gdb: include <mutex> in dwarf2/read.h
The buildbot pointed out this compilation failure on AlmaLinux, with g++
8.5.0, which is not seen on more recent systems:
CXX gdbtypes.o
In file included from ../../binutils-gdb/gdb/gdbtypes.c:39:
../../binutils-gdb/gdb/dwarf2/read.h:639:8: error: ‘mutex’ in namespace ‘std’ does not name a type
std::mutex dwo_files_lock;
^~~~~
../../binutils-gdb/gdb/dwarf2/read.h:639:3: note: ‘std::mutex’ is defined in header ‘<mutex>’; did you forget to ‘#include <mutex>’?
../../binutils-gdb/gdb/dwarf2/read.h:35:1:
+#include <mutex>
../../binutils-gdb/gdb/dwarf2/read.h:639:3:
std::mutex dwo_files_lock;
^~~
Fix it by including <mutex> in dwarf2/read.h.
Change-Id: Iba334a3dad217c86841a5e804d0f386876f5ff2f
diff --git a/gdb/dwarf2/read.h b/gdb/dwarf2/read.h
index e676d64..b8c3a96 100644
--- a/gdb/dwarf2/read.h
+++ b/gdb/dwarf2/read.h
@@ -20,6 +20,7 @@
#ifndef GDB_DWARF2_READ_H
#define GDB_DWARF2_READ_H
+#include <mutex>
#include <queue>
#include "dwarf2/abbrev.h"
#include "dwarf2/unit-head.h"
