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-rw-r--r--gis/opencpn/README8
1 files changed, 6 insertions, 2 deletions
diff --git a/gis/opencpn/README b/gis/opencpn/README
index 8ebae45b1e..1c6dfc8736 100644
--- a/gis/opencpn/README
+++ b/gis/opencpn/README
@@ -3,5 +3,9 @@ plotter and navigation software, for use underway or as a planning
tool. OpenCPN is developed by a team of active sailors using real
world conditions for program testing and refinement.
-wxGTK is a required dependency, however you can use wxGTK3 or
-wxPython instead of wxGTK if you prefer.
+wxGTK3 is a required dependency, however you can use wxGTK or
+wxPython instead if you prefer. If decide to use wxGTK you will
+have to recompile wxGTK with the --enable-graphics_ctx option
+because it is not enabled in the default slackbuild and is
+required by opencpn. The --enable-graphics_ctx option is enabled
+by default in the wxGTK3 and wxPython slackbuilds.