1 files changed, 23 insertions, 0 deletions
diff --git a/m4/uptime.m4 b/m4/uptime.m4
new file mode 100644
index 0000000..4ae2900
--- /dev/null
+++ b/m4/uptime.m4
@@ -0,0 +1,23 @@
+# serial 8
+
+# Copyright (C) 1996, 1999-2001, 2004, 2009-2018 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.13])
+
+AC_DEFUN([gl_SYS_PROC_UPTIME],
+[ dnl Require AC_PROG_CC to see if we're cross compiling.
+  AC_REQUIRE([AC_PROG_CC])
+  AC_CACHE_CHECK([for /proc/uptime], [gl_cv_have_proc_uptime],
+  [gl_cv_have_proc_uptime=no
+    test -f /proc/uptime \
+      && test "$cross_compiling" = no \
+      && cat < /proc/uptime >/dev/null 2>/dev/null \
+      && gl_cv_have_proc_uptime=yes])
+  if test $gl_cv_have_proc_uptime = yes; then
+    AC_DEFINE([HAVE_PROC_UPTIME], [1],
+              [  Define if your system has the /proc/uptime special file.])
+  fi
+])