Maik, As far as I can see in my build logs, this is nothing that is induced by EasyBuild. It seems as if the configure scripts of various math libraries needed to build GCC (i.e., GMP, isl, etc.) set these flags automatically based on the host architecture. To fix this behavior, you need to figure out how to convince the configure scripts to use a "conservative" setting and then modify the GCC easyblock accordingly.
Markus On 04/13/2017 03:57 PM, Maik Schmidt wrote: > Nope, wasn't that. Even when explictly setting --optarch=GENERIC on the > eb call, it uses whatever the host architecture is in the second and > third build stages, e.g. "-march=haswell -mtune=haswell" > > Am 13.04.2017 um 11:53 schrieb Maik Schmidt: >> Okay, I think it might be due to the fact that GCC/GCCcore are >> actually built with the dummy toolchain and so my compiler-specific >> optarch that only includes "Intel" and "GCC" is not applied there. Can >> I also add "dummy" to the optarch as another toolchain? >> >> Best, >> Maik >> >> Am 13.04.2017 um 10:13 schrieb Maik Schmidt: >>> I have noticed that when doing a GCC/GCCcore build, it always uses >>> the HOST architecture for -march and -mtune starting in compile stage >>> 2, even though I have set something else via optarch. This is a real >>> problem for heterogenous clusters if you do not make sure that the >>> build host always is one with the oldest architecture, because then >>> it leads to the error: >>> >>> "internal compiler error: Illegal instruction" >>> >>> when the resulting GCC is used on an older node. >>> >>> Is this a known issue, or is there a way to make the GCC build >>> process respect what EasyBuild sets as the target architecture, even >>> during the later compile stages? >>> >>> Thank you kindly in advance. >>> >> >> > > -- Dr. Markus Geimer Juelich Supercomputing Centre Institute for Advanced Simulation Forschungszentrum Juelich GmbH 52425 Juelich, Germany Phone: +49-2461-61-1773 Fax: +49-2461-61-6656 E-Mail: [email protected] WWW: http://www.fz-juelich.de/jsc ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzender des Aufsichtsrats: MinDir Dr. Karl Eugen Huthmacher Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, Prof. Dr. Sebastian M. Schmidt ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------
