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Re: Bug#1067907: flam3-genome segfaults on ppc64el with -ffast-math enabled



On 2025-08-01 16:01, Peter Blackman wrote:
Hi Trupti,

Just to be sure this is not an own goal,
I attach a series file that comments out
all the non essential patches.


From the gcc man page, -ffast-math enables the following optimisations

-fno-math-errno
-funsafe-math-optimizations
-ffinite-math-only
-fno-rounding-math
-fno-signaling-nans
-fcx-limited-range
-fexcess-precision=fast

Maybe enable individually or as groups to determine
which triggers the segfault?

Hi Peter,

As per the list of flags you provided, I tested each one to identify which flag triggers the segmentation fault.

I found that the -ffinite-math-only flag is the cause of the segmentation fault.

Thanks and Regards,
Trupti


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