From c84e5e55e0e9e793849f721d30979242ed6a6ee3 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Sun, 1 Oct 2023 14:12:38 +0200
Subject: [PATCH] fix build on uclibc-ng

Fix the following build failure with uclibc-ng raised since version
1.6.18 and
https://github.com/memcached/memcached/commit/875371a75cbf1f92350de2d1fa0fae4a35ed572b:

/home/buildroot/autobuild/instance-2/output-1/host/lib/gcc/arc-buildroot-linux-uclibc/10.2.0/../../../../arc-buildroot-linux-uclibc/bin/ld: memcached-thread.o: in function `thread_setname':
thread.c:(.text+0xea2): undefined reference to `pthread_setname_np'

Fixes:
 - http://autobuild.buildroot.org/results/e856d381f5ec7d2727f21c8bd46dacb456984416

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Upstream: unsent yet (waiting feedback on first patch)
---
 configure.ac | 1 +
 extstore.c   | 2 +-
 thread.c     | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index d94f6fb..5ec5088 100644
--- a/configure.ac
+++ b/configure.ac
@@ -686,6 +686,7 @@ AC_CHECK_FUNCS(clock_gettime)
 AC_CHECK_FUNCS(preadv)
 AC_CHECK_FUNCS(pread)
 AC_CHECK_FUNCS(eventfd)
+AC_CHECK_FUNCS([pthread_setname_np],[AC_DEFINE(HAVE_PTHREAD_SETNAME_NP, 1, [Define to 1 if support pthread_setname_np])])
 AC_CHECK_FUNCS([accept4], [AC_DEFINE(HAVE_ACCEPT4, 1, [Define to 1 if support accept4])])
 AC_CHECK_FUNCS([getopt_long], [AC_DEFINE(HAVE_GETOPT_LONG, 1, [Define to 1 if support getopt_long])])
 
diff --git a/extstore.c b/extstore.c
index b079465..f6a6180 100644
--- a/extstore.c
+++ b/extstore.c
@@ -119,7 +119,7 @@ struct store_engine {
 #define THR_NAME_MAXLEN 16
 static void thread_setname(pthread_t thread, const char *name) {
 assert(strlen(name) < THR_NAME_MAXLEN);
-#if defined(__linux__)
+#if defined(__linux__) && defined(HAVE_PTHREAD_SETNAME_NP)
 pthread_setname_np(thread, name);
 #endif
 }
diff --git a/thread.c b/thread.c
index ee120fa..76651c2 100644
--- a/thread.c
+++ b/thread.c
@@ -635,7 +635,7 @@ static void thread_libevent_process(evutil_socket_t fd, short which, void *arg)
 #define THR_NAME_MAXLEN 16
 void thread_setname(pthread_t thread, const char *name) {
 assert(strlen(name) < THR_NAME_MAXLEN);
-#if defined(__linux__)
+#if defined(__linux__) && defined(HAVE_PTHREAD_SETNAME_NP)
 pthread_setname_np(thread, name);
 #endif
 }
-- 
2.40.1