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OK, I give up. Which library is the function __setfpucw in? The man page does not say. Running strings on libc.a shows that its name occurs in that library, and 'ar t libc.a' shows that it contains a module named setfpucw.o. But when I try to call the function, I get an unresolved reference error in the linking stage. BTW, I am trying to change the fpu from 80 bit mode to 64 bit mode. I wrote a wrapper routine to call _setfpucw from a fortran program. I get the same error when I try to explicitly link with libc.a from g77, and when I call the wrapper from a c main function and compile with gcc. Thanks, Ray -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/