[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

1 files changed, 132 insertions, 147 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d59f848f0..c53ce2537 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-set(CPPFILES
+set (CPPFILES
   Fl.cxx
   Fl_Adjuster.cxx
   Fl_Bitmap.cxx
@@ -144,29 +144,31 @@ set(CPPFILES
   fl_encoding_mac_roman.cxx
 )
 
-file(GLOB
+file (GLOB
   HEADER_FILES
   "../FL/*.H"
   "../FL/*.h"
 )
 
+set (GL_HEADER_FILES)		# FIXME: not (yet?) defined
+
 if ((USE_X11 OR USE_SDL) AND NOT OPTION_PRINT_SUPPORT)
-  set(PSFILES
+  set (PSFILES
   )
-else()
-  set(PSFILES
+else ()
+  set (PSFILES
     drivers/PostScript/Fl_PostScript.cxx
     drivers/PostScript/Fl_PostScript_image.cxx
   )
-endif((USE_X11 OR USE_SDL) AND NOT OPTION_PRINT_SUPPORT)
+endif ((USE_X11 OR USE_SDL) AND NOT OPTION_PRINT_SUPPORT)
 
-set(DRIVER_FILES)
+set (DRIVER_FILES)
 
 if (USE_X11)
 
   # X11 (including APPLE with X11)
 
-  set(DRIVER_FILES
+  set (DRIVER_FILES
     drivers/Posix/Fl_Posix_System_Driver.cxx
     drivers/Posix/Fl_Posix_Printer_Driver.cxx
     drivers/X11/Fl_X11_Screen_Driver.cxx
@@ -184,15 +186,15 @@ if (USE_X11)
     Fl_x.cxx
   )
   if (USE_XFT)
-    set(DRIVER_FILES ${DRIVER_FILES}
+    set (DRIVER_FILES ${DRIVER_FILES}
       drivers/Xlib/Fl_Xlib_Graphics_Driver_font_xft.cxx
     )
   else ()
-    set(DRIVER_FILES ${DRIVER_FILES}
+    set (DRIVER_FILES ${DRIVER_FILES}
       drivers/Xlib/Fl_Xlib_Graphics_Driver_font_x.cxx
     )  
   endif (USE_XFT)
-  set(DRIVER_HEADER_FILES
+  set (DRIVER_HEADER_FILES
     drivers/Posix/Fl_Posix_System_Driver.H
     drivers/X11/Fl_X11_Screen_Driver.H
     drivers/X11/Fl_X11_Window_Driver.H
@@ -203,7 +205,7 @@ elseif (USE_SDL)
 
   # SDL2 
 
-  set(DRIVER_FILES
+  set (DRIVER_FILES
     drivers/Pico/Fl_Pico_System_Driver.cxx
     drivers/Pico/Fl_Pico_Screen_Driver.cxx
     drivers/Pico/Fl_Pico_Window_Driver.cxx
@@ -217,7 +219,7 @@ elseif (USE_SDL)
     drivers/PicoSDL/Fl_PicoSDL_Copy_Surface.cxx
     drivers/PicoSDL/Fl_PicoSDL_Image_Surface.cxx
   )
-  set(DRIVER_HEADER_FILES
+  set (DRIVER_HEADER_FILES
     drivers/Pico/Fl_Pico_System_Driver.H
     drivers/Pico/Fl_Pico_Screen_Driver.H
     drivers/Pico/Fl_Pico_Window_Driver.H
@@ -232,7 +234,7 @@ elseif (APPLE)
 
   # Apple Quartz
 
-  set(DRIVER_FILES
+  set (DRIVER_FILES
     drivers/Quartz/Fl_Quartz_Display_Device.cxx
     drivers/Quartz/Fl_Quartz_Graphics_Driver.cxx
     drivers/Quartz/Fl_Quartz_Graphics_Driver_color.cxx
@@ -249,7 +251,7 @@ elseif (APPLE)
     drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx
     drivers/Darwin/Fl_Darwin_System_Driver.cxx
   )
-  set(DRIVER_HEADER_FILES
+  set (DRIVER_HEADER_FILES
     drivers/Darwin/Fl_Darwin_System_Driver.H
     drivers/Cocoa/Fl_Cocoa_Screen_Driver.H
     drivers/Cocoa/Fl_Cocoa_Window_Driver.H
@@ -260,7 +262,7 @@ else ()
 
