configure: Define WINE_CROSSTEST when building crosstests, and disable use of config.h in that case.

Make.rules.in

@@ -143,7 +143,7 @@ filter: dummy
 	$(CC) -c $(ALLCFLAGS) -o $@ $<
 
 .c.cross.o:
-	$(CROSSCC) -c $(INCLUDES) $(DEFS) $(CPPFLAGS) $(CFLAGS) -o $@ $<
+	$(CROSSCC) -c $(INCLUDES) $(DEFS) -DWINE_CROSSTEST $(CPPFLAGS) $(CFLAGS) -o $@ $<
 
 .y.tab.c:
 	$(BISON) $(BISONFLAGS) -p $*_ -o $@ $<

configure.ac

@@ -2160,7 +2160,9 @@ esac
 
 dnl **** Generate output files ****
 
-AH_TOP([#define __WINE_CONFIG_H])
+AH_TOP([#ifndef WINE_CROSSTEST
+#define __WINE_CONFIG_H])
+AH_BOTTOM([#endif /* WINE_CROSSTEST */])
 
 AC_CONFIG_COMMANDS([include/stamp-h], [echo timestamp > include/stamp-h])
 

include/config.h.in

@@ -1,5 +1,6 @@
 /* include/config.h.in.  Generated from configure.ac by autoheader.  */
 
+#ifndef WINE_CROSSTEST
 #define __WINE_CONFIG_H
 
 /* Define to a function attribute for Microsoft hotpatch assembly prefix. */
@@ -1307,3 +1308,5 @@
 #ifndef __cplusplus
 #undef inline
 #endif
+
+#endif /* WINE_CROSSTEST */