279 |
# AS_UNSET depends upon $as_unset: compute it. |
# AS_UNSET depends upon $as_unset: compute it. |
280 |
# Use MAIL to trigger a bug in Bash 2.01; |
# Use MAIL to trigger a bug in Bash 2.01; |
281 |
# the "|| exit" suppresses the resulting "Segmentation fault" message. |
# the "|| exit" suppresses the resulting "Segmentation fault" message. |
282 |
|
# Avoid 'if ((', as that triggers a bug in pdksh 5.2.14. |
283 |
m4_defun([_AS_UNSET_PREPARE], |
m4_defun([_AS_UNSET_PREPARE], |
284 |
[# Support unset when possible. |
[# Support unset when possible. |
285 |
if ((MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then |
if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then |
286 |
as_unset=unset |
as_unset=unset |
287 |
else |
else |
288 |
as_unset=false |
as_unset=false |