PATCH: Error if C++ `init_priority' Attribute Not Supported

[Jeffrey Oldham]

If an architecture's linker does not support the gcc C++ attribute
init_priority but it is used, issue an error that it is not supported.
The macro "SUPPORTS_INIT_PRIORITY", which may be set in a
configuration file, should be undefined if the attribute is not
supported.

gcc/ChangeLog:
2001-01-14  Jeffrey Oldham  <oldham@codesourcery.com>

        * defaults.h (SUPPORTS_INIT_PRIORITY): New macro to indicate the
        linker supports the init_priority C++ attribute.
        * tm.texi (SUPPORTS_INIT_PRIORITY): Documentation for new macro.
        * config/mips/iris6.h (SUPPORTS_INIT_PRIORITY): Indicate Irix
        linker does not support init_priority C++ attribute.

gcc/cp/ChangeLog:
2001-01-14  Jeffrey Oldham  <oldham@codesourcery.com>

        * tree.c: Add defaults.h.
        (cp_valid_lang_attribute): Incorporate SUPPORTS_INIT_PRIORITY.
        * Make-lang.in (cp/tree.o): Add defaults.h.

Tested on       mips-sgi-irix6.5 and i686-pc-linux-gnu
Approved by     Mark Mitchell (mark@codesourcery.com)

Thanks,
Jeffrey D. Oldham
oldham@codesourcery.com