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From d3be03464be7fa3844dfe0837a7e2c920c107836 Mon Sep 17 00:00:00 2001
From: Baruch Siach <baruch@tkos.co.il>
Date: Thu, 23 Jul 2015 13:35:35 +0300
Subject: [PATCH] configure.ac: detect -lrt requirement for clock_gettime

glibc versions before 2.17 require link with -lrt.

Upstream status: sent, stuck in moderator's queue

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
 configure.ac     | 8 ++++++++
 unix/Makefile.am | 4 ++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 18401f161d45..6b350a41a916 100644
--- a/configure.ac
+++ b/configure.ac
@@ -854,6 +854,14 @@ OPENIPMI_SWIG_SO="${PYTHON_POSIX_SO}:\$(top_builddir)/lib/.libs/libOpenIPMI.so:\
 AC_SUBST(OPENIPMI_SWIG_LIBS)
 AC_SUBST(OPENIPMI_SWIG_SO)
 
+LIB_CLOCK_GETTIME=
+clk_saved_libs=$LIBS
+AC_SEARCH_LIBS([clock_gettime], [rt],
+	       [test "$ac_cv_search_clock_gettime" = "none required" ||
+		LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime])
+AC_SUBST([LIB_CLOCK_GETTIME])
+LIBS=$clk_saved_libs
+
 # Everything from here to AC_OUTPUT is for libedit
 
 # AC_PROG_LIBTOOL runs AC_CANONICAL_HOST
diff --git a/unix/Makefile.am b/unix/Makefile.am
index a108bc679c9a..fb60242d5d3b 100644
--- a/unix/Makefile.am
+++ b/unix/Makefile.am
@@ -9,13 +9,13 @@ lib_LTLIBRARIES = libOpenIPMIposix.la libOpenIPMIpthread.la
 
 libOpenIPMIpthread_la_SOURCES = posix_thread_os_hnd.c selector.c
 libOpenIPMIpthread_la_LIBADD = -lpthread $(GDBM_LIB) \
-	$(top_builddir)/utils/libOpenIPMIutils.la
+	$(top_builddir)/utils/libOpenIPMIutils.la $(LIB_CLOCK_GETTIME)
 libOpenIPMIpthread_la_LDFLAGS = -rdynamic -version-info $(LD_VERSION) \
 	-Wl,-Map -Wl,libOpenIPMIpthread.map
 
 libOpenIPMIposix_la_SOURCES = posix_os_hnd.c selector.c
 libOpenIPMIposix_la_LIBADD = $(top_builddir)/utils/libOpenIPMIutils.la \
-	$(GDBM_LIB)
+	$(GDBM_LIB) $(LIB_CLOCK_GETTIME)
 libOpenIPMIposix_la_LDFLAGS = -rdynamic -version-info $(LD_VERSION) \
 	-Wl,-Map -Wl,libOpenIPMIposix.map
 
-- 
2.1.4

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