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-rw-r--r--docs/manual/customize-outside-br.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/docs/manual/customize-outside-br.txt b/docs/manual/customize-outside-br.txt
index 9ad177d006..be1827e6ba 100644
--- a/docs/manual/customize-outside-br.txt
+++ b/docs/manual/customize-outside-br.txt
@@ -107,3 +107,17 @@ And then in +$(BR2_EXTERNAL)/package/package1+ and
output of +make list-defconfigs+ and allow them to be loaded with the
normal +make <name>_defconfig+ command. They will be visible under the
+User-provided configs+' label in the 'make list-defconfigs' output.
+
+Additionally, an +external.mk+ file may define the +help-custom+ make
+rule, to document custom make targets specific to this +BR2_EXTERNAL+
+tree. The help is completely free-form.
+
+------
+help-custom:
+ @echo 'Here goes your local help, where you may'
+ @echo 'describe some custom rules:'
+ @echo ' my-rule - do something'
+ @echo ' my-other-rule - do something else'
+ @echo
+ @echo 'Please contact support@company.com in case of problem.'
+------
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