAVE_WX)
 	include(${wxWidgets_USE_FILE})
 	add_executable(mgl_wx_example wnd_samples.cpp wx_example.cpp)
-	target_link_libraries(mgl_wx_example mgl-wx)
+	target_link_libraries(mgl_wx_example mgl-wx${link_type})
 endif(MGL_HAVE_WX)
 
 if(QT_ENABLED)
 	add_executable(mgl_qt_example wnd_samples.cpp qt_example.cpp)
 	if(enable-qt5)
 		include(../scripts/qt5.cmake)
-		target_link_libraries(mgl_qt_example mgl-qt5)
+		target_link_libraries(mgl_qt_example mgl-qt5${link_type})
 	else(enable-qt5)
 		include(../scripts/qt4.cmake)
 		target_link_libraries(mgl_qt_example mgl-qt4)
@@ -43,7 +43,7 @@ if(QT_ENABLED)
 	if(MGL_HAVE_OPENGL)
 		add_executable(mgl_qgl_example wnd_samples.cpp qgl_example.cpp)
 		if(enable-qt5)
-			target_link_libraries(mgl_qgl_example mgl ${MGL_QT5_LIBS})
+			target_link_libraries(mgl_qgl_example mgl${link_type} ${MGL_QT5_LIBS})
 		else(enable-qt5)
 			target_link_libraries(mgl_qgl_example mgl ${MGL_QT4_LIBS})
 		endif(enable-qt5)
@@ -52,11 +52,11 @@ endif(QT_ENABLED)
 
 if(MGL_HAVE_LTDL)
 	add_library(mgl_module MODULE mgl_module.cpp)
-	target_link_libraries(mgl_module mgl)	# for compatibility with win32
+	target_link_libraries(mgl_module mgl${link_type})	# for compatibility with win32
 endif(MGL_HAVE_LTDL)
 
 if(MGL_HAVE_MPI)
 	add_executable(mgl_mpi_example mpi_test.cpp)
-	target_link_libraries(mgl_mpi_example mgl-mpi mgl ${MPI_LIBRARIES})
+	target_link_libraries(mgl_mpi_example mgl-mpi${link_type} mgl${link_type} ${MPI_LIBRARIES})
 	target_include_directories(mgl_mpi_example SYSTEM PUBLIC ${MPI_CXX_INCLUDE_PATH})
 endif(MGL_HAVE_MPI)
diff --git a/include/mgl2/abstract.h b/include/mgl2/abstract.h
index da27869..b1e6761 100644
--- a/include/mgl2/abstract.h
+++ b/include/mgl2/abstract.h
@@ -20,6 +20,15 @@
 #ifndef _MGL_ABSTRACT_H_
 #define _MGL_ABSTRACT_H_
 
+#include "mgl2/dllexport.h"
+#if defined(BUILDING_mgl_LIB) || !defined mgl_EXPORTS
+#define MGL_CORE_EXPORT MGL_EXPORT
+#elif defined(_WIN32) && !defined(MGL_STATIC_DEFINE)
+#define MGL_CORE_EXPORT __declspec(dllimport)
+#else
+#define MGL_CORE_EXPORT 
+#endif
+
 #include "mgl2/define.h"
 //-----------------------------------------------------------------------------
 #ifdef __cplusplus
@@ -209,11 +218,11 @@ cmdual MGL_EXPORT mgl_cexpr_eval_v(HAEX ex, mdual *vars);
 
 //-----------------------------------------------------------------------------
 /// Callback function for asking user a question. Result shouldn't exceed 1024.
-extern MGL_EXPORT void (*mgl_ask_func)(const wchar_t *quest, wchar_t *res);
+extern MGL_CORE_EXPORT void (*mgl_ask_func)(const wchar_t *quest, wchar_t *res);
 /// Console function for asking user a question. Result shouldn't exceed 1024.
 void MGL_EXPORT mgl_ask_gets(const wchar_t *quest, wchar_t *res);
 /// Callback function for displaying progress of something.
-extern MGL_EXPORT void (*mgl_progress_func)(int value, int maximal, HMGL gr);
+extern MGL_CORE_EXPORT void (*mgl_progress_func)(int value, int maximal, HMGL gr);
 /// Console function for displaying progress of something.
 void MGL_EXPORT mgl_progress_txt(int value, int maximal, HMGL gr);
 /// Display progress of something.
@@ -404,7 +413,7 @@ struct MGL_EXPORT mglColorID
 	char id;
 	mglColor col;
 };
-MGL_EXPORT extern mglColorID mglColorIds[31];
+MGL_CORE_EXPORT extern mglColorID mglColorIds[31];
 // MGL_EXPORT extern std::string mglGlobalMess;	///< Buffer for receiving global messages
 //-----------------------------------------------------------------------------
 #endif
diff --git a/mgllab/CMakeLists.txt b/mgllab/CMakeLists.txt
index 1649104..41c2e6a 100644
--- a/mgllab/CMakeLists.txt
+++ b/mgllab/CMakeLists.txt
@@ -38,7 +38,7 @@ if(MGL_HAVE_FLTK)
 		set(mgllab_src ${mgllab_src} mgllab.rc)
 	endif(WIN32)
 	add_executable(mgllab ${mgllab_src} ${mgllab_hdr})
-	target_link_libraries(mgllab mgl mgl-fltk ${FLTK_LIBRARIES})
+	target_link_libraries(mgllab mgl${link_type} mgl-fltk${link_type} ${getopt_lib-static} ${FLTK_LIBRARIES})
 	install(
 		TARGETS mgllab
 		RUNTIME DESTINATION bin	)
diff --git a/utils/CMakeLists.txt b/utils/CMakeLists.txt
index 3e10fa7..0281859 100644
--- a/utils/CMakeLists.txt
+++ b/utils/CMakeLists.txt
@@ -1,11 +1,5 @@
 add_executable(make_pas make_pas.cpp)
 
-if(MSVC)
-set(link_type -static)
-else(MSVC)
-set(link_type)
-endif(MSVC)
-
 add_executable(mgltask mgltask.cpp)
 target_link_libraries(mgltask mgl${link_type} ${getopt_lib-static})
 install(
@@ -23,7 +17,7 @@ install(
 )
 
 add_executable(mgl.cgi mglcgi.cpp)
-target_link_libraries(mgl.cgi mgl-static)
+target_link_libraries(mgl.cgi mgl${link_type})
 install(
 	TARGETS mgl.cgi
 	EXPORT MathGLTargets
@@ -36,7 +30,7 @@ mgl_po_src(mglconv.cpp mglview.cpp mglcgi.cpp mgltask.cpp)
 if(MGL_HAVE_FLTK)
 	add_definitions(-DUSE_FLTK)
 	add_executable(mglview mglview.cpp)
-	target_link_libraries(mglview mgl-fltk ${getopt_lib-static} ${FLTK_LIBRARIES})
+	target_link_libraries(mglview mgl-fltk${link_type} ${getopt_lib-static} ${FLTK_LIBRARIES})
 	install(
 		TARGETS mglview
 		EXPORT MathGLTargets