Usually these segfaults are toolchain bugs (I've had at least 8,
including gcc, suncc, libc...).


Just a couple of observations:

  - The bot builds with -DCONFIG_32=1 -DANSI=1 despite being PPC64.

  - When we had an AIX snakebite machine, the xlc compile worked on
    AIX (using about 50 obscure command line arguments).

  - In the default build, libmpdec functions use a lot of stack
    memory (for optimization while avoiding alloca). But there are
    no recursive tests, so a stack overflow would seem unlikely.