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 |