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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 57d3bf2ca96d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # serial 21
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2
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3 dnl From Jim Meyering.
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4 dnl A wrapper around AC_FUNC_GETGROUPS.
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5
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6 # Copyright (C) 1996-1997, 1999-2004, 2008-2019 Free Software Foundation, Inc.
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7 #
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8 # This file is free software; the Free Software Foundation
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9 # gives unlimited permission to copy and/or distribute it,
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10 # with or without modifications, as long as this notice is preserved.
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11
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12 m4_version_prereq([2.70], [] ,[
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13
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14 # This is taken from the following Autoconf patch:
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15 # https://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9
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16 AC_DEFUN([AC_FUNC_GETGROUPS],
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17 [
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18 AC_REQUIRE([AC_TYPE_GETGROUPS])dnl
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19 AC_REQUIRE([AC_TYPE_SIZE_T])dnl
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20 AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles
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21 AC_CHECK_FUNC([getgroups])
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22
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23 # If we don't yet have getgroups, see if it's in -lbsd.
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24 # This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1.
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25 ac_save_LIBS=$LIBS
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26 if test $ac_cv_func_getgroups = no; then
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27 AC_CHECK_LIB(bsd, getgroups, [GETGROUPS_LIB=-lbsd])
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28 fi
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29
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30 # Run the program to test the functionality of the system-supplied
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31 # getgroups function only if there is such a function.
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32 if test $ac_cv_func_getgroups = yes; then
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33 AC_CACHE_CHECK([for working getgroups], [ac_cv_func_getgroups_works],
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34 [AC_RUN_IFELSE(
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35 [AC_LANG_PROGRAM(
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36 [AC_INCLUDES_DEFAULT],
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37 [[/* On NeXTstep 3.2, getgroups (0, 0) always fails. */
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38 return getgroups (0, 0) == -1;]])
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39 ],
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40 [ac_cv_func_getgroups_works=yes],
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41 [ac_cv_func_getgroups_works=no],
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42 [case "$host_os" in # ((
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43 # Guess yes on glibc systems.
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44 *-gnu* | gnu*) ac_cv_func_getgroups_works="guessing yes" ;;
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45 # If we don't know, assume the worst.
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46 *) ac_cv_func_getgroups_works="guessing no" ;;
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47 esac
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48 ])
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49 ])
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50 else
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51 ac_cv_func_getgroups_works=no
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52 fi
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53 case "$ac_cv_func_getgroups_works" in
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54 *yes)
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55 AC_DEFINE([HAVE_GETGROUPS], [1],
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56 [Define to 1 if your system has a working `getgroups' function.])
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57 ;;
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58 esac
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59 LIBS=$ac_save_LIBS
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60 ])# AC_FUNC_GETGROUPS
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61
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62 ])
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63
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64 AC_DEFUN([gl_FUNC_GETGROUPS],
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65 [
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66 AC_REQUIRE([AC_TYPE_GETGROUPS])
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67 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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68 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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69
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70 AC_FUNC_GETGROUPS
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71 if test $ac_cv_func_getgroups != yes; then
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72 HAVE_GETGROUPS=0
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73 else
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74 if test "$ac_cv_type_getgroups" != gid_t \
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75 || { case "$ac_cv_func_getgroups_works" in
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76 *yes) false;;
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77 *) true;;
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78 esac
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79 }; then
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80 REPLACE_GETGROUPS=1
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81 AC_DEFINE([GETGROUPS_ZERO_BUG], [1], [Define this to 1 if
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82 getgroups(0,NULL) does not return the number of groups.])
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83 else
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84 dnl Detect FreeBSD bug; POSIX requires getgroups(-1,ptr) to fail.
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85 AC_CACHE_CHECK([whether getgroups handles negative values],
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86 [gl_cv_func_getgroups_works],
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87 [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
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88 [[int size = getgroups (0, 0);
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89 gid_t *list = malloc (size * sizeof *list);
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90 int result = getgroups (-1, list) != -1;
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91 free (list);
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92 return result;]])],
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93 [gl_cv_func_getgroups_works=yes],
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94 [gl_cv_func_getgroups_works=no],
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95 [case "$host_os" in
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96 # Guess yes on glibc systems.
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97 *-gnu* | gnu*) gl_cv_func_getgroups_works="guessing yes" ;;
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98 # If we don't know, assume the worst.
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99 *) gl_cv_func_getgroups_works="guessing no" ;;
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100 esac
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101 ])])
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102 case "$gl_cv_func_getgroups_works" in
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103 *yes) ;;
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104 *) REPLACE_GETGROUPS=1 ;;
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105 esac
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106 fi
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107 fi
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108 test -n "$GETGROUPS_LIB" && LIBS="$GETGROUPS_LIB $LIBS"
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109 ])