   # Windows (GDI)
 
-  set(DRIVER_FILES
+  set (DRIVER_FILES
     drivers/WinAPI/Fl_WinAPI_System_Driver.cxx
     drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
     drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
@@ -277,7 +279,7 @@ else ()
     drivers/GDI/Fl_GDI_Image_Surface_Driver.cxx
     Fl_win32.cxx
   )
-  set(DRIVER_HEADER_FILES
+  set (DRIVER_HEADER_FILES
     drivers/WinAPI/Fl_WinAPI_System_Driver.H
     drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
     drivers/WinAPI/Fl_WinAPI_Window_Driver.H
@@ -290,12 +292,12 @@ source_group("Source Files\\Headers" FILES ${HEADER_FILES})
 source_group("Driver Source Files" FILES ${DRIVER_FILES})
 source_group("Driver Source Files\\Headers" FILES ${DRIVER_HEADER_FILES})
 
-set(CPPFILES
+set (CPPFILES
   ${CPPFILES}
   ${DRIVER_FILES}
 )
 
-set(FLCPPFILES
+set (FLCPPFILES
   forms_compatability.cxx
   forms_bitmap.cxx
   forms_free.cxx
@@ -304,7 +306,7 @@ set(FLCPPFILES
   forms_timer.cxx
 )
 
-set(GLCPPFILES
+set (GLCPPFILES
   Fl_Gl_Choice.cxx
   Fl_Gl_Device_Plugin.cxx
   Fl_Gl_Overlay.cxx
@@ -338,12 +340,12 @@ set (GL_DRIVER_HEADER_FILES
 source_group("Driver Header Files" FILES ${GL_DRIVER_HEADER_FILES})
 source_group("Driver Source Files" FILES ${GL_DRIVER_FILES})
 
-set(GLCPPFILES
+set (GLCPPFILES
   ${GLCPPFILES}
   ${GL_DRIVER_FILES}
 )
 
-set(IMGCPPFILES
+set (IMGCPPFILES
   fl_images_core.cxx
   Fl_BMP_Image.cxx
   Fl_File_Icon2.cxx
@@ -354,7 +356,7 @@ set(IMGCPPFILES
   Fl_PNM_Image.cxx
 )
 
-set(CFILES
+set (CFILES
   flstring.c
   scandir.c
   numericsort.c
@@ -369,189 +371,172 @@ set(CFILES
   fl_utf.c
 )
 
-add_definitions(-DFL_LIBRARY)
-
-if(APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
-    set(MMFILES
+if (APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
+    set (MMFILES
         Fl_cocoa.mm
         drivers/Cocoa/Fl_Cocoa_Printer_Driver.mm
         Fl_Native_File_Chooser_MAC.mm
         Fl_Sys_Menu_Bar.mm
         )
 else()
-   set(MMFILES
+   set (MMFILES
       )
-endif(APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
+endif (APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
+
 
 #######################################################################
-FL_ADD_LIBRARY(fltk STATIC "${CPPFILES};${PSFILES};${MMFILES};${CFILES};fl_call_main.c;${HEADER_FILES};${DRIVER_HEADER_FILES}")
 
-if(LIB_dl)
-   target_link_libraries(fltk ${LIB_dl})
-endif(LIB_dl)
+# prepare source files for shared and static FLTK libraries
 
-if(USE_THREADS)
-   target_link_libraries(fltk ${CMAKE_THREAD_LIBS_INIT})
-endif(USE_THREADS)
+set (SHARED_FILES ${CPPFILES} ${MMFILES} ${CFILES} ${PSFILES})
+list (APPEND SHARED_FILES ${HEADER_FILES} ${DRIVER_HEADER_FILES})
 
-if(USE_X11)
-   target_link_libraries(fltk ${X11_LIBRARIES})
-endif(USE_X11)
+set (STATIC_FILES ${SHARED_FILES})
+
+if (WIN32)
+    list (APPEND STATIC_FILES fl_call_main.c)
+endif (WIN32)
+
+add_definitions(-DFL_LIBRARY)
+
+#######################################################################
+
+# prepare optional libs for shared and static FLTK libraries
+
+set (OPTIONAL_LIBS)
+
+if (LIB_dl)
+    list (APPEND OPTIONAL_LIBS ${LIB_dl})
+endif (LIB_dl)
+
+if (USE_THREADS)
+    list (APPEND OPTIONAL_LIBS ${CMAKE_THREAD_LIBS_INIT})
+endif (USE_THREADS)
+
+if (USE_X11)
+    list (APPEND OPTIONAL_LIBS ${X11_LIBRARIES})
+endif (USE_X11)
 
 if (USE_SDL)
-   target_link_libraries(fltk ${SDL2_LIBRARY})
+    list (APPEND OPTIONAL_LIBS ${SDL2_LIBRARY})
 endif(USE_SDL)
 
-if(WIN32)
-   target_link_libraries(fltk comctl32)
-endif(WIN32)
+if (WIN32)
+    list (APPEND OPTIONAL_LIBS comctl32)
+endif (WIN32)
+
+if (FLTK_HAVE_CAIRO)
+    list (APPEND OPTIONAL_LIBS fltk_cairo ${PKG_CAIRO_LIBRARIES})
+ENDif (FLTK_HAVE_CAIRO)
+
+if (HAVE_XINERAMA)
+    list (APPEND OPTIONAL_LIBS ${X11_Xinerama_LIB})
+endif (HAVE_XINERAMA)
+
+if (HAVE_XFIXES)
+    list (APPEND OPTIONAL_LIBS ${X11_Xfixes_LIB})
+endif (HAVE_XFIXES)
 
-if(FLTK_HAVE_CAIRO)
-   target_link_libraries(fltk fltk_cairo ${PKG_CAIRO_LIBRARIES})
-ENDif(FLTK_HAVE_CAIRO)
+if (HAVE_XCURSOR)
+    list (APPEND OPTIONAL_LIBS ${X11_Xcursor_LIB})
+endif (HAVE_XCURSOR)
 
-if(HAVE_XINERAMA)
-   target_link_libraries(fltk ${X11_Xinerama_LIB})
-endif(HAVE_XINERAMA)
+if (HAVE_XRENDER)
+    list (APPEND OPTIONAL_LIBS ${X11_Xrender_LIB})
+endif (HAVE_XRENDER)
 
-if(HAVE_XFIXES)
-   target_link_libraries(fltk ${X11_Xfixes_LIB})
-endif(HAVE_XFIXES)
+if (USE_XFT)
+    list (APPEND OPTIONAL_LIBS ${X11_Xft_LIB})
+    if (LIB_fontconfig)
+	list (APPEND OPTIONAL_LIBS ${LIB_fontconfig})
+    endif (LIB_fontconfig)
+endif (USE_XFT)
 
-if(HAVE_XCURSOR)
-   target_link_libraries(fltk ${X11_Xcursor_LIB})
-endif(HAVE_XCURSOR)
+#######################################################################
 
-if(USE_XFT)
-   target_link_libraries(fltk ${X11_Xft_LIB})
-   if(LIB_fontconfig)
-      target_link_libraries(fltk ${LIB_fontconfig})
-   endif(LIB_fontconfig)
-endif(USE_XFT)
+FL_ADD_LIBRARY(fltk STATIC "${STATIC_FILES}")
+target_link_libraries(fltk ${OPTIONAL_LIBS})
 
 #######################################################################
+
 FL_ADD_LIBRARY(fltk_forms STATIC "${FLCPPFILES}")
 target_link_libraries(fltk_forms fltk)
 
 #######################################################################
+
 FL_ADD_LIBRARY(fltk_images STATIC "${IMGCPPFILES}")
 target_link_libraries(fltk_images fltk ${FLTK_PNG_LIBRARIES}
      ${FLTK_JPEG_LIBRARIES} ${FLTK_ZLIB_LIBRARIES})
 
