fix keyed symbol names on tru64

[Richard Henderson <rth at redhat dot com>]

Keying symbols to global symbols works great with static linking, since
you wind up with multiply defined symbol errors.  With shared libraries,
however, you find that the _GLOBAL__* symbol can get overridden by the
main executable.  Which results in all sorts of confusion.

Fortunately, the Tru64 linker has a command-line switch to not export
symbols by pattern name.  This fixes a half-dozen check-g++ failures.



r~


        * config/alpha/osf.h (LINK_SPEC): Hide _GLOBAL_* symbols.

Index: osf.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/alpha/osf.h,v
retrieving revision 1.15.4.2
diff -c -p -d -r1.15.4.2 osf.h
*** osf.h	2001/06/07 17:02:42	1.15.4.2
--- osf.h	2001/06/11 16:07:24
*************** Boston, MA 02111-1307, USA.  */
*** 57,67 ****
  
  /* Pass "-G 8" to ld because Alpha's CC does.  Pass -O3 if we are
     optimizing, -O1 if we are not.  Pass -shared, -non_shared or
!    -call_shared as appropriate.  Also pass -pg.  */
  #define LINK_SPEC  \
    "-G 8 %{O*:-O3} %{!O*:-O1} %{static:-non_shared} \
!    %{!static:%{shared:-shared} %{!shared:-call_shared}} %{pg} %{taso} \
!    %{rpath*}"
  
  #define STARTFILE_SPEC  \
    "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}"
--- 57,69 ----
  
  /* Pass "-G 8" to ld because Alpha's CC does.  Pass -O3 if we are
     optimizing, -O1 if we are not.  Pass -shared, -non_shared or
!    -call_shared as appropriate.  Pass -hidden_symbol so that our
!    constructor and call-frame data structures are not accidentally
!    overridden.  */
  #define LINK_SPEC  \
    "-G 8 %{O*:-O3} %{!O*:-O1} %{static:-non_shared} \
!    %{!static:%{shared:-shared -hidden_symbol _GLOBAL_*} \
!    %{!shared:-call_shared}} %{pg} %{taso} %{rpath*}"
  
  #define STARTFILE_SPEC  \
    "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}"