CMake: build shared libs with OPTION_CAIROEXT (issue #250)

- remove separate libfltk_cairo to avoid cyclic dependencies, but
- keep a dummy libfltk_cairo in 1.4.0 for backwards compatibility
- move cairo/Fl_Cairo.cxx to src/Fl_Cairo.cxx
- add preliminary Cairo support for Visual Studio (MSVC)

Static linking is not affected by this change, but users building
with hand-made Makefiles will have to remove libfltk_cairo starting
with FLTK 1.4.0. The dummy library can be linked for backwards
compatibility but it will be removed later (in 1.4.x or 1.5.0).

The shared FLTK library libfltk.{so|dylib|dll|..} depends on libcairo
if and only if FLTK is built with one of the Cairo options. This has
always been the case for OPTION_CAIROEXT but is now also true if only
OPTION_CAIRO is selected, i.e. FLTK programs linked with a Cairo
enabled shared FLTK library will also be linked with libcairo. The same
is true for configure options --enable-cairo and --enable-cairoext,
respectively.

Preliminary Cairo support for MSVC now detects a Cairo installation
using the CMake variable FLTK_CAIRO_DIR which must be set by the user.
Note that this feature is temporary and may be changed in the future
for a better and more comfortable version.

1 files changed, 37 insertions, 0 deletions

diff --git a/src/makedepend b/src/makedepend
index 74f3f2d87..bd259df7b 100644
--- a/src/makedepend
+++ b/src/makedepend
@@ -1279,6 +1279,23 @@ Fl_Button.o: ../FL/fl_utf8.h
 Fl_Button.o: ../FL/Fl_Widget.H
 Fl_Button.o: ../FL/Fl_Window.H
 Fl_Button.o: ../FL/platform_types.h
+Fl_Cairo.o: ../FL/Enumerations.H
+Fl_Cairo.o: ../FL/Fl.H
+Fl_Cairo.o: ../FL/fl_attr.h
+Fl_Cairo.o: ../FL/Fl_Bitmap.H
+Fl_Cairo.o: ../FL/Fl_Cairo.H
+Fl_Cairo.o: ../FL/fl_casts.H
+Fl_Cairo.o: ../FL/fl_config.h
+Fl_Cairo.o: ../FL/Fl_Export.H
+Fl_Cairo.o: ../FL/Fl_Group.H
+Fl_Cairo.o: ../FL/Fl_Image.H
+Fl_Cairo.o: ../FL/fl_types.h
+Fl_Cairo.o: ../FL/fl_utf8.h
+Fl_Cairo.o: ../FL/Fl_Widget.H
+Fl_Cairo.o: ../FL/Fl_Window.H
+Fl_Cairo.o: ../FL/platform.H
+Fl_Cairo.o: ../FL/platform_types.h
+Fl_Cairo.o: ../FL/x11.H
 Fl_Chart.o: ../config.h
 Fl_Chart.o: ../FL/Enumerations.H
 Fl_Chart.o: ../FL/Fl.H
@@ -2313,6 +2330,7 @@ Fl_Help_View.o: ../FL/Fl_RGB_Image.H
 Fl_Help_View.o: ../FL/Fl_Scrollbar.H
 Fl_Help_View.o: ../FL/Fl_Shared_Image.H
 Fl_Help_View.o: ../FL/Fl_Slider.H
+Fl_Help_View.o: ../FL/Fl_String.H
 Fl_Help_View.o: ../FL/fl_string_functions.h
 Fl_Help_View.o: ../FL/fl_types.h
 Fl_Help_View.o: ../FL/fl_utf8.h
@@ -3219,6 +3237,7 @@ Fl_Preferences.o: ../FL/fl_config.h
 Fl_Preferences.o: ../FL/Fl_Export.H
 Fl_Preferences.o: ../FL/Fl_Plugin.H
 Fl_Preferences.o: ../FL/Fl_Preferences.H
+Fl_Preferences.o: ../FL/Fl_String.H
 Fl_Preferences.o: ../FL/fl_string_functions.h
 Fl_Preferences.o: ../FL/fl_types.h
 Fl_Preferences.o: ../FL/fl_utf8.h
@@ -3613,6 +3632,22 @@ fl_shortcut.o: ../FL/platform_types.h
 fl_shortcut.o: flstring.h
 fl_shortcut.o: Fl_Screen_Driver.H
 fl_shortcut.o: Fl_System_Driver.H
+Fl_Shortcut_Button.o: ../config.h
+Fl_Shortcut_Button.o: ../FL/Enumerations.H
+Fl_Shortcut_Button.o: ../FL/Fl.H
+Fl_Shortcut_Button.o: ../FL/fl_attr.h
+Fl_Shortcut_Button.o: ../FL/Fl_Button.H
+Fl_Shortcut_Button.o: ../FL/Fl_Cairo.H
+Fl_Shortcut_Button.o: ../FL/fl_casts.H
+Fl_Shortcut_Button.o: ../FL/fl_config.h
+Fl_Shortcut_Button.o: ../FL/fl_draw.H
+Fl_Shortcut_Button.o: ../FL/Fl_Export.H
+Fl_Shortcut_Button.o: ../FL/Fl_Shortcut_Button.H
+Fl_Shortcut_Button.o: ../FL/fl_types.h
+Fl_Shortcut_Button.o: ../FL/fl_utf8.h
+Fl_Shortcut_Button.o: ../FL/Fl_Widget.H
+Fl_Shortcut_Button.o: ../FL/platform_types.h
+Fl_Shortcut_Button.o: flstring.h
 fl_show_colormap.o: ../config.h
 fl_show_colormap.o: ../FL/Enumerations.H
 fl_show_colormap.o: ../FL/Fl.H
@@ -3691,6 +3726,7 @@ Fl_Spinner.o: ../FL/Fl_Rect.H
 Fl_Spinner.o: ../FL/Fl_Repeat_Button.H
 Fl_Spinner.o: ../FL/Fl_Spinner.H
 Fl_Spinner.o: ../FL/Fl_Widget.H
+Fl_String.o: ../FL/Fl_Export.H
 Fl_String.o: ../FL/Fl_String.H
 fl_string_functions.o: ../FL/Enumerations.H
 fl_string_functions.o: ../FL/filename.H
@@ -4929,6 +4965,7 @@ gl_start.o: Fl_Gl_Window_Driver.H
 numericsort.o: ../FL/filename.H
 numericsort.o: ../FL/fl_config.h
 numericsort.o: ../FL/Fl_Export.H
+numericsort.o: ../FL/fl_utf8.h
 numericsort.o: ../FL/platform_types.h
 print_button.o: ../FL/Enumerations.H
 print_button.o: ../FL/Fl.H