Win: Fix --without-baseruby option

This option in `win32/configure.bat` was completely broken.
Also honor `HAVE_BASERUBY` than `BASERUBY` value, and use
`missing-baseruby.bat` to check the version.

Author: nobu

win32/Makefile.sub

@@ -17,7 +17,9 @@ tooldir = $(srcdir)/tool
 MFLAGS=-l
 !endif
 
-!if "$(BASERUBY)" == ""
+!if "$(HAVE_BASERUBY)" == "no"
+BASERUBY =
+!else if "$(BASERUBY)" == ""
 # After `nmake`, just built `ruby.exe` exists in the build directory,
 # and is searched first prior to $PATH.  Assume that no ruby
 # executable in $(tooldir).
@@ -28,7 +30,7 @@ MFLAGS=-l
 ! endif
 ! if [del baseruby.mk 2> nul]
 ! endif
-!else if "$(BASERUBY)" == "no" || [($(BASERUBY) -eexit) > nul 2> nul]
+!else if [($(BASERUBY) $(tooldir)/missing-baseruby.bat) > nul 2> nul]
 BASERUBY =
 !endif
 !if "$(BASERUBY)" == ""
@@ -122,9 +124,6 @@ TOUCH = $(BASERUBY) -run -e touch --
 CP = copy > nul
 MV = move > nul
 RM1 = del /f /q
-!if !defined(BASERUBY)
-BASERUBY = ruby
-!endif
 !if !defined(TEST_RUNNABLE)
 TEST_RUNNABLE = yes
 !endif

win32/configure.bat

@@ -51,7 +51,7 @@ if "%1" == "--disable-rubygems" goto :disable-rubygems
 if "%1" == "--extout" goto :extout
 if "%1" == "--path" goto :path
 if "%1" == "--with-baseruby" goto :baseruby
-if "%1" == "--without-baseruby" goto :baseruby
+if "%1" == "--without-baseruby" goto :nobaseruby
 if "%1" == "--with-ntver" goto :ntver
 if "%1" == "--with-libdir" goto :libdir
 if "%1" == "--with-git" goto :git
@@ -208,14 +208,16 @@ goto :loop ;
   shift
 goto :loop ;
 :baseruby
+  echo>> %config_make% HAVE_BASERUBY =
   echo>> %config_make% BASERUBY = %~2
   echo>>%confargs%  %1=%2 \
   shift
   shift
 goto :loop ;
 :nobaseruby
   echo>> %config_make% HAVE_BASERUBY = no
-  echo>>%confargs%  %1=%2 \
+  echo>> %config_make% BASERUBY =
+  echo>>%confargs%  %1 \
   shift
 goto :loop ;
 :libdir

win32/setup.mak

@@ -46,7 +46,7 @@ prefix = $(prefix:\=/)
 <<
 	@type $(config_make) >>$(MAKEFILE)
 	@del $(config_make) > nul
-!if defined(BASERUBY)
+!if "$(HAVE_BASERUBY)" != "no" && "$(BASERUBY)" != ""
 	$(BASERUBY:/=\) "$(srcdir)/tool/missing-baseruby.bat"
 !endif
 !if "$(WITH_GMP)" != "no"