[binutils-gdb] [gdb/testsuite] Fix have_mpx test

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

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f0d49de4be0ba22457f19c96ec2cfa787da5b507

commit f0d49de4be0ba22457f19c96ec2cfa787da5b507
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Jun 16 15:11:26 2022 +0200

    [gdb/testsuite] Fix have_mpx test
    
    When testing on openSUSE Leap 15.4 I ran into this FAIL:
    ...
    FAIL: gdb.arch/i386-mpx-map.exp: NULL address of the pointer
    ...
    and likewise for all the other mpx tests.
    
    The problem is that have_mpx is supposed to return 0, but it doesn't because
    it tries to match this output:
    ...
    builtin_spawn -ignore SIGHUP temp/20294/have_mpx-2-20294.x^M
    No MPX support^M
    No MPX support^M
    ...
    using:
    ...
                       && ![string equal $output "No MPX support\r\n"]]
    ...
    
    Fix this by matching using a regexp instead.
    
    Tested on x86_64-linux.

Diff:
---
 gdb/testsuite/lib/gdb.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 75efc4a62d1..4bc5f4f144c 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -8479,7 +8479,7 @@ gdb_caching_proc have_mpx {
     set status [lindex $result 0]
     set output [lindex $result 1]
     set status [expr ($status == 0) \
-		    && ![string equal $output "No MPX support\r\n"]]
+		    && ![regexp "^No MPX support\r\n" $output]]
 
     remote_file build delete $obj