AC_CACHE_CHECK([whether CLOCK_MONOTONIC or CLOCK_REALTIME is defined],
gl_cv_have_clock_gettime_macro,
[AC_EGREP_CPP([have_clock_gettime_macro],
AC_CACHE_CHECK([whether CLOCK_MONOTONIC or CLOCK_REALTIME is defined],
gl_cv_have_clock_gettime_macro,
[AC_EGREP_CPP([have_clock_gettime_macro],