support building shared library (for vcpkg)

Author: alex85k

CMakeLists.txt

@@ -1,9 +1,20 @@
 PROJECT(wingetopt)
 cmake_minimum_required(VERSION 2.8)
 
+option(BUILD_SHARED_LIBS "Build the shared library" OFF)
+
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src)
-add_library(wingetopt STATIC src/getopt.c src/getopt.h)
+
+if(BUILD_SHARED_LIBS)
+  set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
+endif()
+
+add_library(wingetopt src/getopt.c src/getopt.h)
 
 install(FILES src/getopt.h DESTINATION include)
-install(TARGETS wingetopt LIBRARY DESTINATION lib ARCHIVE DESTINATION lib)
+
+install(TARGETS wingetopt
+    RUNTIME DESTINATION bin
+	LIBRARY DESTINATION lib
+	ARCHIVE DESTINATION lib)