1dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. 2dnl This file is free software; the Free Software Foundation 3dnl gives unlimited permission to copy and/or distribute it, 4dnl with or without modifications, as long as this notice is preserved. 5 6dnl From Albert Chin, Windows fixes from Simon Josefsson. 7 8dnl Check for socklen_t: historically on BSD it is an int, and in 9dnl POSIX 1g it is a type of its own, but some platforms use different 10dnl types for the argument to getsockopt, getpeername, etc. So we 11dnl have to test to find something that will work. 12 13dnl On mingw32, socklen_t is in ws2tcpip.h ('int'), so we try to find 14dnl it there first. That file is included by gnulib's socket_.h, which 15dnl all users of this module should include. Cygwin must not include 16dnl ws2tcpip.h. 17 18dnl Windows fixes removed for Berkeley DB. Functions renamed, basic check 19dnl remains the same though. 20dnl !!! 21dnl The original version had fixes for MinGW -- if you need those, go back 22dnl and look at the original code. 23 24AC_DEFUN([AM_SOCKLEN_T],[ 25 AC_CHECK_TYPE([socklen_t], , 26 [AC_MSG_CHECKING([for socklen_t equivalent]) 27 AC_CACHE_VAL([db_cv_socklen_t_equiv], 28 [# Systems have either "struct sockaddr *" or 29 # "void *" as the second argument to getpeername 30 db_cv_socklen_t_equiv= 31 for arg2 in "struct sockaddr" void; do 32 for t in int size_t "unsigned int" "long int" "unsigned long int"; do 33 AC_TRY_COMPILE([$db_includes 34#ifdef HAVE_SYS_SOCKET_H 35#include <sys/socket.h> 36#endif 37 int getpeername (int, $arg2 *, $t *);], 38 [$t len; 39 getpeername (0, 0, &len);], 40 [db_cv_socklen_t_equiv="$t"]) 41 test "$db_cv_socklen_t_equiv" != "" && break 42 done 43 test "$db_cv_socklen_t_equiv" != "" && break 44 done 45 ]) 46 if test "$db_cv_socklen_t_equiv" = ""; then 47 AC_MSG_ERROR([Cannot find a type to use in place of socklen_t]) 48 fi 49 AC_MSG_RESULT([$db_cv_socklen_t_equiv]) 50 AC_DEFINE_UNQUOTED([socklen_t], [$db_cv_socklen_t_equiv], 51 [type to use in place of socklen_t if not defined])], 52 [$db_includes 53#ifdef HAVE_SYS_SOCKET_H 54#include <sys/socket.h> 55#endif])]) 56