[DragonFlyBSD - Bug #1740] (Closed) Linux emulation: -ffast-math causes floating point exception

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Mon Jan 19 04:29:21 PST 2015

Issue #1740 has been updated by tuxillo.

Description updated
Category set to Kernel
Status changed from New to Closed
Assignee deleted (0)
Target version set to 4.2.x


Only i386 has linux emulation and i386 is no longer supported since 3.8 so closing this one.

Antonio Huete

Bug #1740: Linux emulation: -ffast-math causes floating point exception

* Author: Johannes.Hofmann
* Status: Closed
* Priority: Normal
* Assignee: 
* Category: Kernel
* Target version: 4.2.x
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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