Doxygen: Fix warnings about undocumented compounds

[platform/upstream/libusb.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index ef6927d..041eab8 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -202,7 +202,11 @@ if test "x$platform" = xposix; then
        AC_CHECK_FUNCS([clock_gettime], [have_clock_gettime=yes], [have_clock_gettime=])
        if test "x$have_clock_gettime" = xyes; then
                AC_CHECK_DECL([CLOCK_MONOTONIC], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_MONOTONIC])], [[#include <time.h>]])
-               AC_CHECK_DECL([CLOCK_REALTIME], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_REALTIME])], [[#include <time.h>]])
+               dnl use the monotonic clock for condition variable timed waits if possible
+               AC_CHECK_FUNCS([pthread_condattr_setclock], [need_clock_realtime=], [need_clock_realtime=yes])
+               if test "x$need_clock_realtime" = xyes; then
+                       AC_CHECK_DECL([CLOCK_REALTIME], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_REALTIME])], [[#include <time.h>]])
+               fi
        elif test "x$backend" != xdarwin; then
                AC_MSG_ERROR([clock_gettime() is required on this platform])
        fi