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# socklen.m4 serial 1 |
# socklen.m4 serial 2 |
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dnl Copyright (C) 2005 Free Software Foundation, Inc. |
dnl Copyright (C) 2005 Free Software Foundation, Inc. |
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dnl This file is free software; the Free Software Foundation |
dnl This file is free software; the Free Software Foundation |
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dnl gives unlimited permission to copy and/or distribute it, |
dnl gives unlimited permission to copy and/or distribute it, |
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dnl with or without modifications, as long as this notice is preserved. |
dnl with or without modifications, as long as this notice is preserved. |
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dnl From Simon Josefsson. |
dnl From Albert Chin. |
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AC_DEFUN([gl_SOCKLEN_T], |
dnl Check for socklen_t: historically on BSD it is an int, and in |
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[ |
dnl POSIX 1g it is a type of its own, but some platforms use different |
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AC_CHECK_HEADERS_ONCE(sys/types.h sys/socket.h) |
dnl types for the argument to getsockopt, getpeername, etc. So we |
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AC_CHECK_TYPE([socklen_t],, [AC_DEFINE([socklen_t], [int], |
dnl have to test to find something that will work. |
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[Map `socklen_t' to `int' if it is missing.])], [ |
AC_DEFUN([gl_TYPE_SOCKLEN_T], |
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#ifdef HAVE_SYS_TYPES_H |
[AC_CHECK_TYPE([socklen_t], , |
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# include <sys/types.h> |
[AC_MSG_CHECKING([for socklen_t equivalent]) |
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#endif |
AC_CACHE_VAL([gl_cv_gl_cv_socklen_t_equiv], |
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#ifdef HAVE_SYS_SOCKET_H |
[# Systems have either "struct sockaddr *" or |
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# include <sys/socket.h> |
# "void *" as the second argument to getpeername |
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#endif) |
gl_cv_socklen_t_equiv= |
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]) |
for arg2 in "struct sockaddr" void; do |
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]) |
for t in int size_t "unsigned int" "long int" "unsigned long int"; do |
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AC_TRY_COMPILE( |
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[#include <sys/types.h> |
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#include <sys/socket.h> |
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int getpeername (int, $arg2 *, $t *);], |
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[$t len; |
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getpeername (0, 0, &len);], |
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[gl_cv_socklen_t_equiv="$t"]) |
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test "$gl_cv_socklen_t_equiv" != "" && break |
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done |
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test "$gl_cv_socklen_t_equiv" != "" && break |
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done |
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]) |
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if test "$gl_cv_socklen_t_equiv" = ""; then |
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AC_MSG_ERROR([Cannot find a type to use in place of socklen_t]) |
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fi |
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AC_MSG_RESULT([$gl_cv_socklen_t_equiv]) |
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AC_DEFINE_UNQUOTED([socklen_t], [$gl_cv_socklen_t_equiv], |
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[type to use in place of socklen_t if not defined])], |
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[#include <sys/types.h> |
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#include <sys/socket.h>])]) |