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Annotation of embedaddon/libiconv/srcm4/errno_h.m4, revision 1.1

1.1     ! misho       1: # errno_h.m4 serial 6
        !             2: dnl Copyright (C) 2004, 2006, 2008, 2009 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 ESTALE
        !            38: booboo
        !            39: #endif
        !            40: #if !defined ECANCELED
        !            41: booboo
        !            42: #endif
        !            43:       ],
        !            44:       [gl_cv_header_errno_h_complete=no],
        !            45:       [gl_cv_header_errno_h_complete=yes])
        !            46:   ])
        !            47:   if test $gl_cv_header_errno_h_complete = yes; then
        !            48:     ERRNO_H=''
        !            49:   else
        !            50:     gl_CHECK_NEXT_HEADERS([errno.h])
        !            51:     ERRNO_H='errno.h'
        !            52:   fi
        !            53:   AC_SUBST([ERRNO_H])
        !            54:   gl_REPLACE_ERRNO_VALUE([EMULTIHOP])
        !            55:   gl_REPLACE_ERRNO_VALUE([ENOLINK])
        !            56:   gl_REPLACE_ERRNO_VALUE([EOVERFLOW])
        !            57: ])
        !            58: 
        !            59: # Assuming $1 = EOVERFLOW.
        !            60: # The EOVERFLOW errno value ought to be defined in <errno.h>, according to
        !            61: # POSIX.  But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
        !            62: # some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
        !            63: # Check for the value of EOVERFLOW.
        !            64: # Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
        !            65: AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
        !            66: [
        !            67:   if test -n "$ERRNO_H"; then
        !            68:     AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [
        !            69:       AC_EGREP_CPP([yes],[
        !            70: #include <errno.h>
        !            71: #ifdef ]$1[
        !            72: yes
        !            73: #endif
        !            74:       ],
        !            75:       [gl_cv_header_errno_h_]$1[=yes],
        !            76:       [gl_cv_header_errno_h_]$1[=no])
        !            77:       if test $gl_cv_header_errno_h_]$1[ = no; then
        !            78:         AC_EGREP_CPP([yes],[
        !            79: #define _XOPEN_SOURCE_EXTENDED 1
        !            80: #include <errno.h>
        !            81: #ifdef ]$1[
        !            82: yes
        !            83: #endif
        !            84:           ], [gl_cv_header_errno_h_]$1[=hidden])
        !            85:         if test $gl_cv_header_errno_h_]$1[ = hidden; then
        !            86:           dnl The macro exists but is hidden.
        !            87:           dnl Define it to the same value.
        !            88:           AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [
        !            89: #define _XOPEN_SOURCE_EXTENDED 1
        !            90: #include <errno.h>
        !            91: /* The following two lines are a workaround against an autoconf-2.52 bug.  */
        !            92: #include <stdio.h>
        !            93: #include <stdlib.h>
        !            94: ])
        !            95:         fi
        !            96:       fi
        !            97:     ])
        !            98:     case $gl_cv_header_errno_h_]$1[ in
        !            99:       yes | no)
        !           100:         ]$1[_HIDDEN=0; ]$1[_VALUE=
        !           101:         ;;
        !           102:       *)
        !           103:         ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1["
        !           104:         ;;
        !           105:     esac
        !           106:     AC_SUBST($1[_HIDDEN])
        !           107:     AC_SUBST($1[_VALUE])
        !           108:   fi
        !           109: ])
        !           110: 
        !           111: dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
        !           112: dnl Remove this when we can assume autoconf >= 2.61.
        !           113: m4_ifdef([AC_COMPUTE_INT], [], [
        !           114:   AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
        !           115: ])