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Add missing `m4/clock_time.m4'.

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Ludovic Courtès 2012-07-07 00:20:20 +02:00
parent 235c280489
commit 407d13dddc
1 changed files with 38 additions and 0 deletions
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m4/clock_time.m4 Normal file
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# clock_time.m4 serial 10
dnl Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Check for clock_gettime and clock_settime, and set LIB_CLOCK_GETTIME.
# For a program named, say foo, you should add a line like the following
# in the corresponding Makefile.am file:
# foo_LDADD = $(LDADD) $(LIB_CLOCK_GETTIME)
AC_DEFUN([gl_CLOCK_TIME],
[
dnl Persuade glibc and Solaris <time.h> to declare these functions.
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
# Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
# Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
# Save and restore LIBS so e.g., -lrt, isn't added to it. Otherwise, *all*
# programs in the package would end up linked with that potentially-shared
# library, inducing unnecessary run-time overhead.
LIB_CLOCK_GETTIME=
AC_SUBST([LIB_CLOCK_GETTIME])
gl_saved_libs=$LIBS
AC_SEARCH_LIBS([clock_gettime], [rt posix4],
[if test "$ac_cv_search_clock_gettime" = "none required"; then
AC_SEARCH_LIBS([clock_getcpuclockid], [rt posix4],
[test "$ac_cv_search_clock_getcpuclockid" = "none required" \
|| LIB_CLOCK_GETTIME=$ac_cv_search_clock_getcpuclockid],
[test "$ac_cv_search_clock_gettime" = "none required" \
|| LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime])
else
LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime
fi])
AC_CHECK_FUNCS([clock_gettime clock_settime clock_getcpuclockid])
LIBS=$gl_saved_libs
])