<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 27, 2019, 4:58 AM Richard Purdie <<a href="mailto:richard.purdie@linuxfoundation.org">richard.purdie@linuxfoundation.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I've been trying to figure out why we get a weird build failure with<br>
hash equivalence enabled. Armin has also been searching for an odd<br>
issue with warrior and the qemu tests. I may have a lead.<br>
<br>
If you build a standard qemu:<br>
<br>
"bitbake qemu-system-native"<br>
<br>
and save off the resulting qemu-system-XXX binaries, then add:<br>
<br>
PACKAGECONFIG_append_pn-qemu-system-native = " gtk+"<br>
PACKAGECONFIG_append_pn-qemu-system-native = " virglrenderer"<br>
PACKAGECONFIG_append_pn-qemu-system-native = " glx"<br>
<br>
to local.conf, then:<br>
<br>
"bitbake qemu-system-native"<br>
<br>
it rebuilds as expected, save off the qemu-system-XXX binaries,<br>
<br>
then remove the local.conf entries and:<br>
<br>
"bitbake qemu-system-native -c configure -f"<br>
"bitbake qemu-system-native"<br>
<br>
then save off the resulting qemu-system-XXX binaries, you'll find that<br>
whilst these first and last sets should match, they don't. Its obvious<br>
with "ldd qemu-system-x86_64" that the linked libraries persist from<br>
the second to third set when they should not.<br>
<br>
The reason is that when configuration changes, autotools.bbclass will<br>
wipe out ${B} however qemu doesn't use the autotools class and hence B<br>
is not cleaned for changes in configuration.<br>
<br>
We could abstract the pieces of autotools.bbclass which do this into a<br>
separate class, or, easier, have qemu's do_configure wipe ${B}.<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Excellent catch. Any thoughts on how might be able to automate detection of such problems in the reproducible build QA test?</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Armin: This may be the issue you're searching for with warrior?<br>
<br>
Cheers,<br>
<br>
Richard<br>
<br>
-- <br>
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</blockquote></div></div></div>