[FFmpeg-devel] [PATCH] configure: Improve the check for the rsync --contimeout option

["Martin Storsjö" <martin@martin.st>]

Traditionally, macOS has shipped an old version of rsync that lacked
support for this version, hence this check (added in
a8b3f0c5cf548f654e30c981988bb71981a3f8d3).

However, in macOS 15.x, they have switched to providing rsync as a
different tool, openrsync. The version of openrsync in at least
macOS 15.2 does include "[--contimeout]" (note the lack of "=" after
the option), in the output of "rsync --help", but when used, the tool
errors out with "rsync: --contimeout=60: unknown option". So apparently
the tool erroenously lists the option as supported, while it really
isn't.

The original rsync tool prints "--contimeout=SECONDS" in the output
of "rsync --help".

It is unclear which version of openrsync this is; the latest upstream
openrsync from OpenBSD does support the option and includes
"[--contimeout=seconds]" in the output of "--help", and older versions
don't seem to include the option as listed at all.

Therefore, check for "--conntimeout=" with the "=", this should
properly detect both new enough rsync and openrsync.

This fixes running "fate-rsync" on macOS 15.x.
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 3a1e72e1c6..06f641ead0 100755
--- a/configure
+++ b/configure
@@ -7209,7 +7209,7 @@ enabled makeinfo \
 disabled makeinfo_html && texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
 perl -v            > /dev/null 2>&1 && enable perl      || disable perl
 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
-rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || disable rsync_contimeout
+rsync --help 2> /dev/null | grep -q 'contimeout=' && enable rsync_contimeout || disable rsync_contimeout
 xmllint --version  > /dev/null 2>&1 && enable xmllint   || disable xmllint
 
 check_headers linux/fb.h
-- 
2.39.5 (Apple Git-154)

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