From 85928aff5eb9601520ca3e451728001fb25af0de Mon Sep 17 00:00:00 2001
From: Kefu Chai <tchaikov@gmail.com>
Date: Fri, 25 Nov 2022 16:52:29 +0800
Subject: [PATCH] *: include fmt/ostream.h if FMT_VERSION >= 9

before this change, we assume that `fmt/ostream.h` is included, and
reference `fmt::ostream_formatter`. this breaks the build if the tree
is compiled on {fmt} v9 and up.

after this change, `fmt/ostream.h` is conditionally included. as the
compiling unit is supposed to include fmt headers before including
headers in this project, we can tell if fmt/ostream.h is needed or not
by checking the FMT_VERSION macro.

Signed-off-by: Kefu Chai <tchaikov@gmail.com>
---
 src/common/ceph_time.h    | 3 +++
 src/crush/CrushLocation.h | 3 +++
 src/include/uuid.h        | 4 ++++
 src/msg/Message.h         | 3 +++
 src/osd/osd_types_fmt.h   | 3 +++
 5 files changed, 16 insertions(+)

diff --git a/src/common/ceph_time.h b/src/common/ceph_time.h
index 22429fa282a..2d3d1fda010 100644
--- a/src/common/ceph_time.h
+++ b/src/common/ceph_time.h
@@ -19,6 +19,9 @@
 #include <iostream>
 #include <string>
 #include <optional>
+#if FMT_VERSION >= 90000
+#include <fmt/ostream.h>
+#endif
 #include <sys/time.h>
 
 #if defined(__APPLE__)
diff --git a/src/crush/CrushLocation.h b/src/crush/CrushLocation.h
index 24f43068d61..2d2d4b52b96 100644
--- a/src/crush/CrushLocation.h
+++ b/src/crush/CrushLocation.h
@@ -7,6 +7,9 @@
 #include <iosfwd>
 #include <map>
 #include <string>
+#if FMT_VERSION >= 90000
+#include <fmt/ostream.h>
+#endif
 
 #include "common/ceph_mutex.h"
 #include "include/common_fwd.h"
diff --git a/src/include/uuid.h b/src/include/uuid.h
index 6a30aa621c4..f6ef9878dae 100644
--- a/src/include/uuid.h
+++ b/src/include/uuid.h
@@ -16,6 +16,10 @@
 #include <boost/uuid/uuid_generators.hpp>
 #include <boost/uuid/uuid_io.hpp>
 
+#if FMT_VERSION >= 90000
+#include <fmt/ostream.h>
+#endif
+
 namespace ceph {
   class Formatter;
 }
diff --git a/src/msg/Message.h b/src/msg/Message.h
index 3a18c82a280..6ebf06346c3 100644
--- a/src/msg/Message.h
+++ b/src/msg/Message.h
@@ -21,6 +21,9 @@
 #include <string_view>
 
 #include <boost/intrusive/list.hpp>
+#if FMT_VERSION >= 90000
+#include <fmt/ostream.h>
+#endif
 
 #include "include/Context.h"
 #include "common/RefCountedObj.h"
diff --git a/src/osd/osd_types_fmt.h b/src/osd/osd_types_fmt.h
index 2a43fe893ee..5756abcb092 100644
--- a/src/osd/osd_types_fmt.h
+++ b/src/osd/osd_types_fmt.h
@@ -8,6 +8,9 @@
 #include "common/hobject_fmt.h"
 #include "osd/osd_types.h"
 #include <fmt/chrono.h>
+#if FMT_VERSION >= 90000
+#include <fmt/ostream.h>
+#endif
 
 template <>
 struct fmt::formatter<osd_reqid_t> {
-- 
2.47.3