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<p>It looks like your compiler is being fussier than the C compiler.</p>
<p><br>
</p>
<p>Specifically, the problem appears to be with the enum type. The C compiler is happy to let pass using a short (cr_flags) where an enum is called for (argument to changelog_rec_offset). In C, I think an enum is an int (so passing in a short like this is
always fine). I guess in C++ either enum is not an int, or it's just fussier.</p>
<p><br>
</p>
<p>There might be a compiler flag to make it not error on this? I am not familiar with icpc, so I can't help with specifics.<br>
<br>
You might also try a different C++ compiler, to see if it has a different attitude towards that error.</p>
<p><br>
</p>
<p>One further thought, though:<br>
This is a C header. Presumably, it is not intended to be included directly in a C++ project?</p>
<p><br>
</p>
<p>- Patrick</p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> lustre-discuss <lustre-discuss-bounces@lists.lustre.org> on behalf of François Tessier <ftessier@anl.gov><br>
<b>Sent:</b> Wednesday, March 15, 2017 2:00:31 PM<br>
<b>To:</b> lustre-discuss@lists.lustre.org<br>
<b>Subject:</b> [lustre-discuss] Compile a C++ app. using the Lustre API</font>
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<div class="PlainText">Hi All,<br>
<br>
I'm working on a piece of code using the Lustre API. To do so, I include<br>
lustreapi.h. When I compile my code with a C compiler (icc), everything<br>
is fine. However, when I compile it with a C++ compiler (icpc), I get<br>
these errors:<br>
<br>
---------------------------------<br>
<br>
In file included from /usr/include/lustre/lustreapi.h(47),<br>
from topo.c(5):<br>
/usr/include/lustre/lustre_user.h(914): error: argument of type "__u16={unsigned short}" is incompatible with parameter of type "changelog_rec_flags"<br>
return changelog_rec_offset(rec->cr_flags);<br>
^<br>
<br>
In file included from /usr/include/lustre/lustreapi.h(47),<br>
from topo.c(5):<br>
/usr/include/lustre/lustre_user.h(925): error: a value of type "int" cannot be used to initialize an entity of type "changelog_rec_flags"<br>
enum changelog_rec_flags crf = rec->cr_flags & CLF_VERSION;<br>
^<br>
<br>
In file included from /usr/include/lustre/lustreapi.h(47),<br>
from topo.c(5):<br>
/usr/include/lustre/lustre_user.h(935): error: a value of type "int" cannot be used to initialize an entity of type "changelog_rec_flags"<br>
enum changelog_rec_flags crf = rec->cr_flags &<br>
^<br>
<br>
In file included from /usr/include/lustre/lustreapi.h(47),<br>
from topo.c(5):<br>
/usr/include/lustre/lustre_user.h(945): error: argument of type "int" is incompatible with parameter of type "changelog_rec_flags"<br>
return (char *)rec + changelog_rec_offset(rec->cr_flags &<br>
^<br>
<br>
In file included from /usr/include/lustre/lustreapi.h(47),<br>
from topo.c(5):<br>
/usr/include/lustre/lustre_user.h(986): error: this operation on an enumerated type requires an applicable user-defined operator function<br>
crf_wanted &= CLF_SUPPORTED;<br>
^<br>
<br>
In file included from /usr/include/lustre/lustreapi.h(47),<br>
from topo.c(5):<br>
/usr/include/lustre/lustre_user.h(997): error: argument of type "int" is incompatible with parameter of type "changelog_rec_flags"<br>
changelog_rec_offset(crf_wanted & ~CLF_JOBID);<br>
^<br>
<br>
In file included from /usr/include/lustre/lustreapi.h(47),<br>
from topo.c(5):<br>
/usr/include/lustre/lustre_user.h(999): error: argument of type "int" is incompatible with parameter of type "changelog_rec_flags"<br>
changelog_rec_offset(crf_wanted & ~(CLF_JOBID | CLF_RENAME));<br>
^<br>
<br>
Makefile:10: recipe for target 'topo' failed<br>
make: *** [topo] Error 2<br>
<br>
---------------------------------<br>
<br>
It's probably more a compiler issue than a Lustre one but a solution<br>
could help other users or Lustre developers.<br>
<br>
Any idea?<br>
<br>
Thanks,<br>
<br>
François<br>
<br>
<br>
-- <br>
--<br>
François TESSIER, Ph.D.<br>
Postdoctoral Appointee<br>
Argonne National Laboratory<br>
LCF Division - Bldg 240, 4E 19<br>
Tel : +1 (630)-252-5068<br>
<a href="http://www.francoistessier.info">http://www.francoistessier.info</a><br>
<br>
_______________________________________________<br>
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<a href="http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org">http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org</a><br>
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