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Warn about TMPDIR

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* doc/autoconf.texi (Initialization Macros): Warn about
setting TMPDIR, following up on this Paul Smith remark:
https://lists.gnu.org/r/autoconf/2022-10/msg00024.html
This commit is contained in:
Paul Eggert 2022-10-28 15:19:16 -07:00
parent d081ac3ec8
commit 3cc9b414aa
1 changed files with 4 additions and 0 deletions
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@ -14610,6 +14610,10 @@ leave the temporary directory behind. Hence it is important to use a
@var{prefix} that makes it easier to determine if a leftover temporary
directory from an interrupted script is safe to delete.
If you set @code{TMPDIR=$tmp} after invoking this macro, you should
reset @code{TMPDIR} before deleting the created directory, to avoid
breaking commands that rely on @code{$TMPDIR}.
The use of the output variable @samp{$tmp} rather than something in the
@samp{as_} namespace is historical; it has the unfortunate consequence
that reusing this otherwise common name for any other purpose inside