* doc/autoconf.texi (Limitations of Usual Tools):
Mention a few more GNU ‘find’ options that are not portable.
Modernize a bit.
---
doc/autoconf.texi | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index db736c7f..17a6326e 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -19500,13 +19500,17 @@ Tru64/OSF 5.1 @command{fgrep} does not match an empty
pattern.
@item @command{find}
@c -----------------
@prindex @command{find}
-The @option{-maxdepth} option seems to be GNU specific.
-Tru64 v5.1, NetBSD 1.5 and Solaris @command{find}
-commands do not understand it.
+Many operands of GNU @command{find} are not standardized by Posix and
+are missing on many platforms. These nonportable operands include
+@option{-follow}, @option{-maxdepth}, @option{-mindepth},
+@option{-printf}, and @option{,}. See the
+@uref{https://@/pubs.opengroup.org/@/onlinepubs/@/9699919799/@/utilities/@/find.html,
+Posix spec for @command{find}} for @command{find} operands that
+should be portable nowadays.
The replacement of @samp{@{@}} is guaranteed only if the argument is
exactly @emph{@{@}}, not if it's only a part of an argument. For
-instance on DU, and HP-UX 10.20 and HP-UX 11:
+instance, on HP-UX 11:
@example
$ @kbd{touch foo}
@@ -19516,6 +19520,7 @@ $ @kbd{find . -name foo -exec echo "@{@}-@{@}" \;}
@noindent
while GNU @command{find} reports @samp{./foo-./foo}.
+Posix allows either behavior.
@anchor{grep}
--
2.30.2
