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-rw-r--r--FL/Fl_Cairo_Window.H3
1 files changed, 3 insertions, 0 deletions
diff --git a/FL/Fl_Cairo_Window.H b/FL/Fl_Cairo_Window.H
index bfef5730b..1111097c5 100644
--- a/FL/Fl_Cairo_Window.H
+++ b/FL/Fl_Cairo_Window.H
@@ -74,6 +74,9 @@
\see examples/cairo-draw-x.cxx
\see test/cairo_test.cxx
+
+ \note Class Fl_Cairo_Window requires the FLTK library to have been built with
+ CMake option OPTION_CAIRO or configure --enable-cairo.
\note You can alternatively define your custom cairo FLTK window,
and thus at least override the draw() method to provide custom cairo