[PATCH 5/7] Modify obstack.[hc] to avoid having to include other gnulib files

[Jeff Law]

On 11/07/2015 01:10 AM, Alan Modra wrote:
> Using the standard gnulib obstack source requires importing quite a
> lot of other files from gnulib, and requires build changes.
>
> If one did want to use gnulib obstack directly, then it would need to
> go in a sub-directory and after ".../gnulib-tool --import obstack"
> we'd have the following:
>
> ./lib:
> alignof.h   gettext.h    obstack.h    stdlib.in.h     unistd.in.h
> exitfail.c  Makefile.am  stddef.in.h  sys_types.in.h
> exitfail.h  obstack.c    stdint.in.h  unistd.c
>
> ./m4:
> 00gnulib.m4         gnulib-comp.m4   obstack.m4   stdint.m4       wchar_t.m4
> absolute-header.m4  gnulib-tool.m4   off_t.m4     stdlib_h.m4
> extern-inline.m4    include_next.m4  onceonly.m4  sys_types_h.m4
> gnulib-cache.m4     longlong.m4      ssize_t.m4   unistd_h.m4
> gnulib-common.m4    multiarch.m4     stddef_h.m4  warn-on-use.m4
>
> ./snippet:
> arg-nonnull.h  c++defs.h  _Noreturn.h  warn-on-use.h
>
> include/
> 	PR gdb/17133
> 	* obstack.h (__attribute_pure__): Expand _GL_ATTRIBUTE_PURE.
> libiberty/
> 	PR gdb/17133
> 	* obstack.c (__alignof__): Expand alignof_type from alignof.h.
> 	(obstack_exit_failure): Don't use exitfail.h.
> 	(_): Include libintl.h when HAVE_LIBINTL_H and nls enabled.
> 	Provide default.  Don't include gettext.h.
> 	(_Noreturn): Define.
> 	* obstacks.texi: Adjust node references to external libc info files.
Ewww.  I suspect we'll probably want to go with direct use of gnulib 
obstack at some point, but this hack-ish patch is OK for now.

jeff