| | 1 | dnl @synopsis AX_FUNC_WHICH_GETHOSTBYNAME_R |
| | 2 | dnl |
| | 3 | dnl Determines which historical variant of the gethostbyname_r() call |
| | 4 | dnl (taking three, five, or six arguments) is available on the system |
| | 5 | dnl and defines one of the following macros accordingly: |
| | 6 | dnl |
| | 7 | dnl HAVE_FUNC_GETHOSTBYNAME_R_6 |
| | 8 | dnl HAVE_FUNC_GETHOSTBYNAME_R_5 |
| | 9 | dnl HAVE_FUNC_GETHOSTBYNAME_R_3 |
| | 10 | dnl |
| | 11 | dnl If used in conjunction with gethostname.c, the API demonstrated in |
| | 12 | dnl test.c can be used regardless of which gethostbyname_r() is |
| | 13 | dnl available. These example files can be found at |
| | 14 | dnl http://www.csn.ul.ie/~caolan/publink/gethostbyname_r |
| | 15 | dnl |
| | 16 | dnl based on David Arnold's autoconf suggestion in the threads faq |
| | 17 | dnl |
| | 18 | dnl Originally named "AC_caolan_FUNC_WHICH_GETHOSTBYNAME_R". Rewritten |
| | 19 | dnl for Autoconf 2.5x by Daniel Richard G. |
| | 20 | dnl |
| | 21 | dnl @category InstalledPackages |
| | 22 | dnl @author Caolan McNamara <caolan@skynet.ie> |
| | 23 | dnl @author Daniel Richard G. <skunk@iskunk.org> |
| | 24 | dnl @version 2005-01-21 |
| | 25 | dnl @license GPLWithACException |
| | 26 | |
| | 27 | AC_DEFUN([AX_FUNC_WHICH_GETHOSTBYNAME_R], [ |
| | 28 | |
| | 29 | AC_LANG_PUSH(C) |
| | 30 | AC_MSG_CHECKING([how many arguments gethostbyname_r() takes]) |
| | 31 | |
| | 32 | AC_CACHE_VAL(ac_cv_func_which_gethostbyname_r, [ |
| | 33 | |
| | 34 | ################################################################ |
| | 35 | |
| | 36 | ac_cv_func_which_gethostbyname_r=unknown |
| | 37 | |
| | 38 | # |
| | 39 | # ONE ARGUMENT (sanity check) |
| | 40 | # |
| | 41 | |
| | 42 | # This should fail, as there is no variant of gethostbyname_r() that takes |
| | 43 | # a single argument. If it actually compiles, then we can assume that |
| | 44 | # netdb.h is not declaring the function, and the compiler is thereby |
| | 45 | # assuming an implicit prototype. In which case, we're out of luck. |
| | 46 | # |
| | 47 | AC_COMPILE_IFELSE( |
| | 48 | AC_LANG_PROGRAM( |
| | 49 | [[#include <netdb.h>]], |
| | 50 | [[ |
| | 51 | char *name = "www.gnu.org"; |
| | 52 | (void)gethostbyname_r(name) /* ; */ |
| | 53 | ]]), |
| | 54 | ac_cv_func_which_gethostbyname_r=no) |
| | 55 | |
| | 56 | # |
| | 57 | # SIX ARGUMENTS |
| | 58 | # (e.g. Linux) |
| | 59 | # |
| | 60 | |
| | 61 | if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then |
| | 62 | |
| | 63 | AC_COMPILE_IFELSE( |
| | 64 | AC_LANG_PROGRAM( |
| | 65 | [[#include <netdb.h>]], |
| | 66 | [[ |
| | 67 | char *name = "www.gnu.org"; |
| | 68 | struct hostent ret, *retp; |
| | 69 | char buf@<:@1024@:>@; |
| | 70 | int buflen = 1024; |
| | 71 | int my_h_errno; |
| | 72 | (void)gethostbyname_r(name, &ret, buf, buflen, &retp, &my_h_errno) /* ; */ |
| | 73 | ]]), |
| | 74 | ac_cv_func_which_gethostbyname_r=six) |
| | 75 | |
| | 76 | fi |
| | 77 | |
| | 78 | # |
| | 79 | # FIVE ARGUMENTS |
| | 80 | # (e.g. Solaris) |
| | 81 | # |
| | 82 | |
| | 83 | if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then |
| | 84 | |
| | 85 | AC_COMPILE_IFELSE( |
| | 86 | AC_LANG_PROGRAM( |
| | 87 | [[#include <netdb.h>]], |
| | 88 | [[ |
| | 89 | char *name = "www.gnu.org"; |
| | 90 | struct hostent ret; |
| | 91 | char buf@<:@1024@:>@; |
| | 92 | int buflen = 1024; |
| | 93 | int my_h_errno; |
| | 94 | (void)gethostbyname_r(name, &ret, buf, buflen, &my_h_errno) /* ; */ |
| | 95 | ]]), |
| | 96 | ac_cv_func_which_gethostbyname_r=five) |
| | 97 | |
| | 98 | fi |
| | 99 | |
| | 100 | # |
| | 101 | # THREE ARGUMENTS |
| | 102 | # (e.g. AIX, HP-UX, Tru64) |
| | 103 | # |
| | 104 | |
| | 105 | if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then |
| | 106 | |
| | 107 | AC_COMPILE_IFELSE( |
| | 108 | AC_LANG_PROGRAM( |
| | 109 | [[#include <netdb.h>]], |
| | 110 | [[ |
| | 111 | char *name = "www.gnu.org"; |
| | 112 | struct hostent ret; |
| | 113 | struct hostent_data data; |
| | 114 | (void)gethostbyname_r(name, &ret, &data) /* ; */ |
| | 115 | ]]), |
| | 116 | ac_cv_func_which_gethostbyname_r=three) |
| | 117 | |
| | 118 | fi |
| | 119 | |
| | 120 | ################################################################ |
| | 121 | |
| | 122 | ]) dnl end AC_CACHE_VAL |
| | 123 | |
| | 124 | case "$ac_cv_func_which_gethostbyname_r" in |
| | 125 | three) |
| | 126 | AC_MSG_RESULT([three]) |
| | 127 | AC_DEFINE(HAVE_FUNC_GETHOSTBYNAME_R_3) |
| | 128 | ;; |
| | 129 | |
| | 130 | five) |
| | 131 | AC_MSG_RESULT([five]) |
| | 132 | AC_DEFINE(HAVE_FUNC_GETHOSTBYNAME_R_5) |
| | 133 | ;; |
| | 134 | |
| | 135 | six) |
| | 136 | AC_MSG_RESULT([six]) |
| | 137 | AC_DEFINE(HAVE_FUNC_GETHOSTBYNAME_R_6) |
| | 138 | ;; |
| | 139 | |
| | 140 | no) |
| | 141 | AC_MSG_RESULT([cannot find function declaration in netdb.h]) |
| | 142 | ;; |
| | 143 | |
| | 144 | unknown) |
| | 145 | AC_MSG_RESULT([can't tell]) |
| | 146 | ;; |
| | 147 | |
| | 148 | *) |
| | 149 | AC_MSG_ERROR([internal error]) |
| | 150 | ;; |
| | 151 | esac |
| | 152 | |
| | 153 | AC_LANG_POP(C) |
| | 154 | |
| | 155 | ]) dnl end AC_DEFUN |
projects / wxWidgets.git / blame_incremental