[PATCH][gdb/testsuite] Handle missing xz in gdb.base/gnu-debugdata.exp

[Tom de Vries <tdevries@suse.de>]

Hi,

When running test-case gdb.base/gnu-debugdata.exp on SLE-11, I run into:
...
FAIL: gdb.base/gnu-debugdata.exp: xz
...

The fact that xz is not installed does not mean there's a fail, merely that
the test is unsupported.

Fix this by detecting the "spawn failed" reply in run_on_host and issuing
UNSUPPORTED instead.

Tested on x86_64-linux.

Any comments?

Thanks,
- Tom

[gdb/testsuite] Handle missing xz in gdb.base/gnu-debugdata.exp

gdb/testsuite/ChangeLog:

2020-12-14  Tom de Vries  <tdevries@suse.de>

	PR testsuite/26963
	* lib/gdb.exp (run_on_host): Declare test unsupported if spawn fails.

---
 gdb/testsuite/lib/gdb.exp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 071b5afa99..083589d895 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -7047,7 +7047,11 @@ proc run_on_host { test program args } {
  	return 0
     } else {
 	verbose -log "run_on_host failed: $output"
-	fail $test
+	if { $output == "spawn failed" } {
+	    unsupported $test
+	} else {
+	    fail $test
+	}
 	return -1
     }
 }