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Document the CLEANS variable

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Also shows how to be backwards-compatible with the 3.14 build
system.
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Andrew Johnson
2012-10-05 22:58:59 -05:00
parent 2f25d7c9c9
commit f0c88c3d3c
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documentation/RELEASE_NOTES.html
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@@ -78,6 +78,26 @@ for a while in case anyone still needs them.</p>
<h2 align="center">Changes between 3.14.x and 3.15.0.1</h2>
<h3>Application clean rules</h3>
<p>The <tt>clean</tt> Makefile target has changed between a single-colon rule
and a double-colon rule more than once in the life of the EPICS build rules, and
it just changed back to a single-colon rule, but now we recommend that
applications that wish to provide a Makefile that is backwards compatible with
the 3.14 build rules use the construct shown below. The 3.15 rules now support
a variable called <tt>CLEANS</tt> to which a Makefile can add a list of files to
be deleted when the user does a <tt>make clean</tt> like this:</p>
<blockquote><pre>CLEANS += &lt;list of files to be cleaned&gt;
ifndef BASE_3_15
clean::
$(RM) $(CLEANS)
endif</pre></blockquote>
<p>The conditional rule provides compatibility for use with the 3.14 build
system.</p>
<h3>MSI included with Base</h3>
<p>An enhanced version of the Macro Substitution and Include program <q>msi</q>