https://github.com/ceph/ceph/pull/73442

From e21836a46dc8d615fe63abbe4eda30915878d1fe Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Sun, 1 Nov 2026 18:29:30 +0800
Subject: [PATCH 1/5] cmake: define _LARGEFILE64_SOURCE

Define _LARGEFILE64_SOURCE to expose LFS64 interfaces such as
lseek64() and off64_t.

musl only provides these compatibility definitions when
_LARGEFILE64_SOURCE is defined. Defining _GNU_SOURCE alone is
not sufficient.

This fixes build failures on musl without adding libc-specific
compatibility definitions.

This was previously handled by Autotools but appears to have
been lost during the migration to CMake.

See also: https://github.com/ceph/ceph/pull/8402

Signed-off-by: Z. Liu <zhixu.liu@gmail.com>

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 46226c6bbe8..86c19833e8c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -94,6 +94,7 @@ add_definitions(
 
 if(LINUX)
   add_definitions("-D_GNU_SOURCE")
+  add_definitions("-D_LARGEFILE64_SOURCE")
 endif()
 
 add_compile_options(
-- 
2.49.1


From d5e95af7a83682e70a42550c73988ca86cb67fa4 Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Sun, 1 Nov 2026 18:50:34 +0800
Subject: [PATCH 2/5] pretty_binary: include cstdint for int32_t

pretty_binary.cc uses int32_t without explicitly including its
defining header. This happened to work due to transitive includes
on some standard library implementations, but fails on musl.

Include <cstdint> explicitly to avoid relying on transitive
header dependencies.

Signed-off-by: Z. Liu <zhixu.liu@gmail.com>

diff --git a/src/common/pretty_binary.cc b/src/common/pretty_binary.cc
index 62f68b3efa4..b2ee0a30369 100644
--- a/src/common/pretty_binary.cc
+++ b/src/common/pretty_binary.cc
@@ -2,6 +2,7 @@
 // vim: ts=8 sw=2 sts=2 expandtab
 
 #include "pretty_binary.h"
+#include <cstdint>
 #include <stdexcept>
 #include <sstream>
 
-- 
2.49.1


From 8c001ce00dced554ebdc244eb0be03c71403bad3 Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Sun, 1 Nov 2026 19:06:38 +0800
Subject: [PATCH 3/5] common: define missing TCP option constants

musl's <netinet/tcp.h> does not define TCPI_OPT_ECN_SEEN or
TCPI_OPT_SYN_DATA. These constants are defined in <linux/tcp.h>,
which conflicts with <netinet/tcp.h>. Define them locally to avoid
including the conflicting Linux UAPI header.

Signed-off-by: Z. Liu <zhixu.liu@gmail.com>

diff --git a/src/common/tcp_info.cc b/src/common/tcp_info.cc
index 85a34877457..69cccbefadf 100644
--- a/src/common/tcp_info.cc
+++ b/src/common/tcp_info.cc
@@ -15,6 +15,15 @@
 
 #include "common/tcp_info.h"
 
+// musl's <netinet/tcp.h> lacks these Linux TCP ABI constants.
+// Avoid including <linux/tcp.h>, which conflicts with <netinet/tcp.h>.
+#ifndef TCPI_OPT_ECN_SEEN
+# define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */
+#endif
+#ifndef TCPI_OPT_SYN_DATA
+# define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */
+#endif
+
 #include "common/Formatter.h"
 
 namespace ceph {
-- 
2.49.1


From 5723d95eae147d87082ea0a043155be46b49d556 Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Sun, 1 Nov 2026 10:14:38 +0800
Subject: [PATCH 4/5] client: include cstdint for int64_t

Trace.h uses int64_t without explicitly including its
defining header. This happened to work due to transitive includes
on some standard library implementations, but fails on musl.

Include <cstdint> explicitly to avoid relying on transitive
header dependencies.

Signed-off-by: Z. Liu <zhixu.liu@gmail.com>

diff --git a/src/client/Trace.h b/src/client/Trace.h
index e3f5eca9617..f9d9d89b82b 100644
--- a/src/client/Trace.h
+++ b/src/client/Trace.h
@@ -19,6 +19,7 @@
 
 #include <stdlib.h>
 
+#include <cstdint>
 #include <list>
 #include <string>
 #include <fstream>
-- 
2.49.1


From c950be991ef8582550111c427b94d4e6cd47e959 Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Sun, 1 Nov 2026 10:40:37 +0800
Subject: [PATCH 5/5] libcephfs_proxy: include <limits.h> explicitly for
 PATH_MAX

PATH_MAX is defined in <limits.h>. Although glibc exposes it
indirectly through <stdio.h>, musl requires <limits.h> to be
included explicitly.

Signed-off-by: Z. Liu <zhixu.liu@gmail.com>

diff --git a/src/libcephfs_proxy/proxy_mount.c b/src/libcephfs_proxy/proxy_mount.c
index aedaa5bc907..e9baa3e5e3c 100644
--- a/src/libcephfs_proxy/proxy_mount.c
+++ b/src/libcephfs_proxy/proxy_mount.c
@@ -2,6 +2,7 @@
 #include "proxy_mount.h"
 #include "proxy_helpers.h"
 
+#include <limits.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <sys/stat.h>
-- 
2.49.1