[CMake] Remove redundant linking in CMake build process (STR #3298).

[CMake] Simplify CMake build files, remove redundancies.

Ports of branch-1.3, svn r 11442 and 11444:

Remove src/fl_call_main.c from non-Windows (static) libraries. It would
be an empty object file anyway.
 
Use CMake variables to set up used files and linked libraries to remove
redundancies. All files and libs are used only in the definition of
CMake variables and used later in static and shared builds, resp.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11447 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

fluid/CMakeLists.txt

@@ -48,22 +48,13 @@ endif(APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
 
 target_link_libraries(fluid fltk fltk_images fltk_forms)
 
-# link in optional libraries
-if(USE_XFT)
-   target_link_libraries(fluid ${X11_Xft_LIB})
-endif(USE_XFT)
-
-if(HAVE_XINERAMA)
-   target_link_libraries(fluid ${X11_Xinerama_LIB})
-endif(HAVE_XINERAMA)
-
-if(HAVE_XRENDER)
-   target_link_libraries(fluid ${X11_Xrender_LIB})
-endif(HAVE_XRENDER)
+# install fluid
 
 if(APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
+  # create bundle
   set_target_properties(fluid PROPERTIES MACOSX_BUNDLE_ICON_FILE ${ICON_NAME})
   set_target_properties(fluid PROPERTIES RESOURCE ${ICON_PATH})
+  # install
   install(TARGETS fluid DESTINATION ${FLTK_BINDIR})
 else()
   install(TARGETS fluid
@@ -74,6 +65,8 @@ else()
     )
 endif(APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
 
+# install desktop files
+
 if(UNIX)
     install(FILES fluid.desktop
         DESTINATION ${FLTK_DATADIR}/applications