Re: Floating Point Exception when running arm-linuc-gcc on another PC

["Martin Guy" <martinwguy at yahoo dot it>]

2007/9/7, Pelle Svensson <pelle2004@hotmail.com>:
> I get "Floating Point Exception" when I run arm-linuc-gcc.
>
> My problem starts when I copy the crosstool-directory to another PC.

Different CPUs have different sets of instructions; crosstool has
auto-configured to use the instructions your first PC has, and has
used instructions your other PC does not implement.

Assuming you are using x86 processors, cat /proc/cpuinfo and look at
the "Flags" line on each.
You need to make sure the code generated by your crosstool is for a
minimal subset of instructions that all your PCs have.

Something like adding -march=i386 to GCC_EXTRA_CONFIG in your dat file
would be a very cautious choice :)
See http://www.freaknet.org/martin/crosstool/crosstool-vars.html for a
list of the various config variables and what they do, and "man gcc"
to find the optimal -mcpu= or -march= setting for your setup.

    M

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