This is a bug in the Cray compiler. They cannot and should not set the __GNUC__ flag unless they are fully compatible with GCC. There are many ways to define "fully compatible" but at a minimum, code that compiles with GCC needs to compile with any compiler that elects to define __GNUC__. It is prudent to impose a higher standard in some cases but that's not pertinent to this discussion.
Lots of vendor compilers pretend to be __GNUC__ for any number of reasons. I believe that they are all wrong for doing it. Regarding this specific issue, there is nothing wrong with hwloc and I don't know why anyone should bother trying to fix Cray's problem, but I suspect that pragmatism will prevail, as it appears to have in the case of Boost (http://www.boost.org/doc/libs/1_52_0/boost/config/select_platform_config.hpp). I'll reproduce this locally and contact Cray directly about fixing this on their end. Best, Jeff On Thu, Jan 17, 2013 at 12:19 PM, Erik Schnetter <schnet...@gmail.com> wrote: > hwloc-1.6.1rc2 fails to build with the Cray compiler > > Cray C : Version 8.1.2 Thu Jan 17, 2013 12:18:54 > > The error message is > > CC bitmap.lo > CC-147 craycc: ERROR > Declaration is incompatible with "int ffsl(long)" (declared at line 526 of > "/opt/cray/xe-sysroot/4.1.20/usr/include/string.h"). > > (Yes, there is no line number with the error message.) > > This seems to be caused by the fact that the Cray compiler sets __GNUC__, > but is not quite compatible. A work-around is to change line 56 of > include/private/misc.h from > > #elif defined(__GNUC__) > > to > > #elif defined(__GNUC__) && !defined(_CRAYC) > > -erik > > -- > Erik Schnetter <schnet...@gmail.com> > http://www.perimeterinstitute.ca/personal/eschnetter/ > > _______________________________________________ > hwloc-users mailing list > hwloc-us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users -- Jeff Hammond Argonne Leadership Computing Facility University of Chicago Computation Institute jhamm...@alcf.anl.gov / (630) 252-5381 http://www.linkedin.com/in/jeffhammond https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond
