DragonFly bugs List (threaded) for 2010-04
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Linux emulation: -ffast-math causes floating point exception
Some Linux binaries compiled with -ffast-math crash with floating
point exception. There also is a warning in dmesg:
FXRSTR: illegal FP MXCSR 00009fc0 didinit = 0
This is a bit unfortunate as for some reason the procps package
(pkill, pgrep, uptime, etc) is compiled with the -ffast-math switch
and the utilities crash.
The following mini-program shows the crash when compiled with
-ffast-math (as Linux binary):
#include <stdio.h>
int main(int argc, char **argv) {
double d;
scanf("%lf", &d);
printf("%f\n", d);
}
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