c++/3098: cygwin: undefined reference to `___deregister_frame_info_bases

[David dot Billinghurst at riotinto dot com]

>Number:         3098
>Category:       c++
>Synopsis:       cygwin:  undefined reference to `___deregister_frame_info_bases
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jun 09 12:16:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     David Billinghurst
>Release:        gcc 3.0 (pre-release)
>Organization:
>Environment:
i686-pc-cygwin
>Description:
This should be fixed before the 3.0 release.

On cygwin, many g++ (~600) and libstdc++-v3 (~40) tests fail with error:

/usr/local/obj/gcc/gcc/libgcc.a(unwind-dw2-fde.o): In function
`_deregister_frame': 
/usr/local/src/gcc/gcc/unwind-pe.h(.text+0x49b): undefined reference to
`___deregister_frame_info_bases'

This happens on both trunk and branch.

The problem is an additional leading underscore.

See:
  http://gcc.gnu.org/ml/gcc-bugs/2001-05/msg00842.html.
  http://gcc.gnu.org/ml/gcc-bugs/2001-05/msg00854.html 
>How-To-Repeat:
configure --enable-threads=posix
make check
>Fix:
Remove leading underscore.  Something like:

http://gcc.gnu.org/ml/gcc-bugs/2001-05/msg00854.html 
>Release-Note:
>Audit-Trail:
>Unformatted: