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From b9b6faf66ae67648626470cb4fc3f0850ac4d842 Mon Sep 17 00:00:00 2001
From: David Disseldorp <ddiss@suse.de>
Date: Tue, 1 Sep 2020 13:49:21 +0200
Subject: [PATCH] cmake: detect and use sigdescr_np() if available
sys_siglist is deprecated with glibc 2.32. A new thread-safe and
async-signal safe sigdescr_np() function is provided, so use it if
available.
Fixes: https://tracker.ceph.com/issues/47187
Signed-off-by: David Disseldorp <ddiss@suse.de>
---
cmake/modules/CephChecks.cmake | 1 +
src/global/signal_handler.h | 8 +++++---
src/include/config-h.in.cmake | 3 +++
3 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/cmake/modules/CephChecks.cmake b/cmake/modules/CephChecks.cmake
index 23687283a7c6..ca86dcbc73de 100644
--- a/cmake/modules/CephChecks.cmake
+++ b/cmake/modules/CephChecks.cmake
@@ -24,6 +24,7 @@ check_function_exists(strerror_r HAVE_Strerror_R)
check_function_exists(name_to_handle_at HAVE_NAME_TO_HANDLE_AT)
check_function_exists(pipe2 HAVE_PIPE2)
check_function_exists(accept4 HAVE_ACCEPT4)
+check_function_exists(sigdescr_np HAVE_SIGDESCR_NP)
include(CMakePushCheckState)
cmake_push_check_state(RESET)
diff --git a/src/global/signal_handler.h b/src/global/signal_handler.h
index 476724201aa9..c101b2e28733 100644
--- a/src/global/signal_handler.h
+++ b/src/global/signal_handler.h
@@ -20,10 +20,12 @@
typedef void (*signal_handler_t)(int);
-#ifndef HAVE_REENTRANT_STRSIGNAL
-# define sig_str(signum) sys_siglist[signum]
-#else
+#ifdef HAVE_SIGDESCR_NP
+# define sig_str(signum) sigdescr_np(signum)
+#elif HAVE_REENTRANT_STRSIGNAL
# define sig_str(signum) strsignal(signum)
+#else
+# define sig_str(signum) sys_siglist[signum]
#endif
void install_sighandler(int signum, signal_handler_t handler, int flags);
diff --git a/src/include/config-h.in.cmake b/src/include/config-h.in.cmake
index 1ea3703f620c..59bd4273511a 100644
--- a/src/include/config-h.in.cmake
+++ b/src/include/config-h.in.cmake
@@ -220,6 +220,9 @@
/* Define to 1 if you have sched.h. */
#cmakedefine HAVE_SCHED 1
+/* Define to 1 if you have sigdescr_np. */
+#cmakedefine HAVE_SIGDESCR_NP 1
+
/* Support SSE (Streaming SIMD Extensions) instructions */
#cmakedefine HAVE_SSE
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