this patch contains r54158, r57410, r57631 and r57954.

	Prevent GC by volatile [Bug #13150]

	test/ruby/test_marshal.rb test_context_switch (load) and test_gc (dump)
	are failed on FreeBSD 10.3 and gcc7 (FreeBSD Ports Collection) 7.0.0
	20170115 (experimental); RB_GC_GUARD looks not worked well.

	* include/ruby/ruby.h (RB_GC_GUARD): prevent guarded pointer from
	  optimization by using as an input to inline asm.

	* ruby.h: remove comment

	* include/ruby/ruby.h (RB_GC_GUARD): remove comment unsupported by
	  Solaris AS.

	Hidden objects (klass == 0) are not visible to Ruby code invoked
	from other threads or signal handlers, so they can never be
	accessed from other contexts.  This makes it safe to call
	rb_gc_force_recycle on the object slot after releasing malloc
	memory.

	* marshal.c (rb_marshal_dump_limited): hide dump_arg and recycle when
	  done (rb_marshal_load_with_proc): hide load_arg and recycle when done
	  [ruby-core:79518]

	* marshal.c (rb_marshal_dump_limited): do not free dump_arg, which
	  may be dereferenced in check_dump_arg due to continuation, and
	  get rid of dangling pointers.

	* marshal.c (rb_marshal_load_with_proc): ditto for load_arg.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@59539 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	broken mingw

	* configure.in: check whether frexp and modf are broken.

	* include/ruby/win32.h (frexp, modf): ignore bad declarations when
	  compiling as C++.  [ruby-core:79859] [Bug #13267]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@58182 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* bignum.c (rb_big_hash): make it public function to be available in
	  other source files, and remove documentation comment for Bignum#hash.

	* bignum.c (Bignum#hash): remove its definition because it is unified
	  with Object#hash.

	* include/ruby/intern.h (rb_big_hash): add a prototype declaration.

	* hash.c (any_hash): treat Bignum values directly.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55633 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* ext/bigdecimal/bigdecimal.c (GetVpValueWithPrec): consider
	  non-finite float values not to raise FloatDomainError.
	  [ruby-core:75682] [Bug #12414]

	* ext/bigdecimal/bigdecimal.c (isfinite): isfinite does not always
	  exist.  fixed build error on Windows introduced at r55123.

	* ext/bigdecimal/bigdecimal.c (isfinite): get rid of a warning on
	  cygwin. [Bug #12417][ruby-core:75691]

	* include/ruby/missing.h (isfinite): move from numeric.c.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55445 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* win32/win32.c, include/ruby/win32.h (rb_w32_utruncate): implements new
	  truncate alternative which accepts UTF-8 path.

	* file.c (truncate): use above function.
	  [Bug #12340]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55400 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* include/ruby/win32.h (O_SHARE_DELETE): change to fit Fixnum
	  limit.  [ruby-core:74285] [Bug #12171]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54412 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* ruby.h: undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
	  and HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P on C++.
	  [ruby-core:72736] [Bug #11962]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54364 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

        * compile.c, cont.c, doc, man: fix common misspelling.
          [ruby-core:72466] [Bug #11870]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54351 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* include/ruby/missing.h (explicit_bzero_by_memset_s): remove
	  inline implementation by memset_s, which needs a macro before
	  including headers and can cause problems in extension libraries
	  by the order of the macro and headers.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@53502 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* error.c (rb_compile_error_with_enc, rb_compile_error),
  (rb_compile_bug): deprecate internal functions.
* parse.y (parser_yyerror): construct exception message with
  source code and carret.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53279 b2dd03c8-39d4-4d8f-98ff-823fe69b080e