| 1 | # clock_time.m4 serial 8
|
|---|
| 2 | dnl Copyright (C) 2002-2006 Free Software Foundation, Inc.
|
|---|
| 3 | dnl This file is free software; the Free Software Foundation
|
|---|
| 4 | dnl gives unlimited permission to copy and/or distribute it,
|
|---|
| 5 | dnl with or without modifications, as long as this notice is preserved.
|
|---|
| 6 |
|
|---|
| 7 | # Check for clock_gettime and clock_settime, and set LIB_CLOCK_GETTIME.
|
|---|
| 8 | # For a program named, say foo, you should add a line like the following
|
|---|
| 9 | # in the corresponding Makefile.am file:
|
|---|
| 10 | # foo_LDADD = $(LDADD) $(LIB_CLOCK_GETTIME)
|
|---|
| 11 |
|
|---|
| 12 | AC_DEFUN([gl_CLOCK_TIME],
|
|---|
| 13 | [
|
|---|
| 14 | dnl Persuade glibc and Solaris <time.h> to declare these functions.
|
|---|
| 15 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|---|
| 16 |
|
|---|
| 17 | # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
|
|---|
| 18 | # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
|
|---|
| 19 |
|
|---|
| 20 | # Save and restore LIBS so e.g., -lrt, isn't added to it. Otherwise, *all*
|
|---|
| 21 | # programs in the package would end up linked with that potentially-shared
|
|---|
| 22 | # library, inducing unnecessary run-time overhead.
|
|---|
| 23 | gl_saved_libs=$LIBS
|
|---|
| 24 | AC_SEARCH_LIBS(clock_gettime, [rt posix4],
|
|---|
| 25 | [test "$ac_cv_search_clock_gettime" = "none required" ||
|
|---|
| 26 | LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime])
|
|---|
| 27 | AC_SUBST([LIB_CLOCK_GETTIME])
|
|---|
| 28 | AC_CHECK_FUNCS(clock_gettime clock_settime)
|
|---|
| 29 | LIBS=$gl_saved_libs
|
|---|
| 30 | ])
|
|---|
