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-rw-r--r--docs/customize-rootfs.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/customize-rootfs.txt b/docs/customize-rootfs.txt
index 3518d15bb..54846dba5 100644
--- a/docs/customize-rootfs.txt
+++ b/docs/customize-rootfs.txt
@@ -21,3 +21,9 @@ You can also point to another directory via:
You can start with the example configuration files from +root_*+.
The +extra+ directory will never be deleted by any clean target to avoid
loss of customized configuration data.
+
+Another option is to configure a post-build action. This is available
+in +Global settings+. It must point to a script relative to the root
+of your openadk working copy. It will be invoked as part of the
++*-imageinstall+ step with $ADK_TOPDIR as first argument. You can use
+it e.g. to modify the +root_*+ filesystem before bundling it.