Determine the need for mingw-related stubs at compile time rather than

	using not very significant $target_os.

ChangeLog

@@ -1,3 +1,8 @@
+2013-12-16  Vladimir Serbinenko  <[email protected]>
+
+	Determine the need for mingw-related stubs at compile time rather than
+	using not very significant $target_os.
+
 2013-12-16  Vladimir Serbinenko  <[email protected]>
 
 	* grub-core/genmod.sh.in: Strip before converting to ELF as strip

configure.ac

@@ -693,16 +693,6 @@ if test "x$grub_cv_cc_fno_asynchronous_unwind_tables" = xyes; then
   TARGET_CFLAGS="$TARGET_CFLAGS -fno-asynchronous-unwind-tables"
 fi
 
-# For platforms where ELF is not the default link format.
-case "${target_os}" in
-  cygwin)
-# FIXME: put proper test here
-  NEED_REGISTER_FRAME_INFO=1
-  ;;
-  *) NEED_REGISTER_FRAME_INFO=0 ;;
-esac
-
-
 AC_ARG_ENABLE([efiemu],
 	      [AS_HELP_STRING([--enable-efiemu],
                              [build and install the efiemu runtimes (default=guessed)])])

grub-core/kern/misc.c

@@ -1283,14 +1283,21 @@ grub_fatal (const char *fmt, ...)
   grub_abort ();
 }
 
-#if NEED_REGISTER_FRAME_INFO && !defined(GRUB_UTIL)
+#if (defined (__MINGW32__) || defined (__CYGWIN__)) && !defined(GRUB_UTIL)
 void __register_frame_info (void)
 {
 }
 
 void __deregister_frame_info (void)
 {
 }
+void ___chkstk_ms (void)
+{
+}
+
+void __chkstk_ms (void)
+{
+}
 #endif
 
 #if BOOT_TIME_STATS

include/grub/misc.h

@@ -377,9 +377,11 @@ grub_uint64_t EXPORT_FUNC(grub_divmod64) (grub_uint64_t n,
 					  grub_uint64_t d,
 					  grub_uint64_t *r);
 
-#if !defined(GRUB_UTIL) && NEED_REGISTER_FRAME_INFO
+#if (defined (__MINGW32__) || defined (__CYGWIN__)) && !defined(GRUB_UTIL)
 void EXPORT_FUNC (__register_frame_info) (void);
 void EXPORT_FUNC (__deregister_frame_info) (void);
+void EXPORT_FUNC (___chkstk_ms) (void);
+void EXPORT_FUNC (__chkstk_ms) (void);
 #endif
 
 /* Inline functions.  */