Apparently dlamch used to be compiled on Fedora with -Os
optimization. May be it was OK before, but now it is definitely too
much. When i recompiled dlamch with  "-ffloat-store -O0"
(as well as slamch and few others,
actually I just replaced -Os flag in the Makefile with "-ffloat-store -O0)
lapack works fine.
I am not sure if -ffloat-store is redundant in this context, but I
decided it would not hurt.

I filled a bug report against lapack on Fedora's bugzilla:

https://bugzilla.redhat.com/show_bug.cgi?id=520518

FYI.

Dmitri.
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