[PATCH] [gdb/build] Fix build breaker with -std=c++11

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

When building with -std=c++11 I run into:
...
gdb/dwarf2/cooked-index.c: In member function \
  ‘void cooked_index::start_writing_index(dwarf2_per_bfd*)’:
gdb/dwarf2/cooked-index.c:469:10: error: lambda capture initializers only \
  available with -std=c++14 or -std=gnu++14 [-Werror]
          ctx = std::move (ctx)] ()
          ^~~
...

Fix this by capturing a copy instead:
...
    = gdb::thread_pool::g_thread_pool->post_task ([this, per_bfd, ctx] ()
...

Tested on x86_64-linux.

Reported-By: Tom Tromey <tom@tromey.com>
---
 gdb/dwarf2/cooked-index.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/gdb/dwarf2/cooked-index.c b/gdb/dwarf2/cooked-index.c
index df82e86b690..87aac5aaa8b 100644
--- a/gdb/dwarf2/cooked-index.c
+++ b/gdb/dwarf2/cooked-index.c
@@ -465,8 +465,7 @@ cooked_index::start_writing_index (dwarf2_per_bfd *per_bfd)
   /* This must be set after all the finalization tasks have been
      started, because it may call 'wait'.  */
   m_write_future
-    = gdb::thread_pool::g_thread_pool->post_task ([this, per_bfd,
-						   ctx = std::move (ctx)] ()
+    = gdb::thread_pool::g_thread_pool->post_task ([this, per_bfd, ctx] ()
 	{
 	  maybe_write_index (per_bfd, ctx);
 	});

base-commit: 5e66f55c62e306afbcc93856bf06e542ddd00997
-- 
2.35.3