compile.c: fix RB_GC_GUARD usage

* compile.c (iseq_build_from_ary_exception): move RB_GC_GUARD
  (iseq_build_from_ary_body): use PRIsVALUE instead of RB_GC_GUARD

Currently unused functions, but we should set good examples for
using RB_GC_GUARD (and favoring PRIsVALUE in format strings).

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47881 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Fixes build failures on Portable Native Client.

Note: Some of the fixes are for newlib in general but not NaCl-specific.

* include/ruby/intern.h (rb_fd_select): declare struct timeval, or the
  struct gets local to the function in C99.

* file.c (#include): add nacl/stat.h for PNaCl.
  (utimes): added a declaration for PNaCl.
  (stat_atimespec): stat::st_atimensec is long long but
  timespec::tv_nsec is long in PNaCl.
  (stat_mtimespec, stat_ctimespec): ditto.
  (rb_group_member): disable getgroups unless HAVE_GETGROUPS.
  (eaccess): unify the fallback to generic defined(USE_GETEUID).

* io.c: include sys/time.h for struct timeval.
  (rb_close_before_exec): nothing we can do if F_GETFD is not
  available.
  (ioctl): pnacl newlib actually doesn't have ioctl.

* process.c (maxgroups): it is used iff
   defined(_SC_NGROUPS_MAX) || defined(NGROUPS_MAX) but not
   defined(HAVE_GETGROUPS) || defined(HAVE_SETGROUPS).
  (obj2gid): fail unless the object is a Fixnum if getgrnam is not
  available.
  (disable_child_handler_fork_child): sigaction is not available in
  PNaCl newlib.

* configure.in (warnflags, strict_warnflags): avoid -ansi for strlcpy.
  (rb_cv_gcc_atomic_builtins): also check
  __atomic_or_etch because it is used in ruby_atomic.h.
  (rb_cv_gcc_sync_builtins): ditto.
  (HAVE_GETGRNAM): added.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47882 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ext/extmk.rb: generates the rule for extinit.$(OBJEXT).
  extinit.$(OBJEXT) used to be generated by the builtin rule, thus
  didn't accept custom $(CC) and caused linkage error for cross
  compiling.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47883 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* file.c (HAVE_UTIMENSAT): disabled for NativeClient.
  Fixes build error.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47884 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* remove trailing spaces.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47885 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
file.c: fix compile error on Linux

* file.c (sys/time.h): include after unistd.h to get rid of
  mismatch on struct stat and some system call functions on Linux.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47886 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-10-12

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47887 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* file.c: include sys/time.h only if HAVE_SYS_TIME_H

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47888 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* test/lib/test/unit.rb: Hide skips by default.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47889 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* vm.c: [DOC] fix typo by @yui-knk [Fixes GH-738]
  https://github.com/ruby/ruby/pull/738


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47890 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
symbol.c: rename rb_str_dynamic_intern

* internal.h (rb_str_dynamic_intern): remove.

* iseq.c, marshal.c, string.c: use rb_str_intern instead of
  rb_str_dynamic_intern.

* symbol.c (rb_str_intern): rename rb_str_dynamic_intern.
symbol.c: immortal IDs

* symbol.c (global_symbols): make IDs immortal always, instead
  of treating dynamic symbols as IDs.