Current ubsan complains on every use of __PTR_ALIGN (when ptrdiff_t is
as large as a pointer), due to making calculations relative to a NULL
pointer.  This patch avoids the problem by extracting out and
simplifying __BPTR_ALIGN for the usual case.  I've continued to use
ptrdiff_t here, where it might be better to throw away __BPTR_ALIGN
entirely and just assume uintptr_t exists.

	* obstack.h (__PTR_ALIGN): Expand and simplify __BPTR_ALIGN
	rather than calculating relative to a NULL pointer.

From-SVN: r279813

From-SVN: r267494

From-SVN: r256169

From-SVN: r244052

Using the standard gnulib obstack source requires importing quite a
lot of other files from gnulib, and requires build changes.

include/
	* obstack.h (__attribute_pure__): Expand _GL_ATTRIBUTE_PURE.
libiberty/
	* 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.

From-SVN: r229988

This copies obstack.[ch] from gnulib, and updates the docs.  The next
patch should be applied if someone repeats the import at a later date.

include/
	* obstack.h: Import current gnulib file.
libiberty/
	* obstack.c: Import current gnulib file.
	* obstacks.texi: Updated doc, from glibc's manual/memory.texi.

From-SVN: r229987

From-SVN: r225781

* obstack.h [!GNUC] (obstack_free): Avoid cast to int.
* ansidecl.h (ENUM_BITFIELD): Always use enum in C++

From-SVN: r180321

	* obstack.h (obstack_finish <!__GNUC__>): Cast result to void *.

From-SVN: r141254

From-SVN: r99518

include/
2005-03-27  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        * partition.h: Remove use of PARAMS.
        * obstack.h: Remove conditional prototypes __STDC__.
        * objalloc.h:  Remove use of PARAMS.
        * splay-tree.h: Likewise.

libiberty/
2005-03-27  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        Convert libiberty to use ISO C prototype style 5/n.
        * random.c (srandom, initstate, setstate, random): Use ISO C
        prototypes.
        * putenv.c (putenv): Likewise.
        * physmem.c (physmem_available, physmem_total, main):
        Likewise.
        * pex-win32.c (fix_argv, pexecute, pwait): Likewise.
        * pex-unix.c (pexecute, pwait): Likewise.
        * pex-msdos.c (pexecute, pwait): Likewise.
        * pex-djgpp.c (pexecute, pwait): Likewise.
        * partition.c (partition_new, partition_delete,
        partition_union)
        (elem_compare, partition_print): Likewise.
        * obstack.c (_obstack_begin, _obstack_begin_1,
        _obstack_newchunk,
        _obstack_allocated_p, _obstack_free, obstack_free,
        _obstack_memory_used, print_and_abort, obstack_next_free,
        obstack_object_size, obstack_base): Likewise.  Remove codes
        predicated on !defined(__STDC__).
        * objalloc.c (objalloc_create, _objalloc_alloc, objalloc_free,
        objalloc_free_block): Use ISO C prototypes.
        * mkstemps.c (mkstemps): Likewise.
        * memset.c (memset): Likewise.
        * mempcpy.c (mempcpy): Likewise.
        * rename.c (rename): Likewise.
        * rindex.c (rindex): Likewise.
        * setenv.c (setenv, unsetenv): Likewise.
        * sigsetmask.c (sigsetmask): Likewise.
        * snprintf.c (snprintf): Likewise.
        * sort.c (sort_pointers, xmalloc): Likewise.
        * spaces.c (spaces): Likewise.
        * splay-tree.c (splay_tree_delete_helper,
        splay_tree_splay_helper, splay_tree_splay,
        splay_tree_foreach_helper, splay_tree_xmalloc_allocate,
        splay_tree_new, splay_tree_xmalloc_allocate,
        splay_tree_new_with_allocator, splay_tree_delete,
        splay_tree_insert, splay_tree_remove, splay_tree_lookup,
        splay_tree_max, splay_tree_min, splay_tree_predecessor,
        splay_tree_successor, splay_tree_foreach,
        splay_tree_compare_ints, splay_tree_compare_pointers):
        Likewise.
        * stpcpy.c (stpcpy): Likewise.
        * stpncpy.c (stpncpy): Likewise.
        * strcasecmp.c (strcasecmp): Likewise.
        * strchr.c (strchr): Likewise.
        * strdup.c (strdup): Likewise.

From-SVN: r97125

	* libiberty.h (ASTRDUP): Add casts required for stricter
	type conversion rules of C++.
	* obstack.h (obstack_free): Likewise.

From-SVN: r84642

include:
	* obstack.h: Merge the following change from gnulib:
	2003-10-21  Paul Eggert  <eggert@twinsun.com>
	* obstack.h (obstack_1grow_fast): Properly parenthesize arg.
	(obstack_ptr_grow_fast, obstack_int_grow_fast):
	Don't use lvalue casts, as GCC plans to remove support for them
	in GCC 3.5.  Reported by Joseph S. Myers.  This bug
	was also present in the non-GCC version, indicating that this
	code had always been buggy and had never been widely used.
	(obstack_1grow, obstack_ptr_grow, obstack_int_grow, obstack_blank):
	Use the fast variant of each macro, rather than copying the
	definiens of the fast variant; that way, we'll be more likely to
	catch future bugs in the fast variants.

gcc:
	* c-typeck.c (pedantic_lvalue_warning): Unconditionally warn of
	deprecation of casts as lvalues.
	* fixinc/inclhack.def (obstack_lvalue_cast): New fix.
	* fixinc/fixincl.x: Regenerate.
	* fixinc/tests/base/obstack.h: New test.

gcc/testsuite:
	* gcc.dg/cast-lvalue-1.c: New test.

From-SVN: r72826

From-SVN: r40469

From-SVN: r38086

	* obstack.h (obstack_grow, obstack_grow0): Move (char*) casts
	in calls to `_obstack_memcpy' from here ...

	(_obstack_memcpy): ... to here, except in the __STDC__ case which
	doesn't need it.

From-SVN: r29028

From-SVN: r22260

From-SVN: r14877

From-SVN: r14764

From-SVN: r14274

From-SVN: r14270

From-SVN: r14269

From-SVN: r14127

From-SVN: r14126