Win32: Remove unreferenced COMDAT from object files

Windows 11 SDK Version 10.0.26100.0 introduced a new internal inline
function in ucrt/corecrt_math.h.  Even it appears in object files and
will be included in the DEF file, it will be removed from the DLL and
result in a linker error.

Author: nobu

win32/Makefile.sub

@@ -163,6 +163,9 @@ OPTFLAGS = -O2b2xg-
 OPTFLAGS = -O2sy-
 !endif
 !endif
+!if $(MSC_VER) >= 1900
+OPTFLAGS = $(OPTFLAGS) -Zc:inline
+!endif
 !if !defined(incflags)
 incflags =
 !endif

win32/mkexports.rb

@@ -122,7 +122,6 @@ def each_export(objs)
           elsif !l.sub!(/^(\S+) \([^@?\`\']*\)$/, '\1')
             next
           end
-          next if /\A_?ucrt_/ =~ l
         when /DLL/
           next unless l.sub!(/^\s*\d+\s+[[:xdigit:]]+\s+[[:xdigit:]]+\s+/, '')
         else