Include <config.h> in gen-scmconfig even when cross-compiling.

Partially reverts 8cb0d6d7fa.

* libguile/Makefile.am (gen-scmconfig.$(OBJEXT)): Remove
  -DCROSS_COMPILING=1 from cross-compiling case.
* libguile/gen-scmconfig.c: Include <config.h> regardless of
  whether CROSS_COMPILING is defined.

libguile/Makefile.am

@@ -60,13 +60,12 @@ gen_scmconfig_SOURCES = gen-scmconfig.c
 ## the generated config.h and gen-scmconfig.h.  Nothing else from Guile
 ## is included by this code generator.
 gen-scmconfig.$(OBJEXT): gen-scmconfig.c
-	$(AM_V_GEN)						\
-	if [ "$(cross_compiling)" = "yes" ]; then		\
-		$(CC_FOR_BUILD) -DCROSS_COMPILING=1 $(DEFS)	\
-		   $(DEFAULT_INCLUDES) -I$(top_builddir)	\
-		   -c -o "$@" "$<";				\
-	else							\
-		$(COMPILE) -c -o "$@" "$<";			\
+	$(AM_V_GEN) \
+	if [ "$(cross_compiling)" = "yes" ]; then \
+		$(CC_FOR_BUILD) $(DEFS) $(DEFAULT_INCLUDES) -I$(top_builddir) \
+		   -c -o $@ $<; \
+	else \
+		$(COMPILE) -c -o $@ $<; \
 	fi
 
 ## Override default rule; this should run on BUILD host.

libguile/gen-scmconfig.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2013 Free Software Foundation, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public License
@@ -132,10 +132,8 @@
 
  **********************************************************************/
 
-/* Don't include <config.h> when cross-compiling because it contains
-   information about the host, not about the build machine.  */
-#ifndef CROSS_COMPILING
-# include <config.h>
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
 #endif
 
 #include <libguile/gen-scmconfig.h>