/[autoconf]/autoconf/lib/m4sugar/m4sh.m4
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revision 1.98 by bonzini, Thu May 22 21:39:45 2003 UTC revision 1.99 by eggert, Fri Aug 1 01:10:58 2003 UTC
# Line 276  fi Line 276  fi
276  # _AS_UNSET_PREPARE  # _AS_UNSET_PREPARE
277  # -----------------  # -----------------
278  # AS_UNSET depends upon $as_unset: compute it.  # AS_UNSET depends upon $as_unset: compute it.
279    # Use MAIL to trigger a bug in Bash 2.01;
280    # the "|| exit" suppresses the resulting "Segmentation fault" message.
281  m4_defun([_AS_UNSET_PREPARE],  m4_defun([_AS_UNSET_PREPARE],
282  [# Support unset when possible.  [# Support unset when possible.
283  if (as_foo=foo; unset as_foo) >/dev/null 2>&1; then  if ((MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
284    as_unset=unset    as_unset=unset
285  else  else
286    as_unset=false    as_unset=false

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