Document D_PPP_ prefix for macros

(cherry picked from commit 7556987e03558cd2f200df996ee222da58e5889c)
Signed-off-by: Nicolas R <atoomic@cpan.org>

diff --git a/dist/Devel-PPPort/HACKERS b/dist/Devel-PPPort/HACKERS
index 1db7f34..ff215a4 100644 (file)
--- a/dist/Devel-PPPort/HACKERS
+++ b/dist/Devel-PPPort/HACKERS
@@ -244,6 +244,13 @@ the line C<__UNDEFINED__> to the C<=provides> section to get all macros
 implemented this way to be imported into this section, so they all get
 documented as being provided.
 
+If you need to define a helper macro which is not part of C<Devel::PPPort> API
+and its usage is only for definition of other C<Devel::PPPort> macros then use
+the C<D_PPP_> prefix for this macro name (e.g. C<D_PPP_SVPV_NOLEN_LP_ARG>).
+Some C<Devel::PPPort> scripts would report a warning when there is defined a
+macro which is not part of Perl public API, except those macros which start
+with the C<D_PPP_> prefix.
+
 Version checking can be tricky if you want to do it correct.
 You can use