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+.\" Copyright (c) 2010 Kai Wang
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $Id: dwarf_hasattr.3 3181 2015-04-10 13:22:51Z emaste $
+.\"
+.Dd April 17, 2010
+.Os
+.Dt DWARF_HASATTR 3
+.Sh NAME
+.Nm dwarf_hasattr
+.Nd check for the presence of an attribute
+.Sh LIBRARY
+.Lb libdwarf
+.Sh SYNOPSIS
+.In libdwarf.h
+.Ft int
+.Fo dwarf_hasattr
+.Fa "Dwarf_Die die"
+.Fa "Dwarf_Half attr"
+.Fa "Dwarf_Bool *ret_bool"
+.Fa "Dwarf_Error *err"
+.Fc
+.Sh DESCRIPTION
+Function
+.Fn dwarf_hasattr
+tests whether the debugging information entry referenced in argument
+.Ar die
+contains the attribute named by argument
+.Ar attr .
+Legal values for argument
+.Ar attr
+are those denoted by the
+.Dv DW_AT_*
+constants in the DWARF specification.
+.Pp
+If the named attribute is present in the debugging information entry,
+function
+.Fn dwarf_hasattr
+returns a non-zero value in the location pointed to by argument
+.Ar ret_bool .
+If the named attribute is not present, a zero is written instead.
+.Pp
+If argument
+.Ar err
+is not NULL, it will be used to return an error descriptor in case
+of an error.
+.Sh RETURN VALUES
+On success, function
+.Fn dwarf_hasattr
+returns
+.Dv DW_DLV_OK .
+In case of an error, it returns
+.Dv DW_DLV_ERROR
+and sets argument
+.Ar err .
+.Sh ERRORS
+Function
+.Fn dwarf_hasattr
+can fail with the following error:
+.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
+.It Bq Er DW_DLE_ARGUMENT
+Either of argument
+.Va die
+or
+.Va ret_bool
+was NULL.
+.El
+.Sh SEE ALSO
+.Xr dwarf 3 ,
+.Xr dwarf_attr 3 ,
+.Xr dwarf_whatattr 3