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dnl @synopsis ACX_WHICH_GETHOSTBYNAME_R dnl dnl Provides a test to determine the correct way to call gethostbyname_r dnl dnl defines HAVE_GETHOSTBYNAME_R to the number of arguments required dnl dnl e.g. 6 arguments (linux) dnl e.g. 5 arguments (solaris) dnl e.g. 3 arguments (osf/1) dnl dnl @author Brian Stafford <brian@stafford.uklinux.net> dnl dnl based on version by Caolan McNamara <caolan@skynet.ie> dnl based on David Arnold's autoconf suggestion in the threads faq dnl AC_DEFUN([ACX_WHICH_GETHOSTBYNAME_R], [AC_CACHE_CHECK(number of arguments to gethostbyname_r, acx_which_gethostbyname_r, [ AC_TRY_COMPILE([ # include <netdb.h> ], [ char *name; struct hostent *he; struct hostent_data data; (void) gethostbyname_r(name, he, &data); ],acx_which_gethostbyname_r=3, [ dnl acx_which_gethostbyname_r=0 AC_TRY_COMPILE([ # include <netdb.h> ], [ char *name; struct hostent *he, *res; char *buffer = NULL; int buflen = 2048; int h_errnop; (void) gethostbyname_r(name, he, buffer, buflen, &res, &h_errnop) ],acx_which_gethostbyname_r=6, [ dnl acx_which_gethostbyname_r=0 AC_TRY_COMPILE([ # include <netdb.h> ], [ char *name; struct hostent *he; char *buffer = NULL; int buflen = 2048; int h_errnop; (void) gethostbyname_r(name, he, buffer, buflen, &h_errnop) ],acx_which_gethostbyname_r=5,acx_which_gethostbyname_r=0) ] ) ] ) ]) if test $acx_which_gethostbyname_r -gt 0 ; then AC_DEFINE_UNQUOTED([HAVE_GETHOSTBYNAME_R], $acx_which_gethostbyname_r, [Number of parameters to gethostbyname_r or 0 if not available]) fi ]) dnl @synopsis ACX_HELP_STRING(OPTION,DESCRIPTION) AC_DEFUN([ACX_HELP_STRING], [ $1 builtin([substr],[ ],len($1))[$2]]) dnl @synopsis ACX_FEATURE(ENABLE_OR_WITH,NAME[,VALUE]) AC_DEFUN([ACX_FEATURE], [echo "builtin([substr],[ ],len(--$1-$2))--$1-$2: ifelse($3,,[$]translit($1-$2,-,_),$3)"])