From: Michal Schmidt <mschmidt@redhat.com>
Date: Wed, 14 Nov 2012 13:44:05 +0000 (+0100)
Subject: configure.ac: fix FTBFS with new glibc
X-Git-Tag: v196~90
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=e17187091d463ad008c0b74eb04de5078b2abb96

configure.ac: fix FTBFS with new glibc

glibc moved clock_* functions from librt to the core libc. As a result,
clock_gettime is no more a suitable symbol to use when finding librt.
Look for mq_open instead.
Reference:
http://www.sourceware.org/git/gitweb.cgi?p=glibc.git&h=6e6249d0b461b952d0f544792372663feb6d792a

Fixes a FTBFS in Fedora Rawhide.
---

diff --git a/configure.ac b/configure.ac
index c4638d15a..71ea6ad25 100644
--- a/configure.ac
+++ b/configure.ac
@@ -171,7 +171,7 @@ CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [\
         -Wl,-z,now])
 AC_SUBST([OUR_LDFLAGS], $with_ldflags)
 
-AC_SEARCH_LIBS([clock_gettime], [rt], [], [AC_MSG_ERROR([*** POSIX RT library not found])])
+AC_SEARCH_LIBS([mq_open], [rt], [], [AC_MSG_ERROR([*** POSIX RT library not found])])
 AC_SEARCH_LIBS([dlsym], [dl], [], [AC_MSG_ERROR([*** Dynamic linking loader library not found])])
 
 save_LIBS="$LIBS"