Build failure in dwarf2out.c for sh target

[Andrew Stubbs]

The GCC 3.0 snapshot 20010521 build fails with the error:

gcc-20010521/gcc/dwarf2out.c:1598: `ACCUMULATE_OUTGOING_ARGS' undeclared
(first use in this function)

The host is i686-pc-linux-gnu and the target is sh-hitachi-elf.

This failure is almost certainly because ACCUMULATE_OUTGOING_ARGS is not
defined for the sh architecture (unlike many others).

The problem appears to be fixed by adding the following three lines near
the top of dwarf2out.c:

#ifndef ACCUMULATE_OUTGOING_ARGS
#define ACCUMULATE_OUTGOING_ARGS 0
#endif

This idiom appears to be used in a number of other files. If this is
indeed the correct solution then I can send a patch file if necessary.

------------------------------------------------------------------------
|  Andrew Stubbs,                   |  E-mail: Andrew.Stubbs@st.com    |
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