-if(OPTION_USE_SYSTEM_LIBJPEG)
+if (OPTION_USE_SYSTEM_LIBJPEG)
     target_link_libraries(fltk_images ${FLTK_JPEG_LIBRARIES})
 else()
     target_link_libraries(fltk_images fltk_jpeg)
-endif(OPTION_USE_SYSTEM_LIBJPEG)
+endif (OPTION_USE_SYSTEM_LIBJPEG)
 
-if(OPTION_USE_SYSTEM_ZLIB)
+if (OPTION_USE_SYSTEM_ZLIB)
     target_link_libraries(fltk_images ${FLTK_ZLIB_LIBRARIES})
 else()
     target_link_libraries(fltk_images fltk_z)
-endif(OPTION_USE_SYSTEM_ZLIB)
+endif (OPTION_USE_SYSTEM_ZLIB)
 
-if(OPTION_USE_SYSTEM_LIBPNG)
+if (OPTION_USE_SYSTEM_LIBPNG)
     target_link_libraries(fltk_images ${FLTK_PNG_LIBRARIES})
 else()
     target_link_libraries(fltk_images fltk_png)
-endif(OPTION_USE_SYSTEM_LIBPNG)
+endif (OPTION_USE_SYSTEM_LIBPNG)
 
 #######################################################################
-if(OPENGL_FOUND)
-FL_ADD_LIBRARY(fltk_gl STATIC "${GLCPPFILES};${GL_HEADER_FILE};${GL_DRIVER_HEADER_FILES}")
+
+if (OPENGL_FOUND)
+    FL_ADD_LIBRARY(fltk_gl STATIC "${GLCPPFILES};${GL_HEADER_FILES};${GL_DRIVER_HEADER_FILES}")
    target_link_libraries(fltk_gl fltk ${OPENGL_LIBRARIES})
-endif(OPENGL_FOUND)
+endif (OPENGL_FOUND)
 
 #######################################################################
+# Build shared libraries (optional)
 #######################################################################
-if(OPTION_BUILD_SHARED_LIBS)
 
-#######################################################################
-FL_ADD_LIBRARY(fltk SHARED "${CPPFILES};${MMFILES};${CFILES};${HEADER_FILES};${DRIVER_HEADER_FILES}")
+if (OPTION_BUILD_SHARED_LIBS)
 
-if(LIB_dl)
-   target_link_libraries(fltk_SHARED ${LIB_dl})
-endif(LIB_dl)
+    FL_ADD_LIBRARY(fltk SHARED "${SHARED_FILES}")
+    target_link_libraries(fltk_SHARED ${OPTIONAL_LIBS})
 
-if(USE_THREADS)
-   target_link_libraries(fltk_SHARED ${CMAKE_THREAD_LIBS_INIT})
-endif(USE_THREADS)
+    ###################################################################
 
-if(USE_X11)
-   target_link_libraries(fltk_SHARED ${X11_LIBRARIES})
-endif(USE_X11)
+    FL_ADD_LIBRARY(fltk_forms SHARED "${FLCPPFILES}")
+    target_link_libraries(fltk_forms_SHARED fltk_SHARED)
 
-if (USE_SDL)
-   target_link_libraries(fltk ${SDL2_LIBRARY})
-endif(USE_SDL)
-
-if(WIN32)
-   target_link_libraries(fltk_SHARED comctl32)
-endif(WIN32)
+    ###################################################################
 
-if(FLTK_HAVE_CAIRO)
-   target_link_libraries(fltk_SHARED fltk_cairo_SHARED ${PKG_CAIRO_LIBRARIES})
-ENDif(FLTK_HAVE_CAIRO)
+    FL_ADD_LIBRARY(fltk_images SHARED "${IMGCPPFILES}")
+    target_link_libraries(fltk_images_SHARED fltk_SHARED)
 
-if(HAVE_XINERAMA)
-   target_link_libraries(fltk_SHARED ${X11_Xinerama_LIB})
-endif(HAVE_XINERAMA)
+    if (OPTION_USE_SYSTEM_LIBJPEG)
+	target_link_libraries(fltk_images_SHARED ${FLTK_JPEG_LIBRARIES})
+    else()
+	target_link_libraries(fltk_images_SHARED fltk_jpeg_SHARED)
+    endif (OPTION_USE_SYSTEM_LIBJPEG)
 
