| 1 | # errno_h.m4 serial 10
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| 2 | dnl Copyright (C) 2004, 2006, 2008-2012 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN_ONCE([gl_HEADER_ERRNO_H],
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| 8 | [
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| 9 | AC_REQUIRE([AC_PROG_CC])
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| 10 | AC_CACHE_CHECK([for complete errno.h], [gl_cv_header_errno_h_complete], [
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| 11 | AC_EGREP_CPP([booboo],[
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| 12 | #include <errno.h>
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| 13 | #if !defined ENOMSG
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| 14 | booboo
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| 15 | #endif
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| 16 | #if !defined EIDRM
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| 17 | booboo
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| 18 | #endif
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| 19 | #if !defined ENOLINK
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| 20 | booboo
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| 21 | #endif
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| 22 | #if !defined EPROTO
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| 23 | booboo
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| 24 | #endif
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| 25 | #if !defined EMULTIHOP
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| 26 | booboo
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| 27 | #endif
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| 28 | #if !defined EBADMSG
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| 29 | booboo
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| 30 | #endif
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| 31 | #if !defined EOVERFLOW
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| 32 | booboo
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| 33 | #endif
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| 34 | #if !defined ENOTSUP
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| 35 | booboo
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| 36 | #endif
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| 37 | #if !defined ENETRESET
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| 38 | booboo
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| 39 | #endif
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| 40 | #if !defined ECONNABORTED
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| 41 | booboo
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| 42 | #endif
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| 43 | #if !defined ESTALE
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| 44 | booboo
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| 45 | #endif
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| 46 | #if !defined EDQUOT
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| 47 | booboo
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| 48 | #endif
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| 49 | #if !defined ECANCELED
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| 50 | booboo
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| 51 | #endif
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| 52 | ],
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| 53 | [gl_cv_header_errno_h_complete=no],
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| 54 | [gl_cv_header_errno_h_complete=yes])
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| 55 | ])
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| 56 | if test $gl_cv_header_errno_h_complete = yes; then
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| 57 | ERRNO_H=''
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| 58 | else
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| 59 | gl_NEXT_HEADERS([errno.h])
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| 60 | ERRNO_H='errno.h'
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| 61 | fi
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| 62 | AC_SUBST([ERRNO_H])
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| 63 | AM_CONDITIONAL([GL_GENERATE_ERRNO_H], [test -n "$ERRNO_H"])
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| 64 | gl_REPLACE_ERRNO_VALUE([EMULTIHOP])
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| 65 | gl_REPLACE_ERRNO_VALUE([ENOLINK])
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| 66 | gl_REPLACE_ERRNO_VALUE([EOVERFLOW])
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| 67 | ])
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| 68 |
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| 69 | # Assuming $1 = EOVERFLOW.
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| 70 | # The EOVERFLOW errno value ought to be defined in <errno.h>, according to
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| 71 | # POSIX. But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
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| 72 | # some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
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| 73 | # Check for the value of EOVERFLOW.
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| 74 | # Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
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| 75 | AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
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| 76 | [
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| 77 | if test -n "$ERRNO_H"; then
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| 78 | AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [
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| 79 | AC_EGREP_CPP([yes],[
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| 80 | #include <errno.h>
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| 81 | #ifdef ]$1[
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| 82 | yes
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| 83 | #endif
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| 84 | ],
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| 85 | [gl_cv_header_errno_h_]$1[=yes],
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| 86 | [gl_cv_header_errno_h_]$1[=no])
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| 87 | if test $gl_cv_header_errno_h_]$1[ = no; then
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| 88 | AC_EGREP_CPP([yes],[
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| 89 | #define _XOPEN_SOURCE_EXTENDED 1
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| 90 | #include <errno.h>
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| 91 | #ifdef ]$1[
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| 92 | yes
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| 93 | #endif
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| 94 | ], [gl_cv_header_errno_h_]$1[=hidden])
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| 95 | if test $gl_cv_header_errno_h_]$1[ = hidden; then
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| 96 | dnl The macro exists but is hidden.
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| 97 | dnl Define it to the same value.
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| 98 | AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [
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| 99 | #define _XOPEN_SOURCE_EXTENDED 1
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| 100 | #include <errno.h>
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| 101 | /* The following two lines are a workaround against an autoconf-2.52 bug. */
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| 102 | #include <stdio.h>
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| 103 | #include <stdlib.h>
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| 104 | ])
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| 105 | fi
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| 106 | fi
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| 107 | ])
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| 108 | case $gl_cv_header_errno_h_]$1[ in
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| 109 | yes | no)
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| 110 | ]$1[_HIDDEN=0; ]$1[_VALUE=
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| 111 | ;;
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| 112 | *)
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| 113 | ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1["
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| 114 | ;;
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| 115 | esac
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| 116 | AC_SUBST($1[_HIDDEN])
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| 117 | AC_SUBST($1[_VALUE])
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| 118 | fi
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| 119 | ])
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| 120 |
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| 121 | dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
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| 122 | dnl Remove this when we can assume autoconf >= 2.61.
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| 123 | m4_ifdef([AC_COMPUTE_INT], [], [
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| 124 | AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
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| 125 | ])
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