1# errno_h.m4 serial 10 2dnl Copyright (C) 2004, 2006, 2008-2011 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN_ONCE([gl_HEADER_ERRNO_H], 8[ 9 AC_REQUIRE([AC_PROG_CC]) 10 AC_CACHE_CHECK([for complete errno.h], [gl_cv_header_errno_h_complete], [ 11 AC_EGREP_CPP([booboo],[ 12#include <errno.h> 13#if !defined ENOMSG 14booboo 15#endif 16#if !defined EIDRM 17booboo 18#endif 19#if !defined ENOLINK 20booboo 21#endif 22#if !defined EPROTO 23booboo 24#endif 25#if !defined EMULTIHOP 26booboo 27#endif 28#if !defined EBADMSG 29booboo 30#endif 31#if !defined EOVERFLOW 32booboo 33#endif 34#if !defined ENOTSUP 35booboo 36#endif 37#if !defined ENETRESET 38booboo 39#endif 40#if !defined ECONNABORTED 41booboo 42#endif 43#if !defined ESTALE 44booboo 45#endif 46#if !defined EDQUOT 47booboo 48#endif 49#if !defined ECANCELED 50booboo 51#endif 52 ], 53 [gl_cv_header_errno_h_complete=no], 54 [gl_cv_header_errno_h_complete=yes]) 55 ]) 56 if test $gl_cv_header_errno_h_complete = yes; then 57 ERRNO_H='' 58 else 59 gl_NEXT_HEADERS([errno.h]) 60 ERRNO_H='errno.h' 61 fi 62 AC_SUBST([ERRNO_H]) 63 AM_CONDITIONAL([GL_GENERATE_ERRNO_H], [test -n "$ERRNO_H"]) 64 gl_REPLACE_ERRNO_VALUE([EMULTIHOP]) 65 gl_REPLACE_ERRNO_VALUE([ENOLINK]) 66 gl_REPLACE_ERRNO_VALUE([EOVERFLOW]) 67]) 68 69# Assuming $1 = EOVERFLOW. 70# The EOVERFLOW errno value ought to be defined in <errno.h>, according to 71# POSIX. But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and 72# some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined. 73# Check for the value of EOVERFLOW. 74# Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE. 75AC_DEFUN([gl_REPLACE_ERRNO_VALUE], 76[ 77 if test -n "$ERRNO_H"; then 78 AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [ 79 AC_EGREP_CPP([yes],[ 80#include <errno.h> 81#ifdef ]$1[ 82yes 83#endif 84 ], 85 [gl_cv_header_errno_h_]$1[=yes], 86 [gl_cv_header_errno_h_]$1[=no]) 87 if test $gl_cv_header_errno_h_]$1[ = no; then 88 AC_EGREP_CPP([yes],[ 89#define _XOPEN_SOURCE_EXTENDED 1 90#include <errno.h> 91#ifdef ]$1[ 92yes 93#endif 94 ], [gl_cv_header_errno_h_]$1[=hidden]) 95 if test $gl_cv_header_errno_h_]$1[ = hidden; then 96 dnl The macro exists but is hidden. 97 dnl Define it to the same value. 98 AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [ 99#define _XOPEN_SOURCE_EXTENDED 1 100#include <errno.h> 101/* The following two lines are a workaround against an autoconf-2.52 bug. */ 102#include <stdio.h> 103#include <stdlib.h> 104]) 105 fi 106 fi 107 ]) 108 case $gl_cv_header_errno_h_]$1[ in 109 yes | no) 110 ]$1[_HIDDEN=0; ]$1[_VALUE= 111 ;; 112 *) 113 ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1[" 114 ;; 115 esac 116 AC_SUBST($1[_HIDDEN]) 117 AC_SUBST($1[_VALUE]) 118 fi 119]) 120 121dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in. 122dnl Remove this when we can assume autoconf >= 2.61. 123m4_ifdef([AC_COMPUTE_INT], [], [ 124 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])]) 125]) 126