Fix link type mismatch on Windows and build a shared library by default.

CMakeLists.txt

@@ -11,6 +11,9 @@ set(PROJECT_VERSION_MINOR 0)
 set(PROJECT_VERSION_PATCH 1)
 set(PROJECT_VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH})
 
+# Build a shared library by default
+option(BUILD_SHARED_LIBS "Build QHttpEngine as a shared library" ON)
+
 set(BIN_INSTALL_DIR bin CACHE STRING "Binary runtime installation directory relative to the install prefix")
 set(LIB_INSTALL_DIR lib CACHE STRING "Library installation directory relative to the install prefix")
 set(INCLUDE_INSTALL_DIR include CACHE STRING "Header installation directory relative to the install prefix")

src/qhttpengine_export.h.in

@@ -30,14 +30,16 @@
 #define QHTTPENGINE_VERSION_PATCH @PROJECT_VERSION_PATCH@
 #define QHTTPENGINE_VERSION       "@PROJECT_VERSION@"
 
-#if defined(QT_STATIC)
-# define QHTTPENGINE_EXPORT
-#else
+#cmakedefine BUILD_SHARED_LIBS
+
+#if defined(BUILD_SHARED_LIBS)
 #  if defined(QHTTPENGINE_LIBRARY)
 #    define QHTTPENGINE_EXPORT Q_DECL_EXPORT
 #  else
 #    define QHTTPENGINE_EXPORT Q_DECL_IMPORT
 #  endif
+#else
+#  define QHTTPENGINE_EXPORT
 #endif
 
 #endif // QHTTPENGINE_QHTTPENGINE_H