TestCommon: older strace does not have --version

The tests will check for strace >= 4.16, but version 4.24 that I have
does not accept --version, only -V. This works for both older and newer
strace, so switch to using "strace -V" for the check.

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index caf709c2..a5546905 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -956,9 +956,9 @@ sub strace_inject (;$) {
         my $cmd = strace(@_);
         state $ver = do {
                 require PublicInbox::Spawn;
-                my $v = PublicInbox::Spawn::run_qx([$cmd, '--version']);
+                my $v = PublicInbox::Spawn::run_qx([$cmd, '-V']);
                 $v =~ m!version\s+([1-9]+\.[0-9]+)! or
-                                xbail "no strace --version: $v";
+                                xbail "no strace -V: $v";
                 eval("v$1");
         };
         $ver ge v4.16 or skip "$cmd too old for syscall injection (".