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1 office 1 # errno_h.m4 serial 10
2 dnl Copyright (C) 2004, 2006, 2008-2011 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
6  
7 AC_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
14 booboo
15 #endif
16 #if !defined EIDRM
17 booboo
18 #endif
19 #if !defined ENOLINK
20 booboo
21 #endif
22 #if !defined EPROTO
23 booboo
24 #endif
25 #if !defined EMULTIHOP
26 booboo
27 #endif
28 #if !defined EBADMSG
29 booboo
30 #endif
31 #if !defined EOVERFLOW
32 booboo
33 #endif
34 #if !defined ENOTSUP
35 booboo
36 #endif
37 #if !defined ENETRESET
38 booboo
39 #endif
40 #if !defined ECONNABORTED
41 booboo
42 #endif
43 #if !defined ESTALE
44 booboo
45 #endif
46 #if !defined EDQUOT
47 booboo
48 #endif
49 #if !defined ECANCELED
50 booboo
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 $1 = EOVERFLOW.
70 # The EOVERFLOW errno value ought to be defined in <errno.h>, according to
71 # POSIX. But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
72 # some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
73 # Check for the value of EOVERFLOW.
74 # Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
75 AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
76 [
77 if test -n "$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[
82 yes
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[
92 yes
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  
121 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
122 dnl Remove this when we can assume autoconf >= 2.61.
123 m4_ifdef([AC_COMPUTE_INT], [], [
124 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
125 ])