[binutils-gdb] [gdb/testsuite] Fix gdb.tui/tui-nl-filtered-output.exp for remote host

[Tom de Vries <vries@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=b91f16040a6a531e010fc4e798f03159832fdd6a

commit b91f16040a6a531e010fc4e798f03159832fdd6a
Author: Tom de Vries <tdevries@suse.de>
Date:   Mon Mar 13 17:20:09 2023 +0100

    [gdb/testsuite] Fix gdb.tui/tui-nl-filtered-output.exp for remote host
    
    When running test-case gdb.tui/tui-nl-filtered-output.exp with host board
    local-remote-host-notty and target board native-gdbserver, I get:
    ...
    FAIL: gdb.tui/tui-nl-filtered-output.exp: check printf output
    ...
    
    The problem is that Term::enter_tui is returning 0, but the test-case doesn't
    check for this, and consequently runs unsupported tests.
    
    Fix this by adding the missing check.
    
    Tested on x86_64-linux.

Diff:
---
 gdb/testsuite/gdb.tui/tui-nl-filtered-output.exp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.tui/tui-nl-filtered-output.exp b/gdb/testsuite/gdb.tui/tui-nl-filtered-output.exp
index 5b1d6b7d9ba..8f85ae7ce49 100644
--- a/gdb/testsuite/gdb.tui/tui-nl-filtered-output.exp
+++ b/gdb/testsuite/gdb.tui/tui-nl-filtered-output.exp
@@ -36,7 +36,10 @@ tuiterm_env
 
 # Setup and enter TUI mode.
 Term::clean_restart 24 80
-Term::enter_tui
+if {![Term::enter_tui]} {
+    unsupported "TUI not supported"
+    return
+}
 
 # Send the command, and check the output is correctly split over
 # multiple lines.