[committed][gdb/testsuite] Require c++11 for gdb.base/align.exp

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

Hi,

When building gdb on ubuntu 16.04 with gcc 5.4.0, and running the gdb
testsuite we run into a failure due to align.exp requiring at least c++11.

Fix this by adding -std=c++11.

Tested on x86_64-linux.

Committed to trunk.

Thanks,
- Tom

[gdb/testsuite] Require c++11 for gdb.base/align.exp

gdb/testsuite/ChangeLog:

2019-05-22  Tom de Vries  <tdevries@suse.de>

	* gdb.base/align.exp: Require c++11.

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

diff --git a/gdb/testsuite/gdb.base/align.exp b/gdb/testsuite/gdb.base/align.exp
index e3ca0470e9..8fe209e07c 100644
--- a/gdb/testsuite/gdb.base/align.exp
+++ b/gdb/testsuite/gdb.base/align.exp
@@ -135,8 +135,12 @@ proc run_alignment_test { lang } {
 
     set filename [prepare_test_source_file $lang]
 
+    set flags {debug}
+    if { "$lang" == "c++" } {
+	lappend flags "additional_flags=-std=c++11"
+    }
     standard_testfile $filename
-    if {[prepare_for_testing "failed to prepare" "$lang/$testfile" $srcfile {debug}]} {
+    if {[prepare_for_testing "failed to prepare" "$lang/$testfile" $srcfile $flags]} {
 	return -1
     }