<div style="font-family: Helvetica; font-size: 13px; ">The only assignment operator that forces immediate expansion is :=. Otherwise expansion always occurs when the value is used. This is inspired by the behavior of GNU Make. See http://www.gnu.org/software/make/manual/html_node/Flavors.html#Flavors for details of how it works there.<br></div>
<div><div><br></div><div>-- </div><div>Christopher Larson</div><div><br></div></div>
<p style="color: #A0A0A8;">On Tuesday, June 19, 2012 at 1:49 PM, Robert P. J. Day wrote:</p>
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<span><div><div><div>On Tue, 19 Jun 2012, Paul Eggleton wrote:</div><div><br></div><blockquote type="cite"><div><div>On Tuesday 19 June 2012 12:28:22 Robert P. J. Day wrote:</div><div><br></div><blockquote type="cite"><div> finally, what are the evaluation mechanics of the "?=" operator?</div></blockquote><div><br></div><div>?= is the same as = except that it only sets the value if it is not</div><div>already set at the time the line is parsed.</div></div></blockquote><div><br></div><div> just so i don't come across as a total idiot, i did understand that</div><div>"?=" is a conditional assignment -- my question was whether it had</div><div>immediate evaluation semantics like ":=" or delayed evaluation</div><div>semantics like "=", and you appear to have answered that. thanks.</div><div><br></div><div>rday</div><div><br></div><div>-- </div><div><br></div><div>========================================================================</div><div>Robert P. J. Day Ottawa, Ontario, CANADA</div><div> <a href="http://crashcourse.ca">http://crashcourse.ca</a></div><div><br></div><div>Twitter: <a href="http://twitter.com/rpjday">http://twitter.com/rpjday</a></div><div>LinkedIn: <a href="http://ca.linkedin.com/in/rpjday">http://ca.linkedin.com/in/rpjday</a></div><div>========================================================================</div><div><br></div><div>_______________________________________________</div><div>Openembedded-core mailing list</div><div><a href="mailto:Openembedded-core@lists.openembedded.org">Openembedded-core@lists.openembedded.org</a></div><div><a href="http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core">http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core</a></div></div></div></span>
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