ada/6853: building gnatlib fails on newlib targets that don't provide dirent.h

[geoffk@redhat.com]

>Number:         6853
>Category:       ada
>Synopsis:       building gnatlib fails on newlib targets that don't provide dirent.h
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 28 18:26:02 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     geoffk@redhat.com
>Release:        3.1
>Organization:
>Environment:

>Description:
ada/adaint.h unconditionally includes dirent.h.  Many
embedded targets don't have files and therefore don't have
directories or directory entries.  Other parts of the Ada
runtime library would still be useful on these systems.
>How-To-Repeat:
<path>/configure --target=powerpc-eabisim --prefix=<somewhere that has an installed newlib & binutils>
make
make -C gcc gnatlib
>Fix:
Use configure to detect presence or absence of those
headers that aren't in ISO C.
>Release-Note:
>Audit-Trail:
>Unformatted: