From 752e03a7c1ac5f3539c3294d71d943269e442643 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Le=20Gouguec?= <legouguec@adacore.com>
Date: Mon, 20 May 2024 17:22:50 +0200
Subject: gdb: Fix Windows build after #include shuffle
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Without this patch, the build chokes on:

    ../../src/gdb/windows-nat.c:384:21: error: field 'm_debug_event_pending' has incomplete type 'std::atomic<bool>'
      384 |   std::atomic<bool> m_debug_event_pending { false };
          |                     ^~~~~~~~~~~~~~~~~~~~~
    In file included from […gcc tree…]/include/c++/13.2.1/bits/shared_ptr_atomic.h:33,
                     from […gcc tree…]/include/c++/13.2.1/memory:81,
                     from ../../src/gdb/../gdbsupport/gdb_unique_ptr.h:23,
                     from ../../src/gdb/../gdbsupport/common-utils.h:26,
                     from ../../src/gdb/../gdbsupport/common-defs.h:199,
                     from ./../../src/gdb/defs.h:26,
                     from <command-line>:
    […gcc tree…]/include/c++/13.2.1/bits/atomic_base.h:174:12: note: declaration of 'struct std::atomic<bool>'
      174 |     struct atomic;
          |            ^~~~~~
    make.exe[2]: *** [Makefile:1947: windows-nat.o] Error 1

Presumably windows-nat.c relied on objfiles.h including <atomic>,
which was undone in 2024-05-16 "gdb: remove unused includes in
objfiles.{c,h}" (f617661c110).
---
 gdb/windows-nat.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index 70f955d..e4feea1 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -41,6 +41,7 @@
 #include <cygwin/version.h>
 #endif
 #include <algorithm>
+#include <atomic>
 #include <vector>
 #include <queue>
 
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