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-rw-r--r--config.h.in3
1 files changed, 2 insertions, 1 deletions
diff --git a/config.h.in b/config.h.in
index 9f235f7d1..16fb08f2c 100644
--- a/config.h.in
+++ b/config.h.in
@@ -362,7 +362,8 @@
* FLTK_HAVE_PEN_SUPPORT
*
* Do we have pen/tablet support for the current platform?
- * See CMake option FLTK_OPTION_PEN_SUPPORT
+ * See CMake option FLTK_OPTION_PEN_SUPPORT, but note that a build test
+ * (try_compile()) is performed to test if the option is available
*
* Note: this option is "hidden" in 'config.h', i.e. it's not (yet)
* publicly accessibe. Move this to 'fl_config.h' to make it public.