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-rw-r--r--configure.ac6
1 files changed, 6 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index c0bb8a3..7130152 100644
--- a/configure.ac
+++ b/configure.ac
@@ -497,6 +497,12 @@ AC_CHECK_FUNCS(endutxent getutxent getutxid getutxline pututxline )
AC_CHECK_FUNCS(setutxent utmpxname)
AC_CHECK_FUNCS(logout updwtmp logwtmp)
+# POSIX monotonic time
+OLDCFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=199309L"
+AC_CHECK_FUNCS(clock_gettime)
+CFLAGS="$OLDCFLAGS"
+
# OS X monotonic time
AC_CHECK_HEADERS([mach/mach_time.h])
AC_CHECK_FUNCS(mach_absolute_time)