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Editorial Team
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Asked: 2026-06-18T10:18:43+00:00

I need to find why fftw is segfaulting, in an application which built OK

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I need to find why fftw is segfaulting, in an application which built OK on 32-bit target with gcc4.0 and now fails on a 64-bit target with gcc4.6.

The fftw configure options:

  • –enable-debug
  • –enable-debug-malloc
  • –enable-debug-alignment

only appear to add internal debug, I was hoping to get somewhere by turning on gdb debug symbols so I can try to trace the cause of the segfault. Is there an option for gdb debug that I’ve missed somehow?

Alternatively, is there any other way I should be trying to track down a segfault in fftw?

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1 Answer

  1. Editorial Team

    As noted in my comments above, the answer was to edit the Makefile produced by fftw3’s configure to add -ggdb to the CFLAGS.

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