Mercurial > hg > octave-lojdl > gnulib-hg
annotate m4/gettimeofday.m4 @ 5868:d094f71e51d4
(AC_FUNC_GETTIMEOFDAY_CLOBBER): Don't define
GETTIMEOFDAY_CLOBBERS_LOCALTIME_BUFFER, since nobody uses it.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Wed, 18 May 2005 19:47:30 +0000 |
| parents | 87c42e194f4a |
| children | 99d5ec1dbe15 |
| rev | line source |
|---|---|
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5868
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(AC_FUNC_GETTIMEOFDAY_CLOBBER): Don't define
Paul Eggert <eggert@cs.ucla.edu>
parents:
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1 #serial 7 |
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Use an all-permissive copyright notice, recommended by RMS.
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2 |
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5868
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(AC_FUNC_GETTIMEOFDAY_CLOBBER): Don't define
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3 # Copyright (C) 2001, 2002, 2003, 2005 Free Software Foundation, Inc. |
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4 # This file is free software; the Free Software Foundation |
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5 # gives unlimited permission to copy and/or distribute it, |
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6 # with or without modifications, as long as this notice is preserved. |
| 3295 | 7 |
| 8 dnl From Jim Meyering. | |
| 9 dnl | |
| 10 dnl See if gettimeofday clobbers the static buffer that localtime uses | |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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11 dnl for its return value. The gettimeofday function from Mac OS X 10.0.4 |
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87c42e194f4a
Use an all-permissive copyright notice, recommended by RMS.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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12 dnl (i.e., Darwin 1.3.7) has this problem. |
| 3295 | 13 dnl |
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14 dnl If it does, then arrange to use gettimeofday and localtime only via |
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parents:
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15 dnl the wrapper functions that work around the problem. |
| 3295 | 16 |
| 3332 | 17 AC_DEFUN([AC_FUNC_GETTIMEOFDAY_CLOBBER], |
| 3295 | 18 [ |
| 19 AC_REQUIRE([AC_HEADER_TIME]) | |
| 20 AC_CACHE_CHECK([whether gettimeofday clobbers localtime buffer], | |
| 21 jm_cv_func_gettimeofday_clobber, | |
| 22 [AC_TRY_RUN([ | |
| 23 #include <stdio.h> | |
| 4694 | 24 #include <string.h> |
| 3295 | 25 |
| 26 #if TIME_WITH_SYS_TIME | |
| 27 # include <sys/time.h> | |
| 28 # include <time.h> | |
| 29 #else | |
| 30 # if HAVE_SYS_TIME_H | |
| 31 # include <sys/time.h> | |
| 32 # else | |
| 33 # include <time.h> | |
| 34 # endif | |
| 35 #endif | |
| 36 | |
| 4694 | 37 #include <stdlib.h> |
| 3295 | 38 |
| 39 int | |
| 40 main () | |
| 41 { | |
| 42 time_t t = 0; | |
| 43 struct tm *lt; | |
| 44 struct tm saved_lt; | |
| 45 struct timeval tv; | |
| 46 lt = localtime (&t); | |
| 47 saved_lt = *lt; | |
| 48 gettimeofday (&tv, NULL); | |
| 49 if (memcmp (lt, &saved_lt, sizeof (struct tm)) != 0) | |
| 50 exit (1); | |
| 51 | |
| 52 exit (0); | |
| 53 } | |
| 54 ], | |
| 3332 | 55 jm_cv_func_gettimeofday_clobber=no, |
| 3295 | 56 jm_cv_func_gettimeofday_clobber=yes, |
| 57 dnl When crosscompiling, assume it is broken. | |
| 58 jm_cv_func_gettimeofday_clobber=yes) | |
| 59 ]) | |
| 60 if test $jm_cv_func_gettimeofday_clobber = yes; then | |
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61 gl_GETTIMEOFDAY_REPLACE_LOCALTIME |
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parents:
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62 |
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63 AC_DEFINE(gettimeofday, rpl_gettimeofday, |
| 3295 | 64 [Define to rpl_gettimeofday if the replacement function should be used.]) |
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65 gl_PREREQ_GETTIMEOFDAY |
| 3295 | 66 fi |
| 67 ]) | |
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68 |
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parents:
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69 AC_DEFUN([gl_GETTIMEOFDAY_REPLACE_LOCALTIME], [ |
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parents:
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70 AC_LIBOBJ(gettimeofday) |
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parents:
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71 AC_DEFINE(gmtime, rpl_gmtime, |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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72 [Define to rpl_gmtime if the replacement function should be used.]) |
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parents:
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73 AC_DEFINE(localtime, rpl_localtime, |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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74 [Define to rpl_localtime if the replacement function should be used.]) |
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fa39e8b4a0c2
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Paul Eggert <eggert@cs.ucla.edu>
parents:
4108
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75 ]) |
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parents:
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76 |
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parents:
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77 # Prerequisites of lib/gettimeofday.c. |
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An independent .m4 file for each module.
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parents:
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78 AC_DEFUN([gl_PREREQ_GETTIMEOFDAY], [ |
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c1d472db5c30
An independent .m4 file for each module.
Bruno Haible <bruno@clisp.org>
parents:
3856
diff
changeset
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79 AC_REQUIRE([AC_HEADER_TIME]) |
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An independent .m4 file for each module.
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parents:
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80 ]) |