# clock_time.m4 serial 4 dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. dnl This file is free software, distributed under the terms of the GNU dnl General Public License. As a special exception to the GNU General dnl Public License, this file may be distributed as part of a program dnl that contains a configuration script generated by Autoconf, under dnl the same distribution terms as the rest of that program. # Check for clock_gettime and clock_settime, and sets LIB_CLOCK_GETTIME. AC_DEFUN([gl_CLOCK_TIME], [ # dnl Persuade glibc <time.h> to declare these functions. AC_REQUIRE([AC_GNU_SOURCE]) # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function. # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4. # Save and restore LIBS so e.g., -lrt, isn't added to it. Otherwise, *all* # programs in the package would end up linked with that potentially-shared # library, inducing unnecessary run-time overhead. fetish_saved_libs=$LIBS AC_SEARCH_LIBS(clock_gettime, [rt posix4], [test "$ac_cv_search_clock_gettime" = "none required" || LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime]) AC_SUBST(LIB_CLOCK_GETTIME) AC_CHECK_FUNCS(clock_gettime clock_settime) LIBS=$fetish_saved_libs ])