Add a _REENT_ERRNO() macro to encapsulate the access to the
_errno member of struct reent. This will help to replace the
structure member with a thread-local storage object in a follow
up patch.
Replace uses of __errno_r() with _REENT_ERRNO(). Keep __errno_r() macro for
potential users outside of Newlib.
Remove the pointer indirection through the read-only _global_impure_ptr and
directly use a externally visible _impure_data object of type struct _reent.
This enables the static initialization of global data structures in a follow up
patch. In addition, we get rid of a machine-specific file.
* libc/machine/spu/impure.c: New file, supply a non-static _impure_data.
* libc/machine/spu/Makefile.am: Add new file impure.c.
* libc/machine/spu/Makefile.in: Regenerate.
* libc/machine/spu/sys/errno.h: Define errno to be _reent_data._errno.
* libc/machine/spu/sys/errno.h: New file, so spu errno values match
ppu linux values. This file is a copy of the cris/sys/errno.h plus
a few changes (see spu errno.h comments).
Matt Joyce
Sebastian Huber
Yaakov Selkowitz
Jeff Johnston