* Restore SIGPIPE to SIG_DFL when running the builder.  This prevents   subtle and often hard-to-reproduce bugs where programs in pipes   either barf with a "Broken pipe" message or not, depending on the   exact timing conditions.  This particularly happened in GNU M4 (and   Bison, which uses M4).
* Restore SIGPIPE to SIG_DFL when running the builder.  This prevents
  subtle and often hard-to-reproduce bugs where programs in pipes
  either barf with a "Broken pipe" message or not, depending on the
  exact timing conditions.  This particularly happened in GNU M4 (and
  Bison, which uses M4).


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