Ruby

YJIT: Add frozen guard for struct aset (#15835)

We used to just skip this check (oops), but we should not allow
modifying frozen objects.

YJIT: gen_struct_aset check for frozen status

Optimize rb_mark_generic_ivar for T_DATA and T_STRUCT

T_DATA and T_STRUCT could have ivars but might not use the generic_fields_tbl.
This commit skips lookup in the generic_fields_tbl for those cases.

Rename alloca_overflow to stack_overflow

alloca is an implementation detail to raise a stack overflow.

Use assert_ruby_status if no assertion

Make assert_separately to count assertions in forked processes

Make assert_separately tolerant to core method redefinitions

And split TestRubyOptimization#test_objtostring for each target
class.

Fix integer overflow checks in enumerator

Win32: configure without an intermediate makefile

This batch file used nmake on the old command.com to extract the
parent directory name of this file and to get around the command line
argument length limit. However, Windows 9X support as a build host...

[ruby/mmtk] Assert that objects are not T_NONE in the write barrier

https://github.com/ruby/mmtk/commit/59d27203e2