Remove clock_gettime check

Author: rescrv

Diff for: Makefile.am

@@ -303,7 +303,7 @@ hyperdex_daemon_LDADD += $(HYPERLEVELDB_LIBS)
 hyperdex_daemon_LDADD += $(BUSYBEE_LIBS)
 hyperdex_daemon_LDADD += $(E_LIBS)
 hyperdex_daemon_LDADD += $(PO6_LIBS)
-hyperdex_daemon_LDADD += $(POPT_LIBS) ${GLOG_LIBS} $(LRT_LDFLAGS) -lpthread
+hyperdex_daemon_LDADD += $(POPT_LIBS) ${GLOG_LIBS} -lpthread
 man/hyperdex-daemon.1: man/hyperdex-daemon.1.h2m daemon/main.cc | hyperdex-daemon$(EXEEXT)
 	$(help2man_verbose)help2man $(HELP2MAN_FLAGS) --section 1 --output $@ --include $< ${abs_top_builddir}/hyperdex-daemon$(EXEEXT)
 

Diff for: configure.ac

@@ -82,14 +82,6 @@ fi
 AC_SUBST([JNI_CPPFLAGS], [${JNI_CPPFLAGS}])
 
 # Checks for libraries.
-AC_CHECK_LIB([rt], [clock_gettime], [needs_lrt=yes], [needs_lrt=no])
-
-if test x"${needs_lrt}" = xyes; then
-    AC_SUBST([LRT_LDFLAGS], ["-lrt"])
-else
-    AC_SUBST([LRT_LDFLAGS], [""])
-fi
-
 if test x"${enable_all_components}" = xyes -o \
         x"${enable_tools}" = xyes -o \
         x"${enable_coordinator}" = xyes -o \
@@ -100,12 +92,6 @@ HyperDex relies upon the popt library.
 Please install popt to continue.
 -------------------------------------------------])])
 fi
-AC_CHECK_LIB([rt], [clock_gettime], [needs_lrt=yes], [needs_lrt=no])
-if test x"${needs_lrt}" = xyes; then
-    AC_SUBST([LRT_CFLAGS], ["-lrt"])
-else
-    AC_SUBST([LRT_CFLAGS], [""])
-fi
 
 if test x"${enable_all_components}" = xyes -o \
         x"${enable_client}" = xyes -o \
@@ -184,7 +170,7 @@ fi
 # Checks for library functions.
 AC_FUNC_ERROR_AT_LINE
 AC_FUNC_MMAP
-AC_CHECK_FUNCS([alarm clock_gettime mach_absolute_time ftruncate memmove mkdir munmap rmdir socket])
+AC_CHECK_FUNCS([alarm ftruncate memmove mkdir munmap rmdir socket])
 
 # Optional components
 AC_ARG_ENABLE([ycsb], [AS_HELP_STRING([--enable-ycsb],