In ChangePrinters tests, redirect stderr of `diff --help` to stdout

FreeBSD's diff writes its `--help` to stderr.
2022-11-17 04:04:15 -05:00 · 2022-11-17 04:04:15 -05:00 · 2d0a2e334e
parent 96a661de4b
commit 2d0a2e334e
1 changed files with 2 additions and 1 deletions
--- a/llvm/test/Other/ChangePrinters/lit.local.cfg
+++ b/llvm/test/Other/ChangePrinters/lit.local.cfg
@ -6,7 +6,8 @@ def have_needed_diff_support():
        return False

    ld_cmd = subprocess.Popen(
-        ['/usr/bin/diff', '--help'], stdout=subprocess.PIPE, env={'LANG': 'C'})
+        ['/usr/bin/diff', '--help'], stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT, env={'LANG': 'C'})
    ld_out = ld_cmd.stdout.read().decode()
    ld_cmd.wait()