-if(HAVE_XFIXES)
-   target_link_libraries(fltk_SHARED ${X11_Xfixes_LIB})
-endif(HAVE_XFIXES)
+    if (OPTION_USE_SYSTEM_LIBPNG)
+	target_link_libraries(fltk_images_SHARED ${FLTK_PNG_LIBRARIES})
+    else()
+	target_link_libraries(fltk_images_SHARED fltk_png_SHARED)
+    endif (OPTION_USE_SYSTEM_LIBPNG)
 
-if(HAVE_XCURSOR)
-   target_link_libraries(fltk_SHARED ${X11_Xcursor_LIB})
-endif(HAVE_XCURSOR)
+    if (OPTION_USE_SYSTEM_ZLIB)
+	target_link_libraries(fltk_images_SHARED ${FLTK_ZLIB_LIBRARIES})
+    else()
+	target_link_libraries(fltk_images_SHARED fltk_z_SHARED)
+    endif (OPTION_USE_SYSTEM_ZLIB)
 
-if(USE_XFT)
-   target_link_libraries(fltk_SHARED ${X11_Xft_LIB})
-   if(LIB_fontconfig)
-      target_link_libraries(fltk_SHARED ${LIB_fontconfig})
-   endif(LIB_fontconfig)
-endif(USE_XFT)
+    ###################################################################
 
-#######################################################################
-FL_ADD_LIBRARY(fltk_forms SHARED "${FLCPPFILES}")
-target_link_libraries(fltk_forms_SHARED fltk_SHARED)
+    if (OPENGL_FOUND)
+       FL_ADD_LIBRARY(fltk_gl SHARED "${GLCPPFILES};${GL_HEADER_FILES};${GL_DRIVER_HEADER_FILES}")
+       target_link_libraries(fltk_gl_SHARED fltk_SHARED ${OPENGL_LIBRARIES})
+    endif (OPENGL_FOUND)
 
-if(USE_THREADS)
-   target_link_libraries(fltk_forms_SHARED ${CMAKE_THREAD_LIBS_INIT} ${LIB_dl})
-endif(USE_THREADS)
+endif (OPTION_BUILD_SHARED_LIBS)
 
-if(USE_X11)
-   target_link_libraries(fltk_forms_SHARED ${X11_LIBRARIES})
-endif(USE_X11)
-
-#######################################################################
-FL_ADD_LIBRARY(fltk_images SHARED "${IMGCPPFILES}")
-target_link_libraries(fltk_images_SHARED fltk_SHARED)
-
-if(OPTION_USE_SYSTEM_LIBJPEG)
-    target_link_libraries(fltk_images_SHARED ${FLTK_JPEG_LIBRARIES})
-else()
-    target_link_libraries(fltk_images_SHARED fltk_jpeg_SHARED)
-endif(OPTION_USE_SYSTEM_LIBJPEG)
-
-if(OPTION_USE_SYSTEM_ZLIB)
-    target_link_libraries(fltk_images_SHARED ${FLTK_ZLIB_LIBRARIES})
-else()
-    target_link_libraries(fltk_images_SHARED fltk_z_SHARED)
-endif(OPTION_USE_SYSTEM_ZLIB)
-
-if(OPTION_USE_SYSTEM_LIBPNG)
-    target_link_libraries(fltk_images_SHARED ${FLTK_PNG_LIBRARIES})
-else()
-    target_link_libraries(fltk_images_SHARED fltk_png_SHARED)
-endif(OPTION_USE_SYSTEM_LIBPNG)
-
-#######################################################################
-if(OPENGL_FOUND)
-   FL_ADD_LIBRARY(fltk_gl SHARED "${GLCPPFILES};${GL_HEADER_FILE};${GL_DRIVER_HEADER_FILES}")
-   target_link_libraries(fltk_gl_SHARED fltk_SHARED ${OPENGL_LIBRARIES})
-endif(OPENGL_FOUND)
-
-#######################################################################
-endif(OPTION_BUILD_SHARED_LIBS)
 #######################################################################