diff -r 4c97d2d464ad Lib/plat-generic/regen
--- a/Lib/plat-generic/regen	Fri Jan 25 14:44:00 2013 +0100
+++ b/Lib/plat-generic/regen	Fri Jan 25 15:12:33 2013 +0100
@@ -1,3 +1,3 @@
 #! /bin/sh
 set -v
-python$EXE ../../Tools/scripts/h2py.py -i '(u_long)' /usr/include/netinet/in.h
+eval $PYTHON_FOR_BUILD ../../Tools/scripts/h2py.py -i "'(u_long)'" /usr/include/netinet/in.h
diff -r 4c97d2d464ad Makefile.pre.in
--- a/Makefile.pre.in	Fri Jan 25 14:44:00 2013 +0100
+++ b/Makefile.pre.in	Fri Jan 25 15:12:33 2013 +0100
@@ -203,7 +203,8 @@
 
 PYTHON_FOR_BUILD=@PYTHON_FOR_BUILD@
 _PYTHON_HOST_PLATFORM=@_PYTHON_HOST_PLATFORM@
-HOST_GNU_TYPE=  @host@
+BUILD_GNU_TYPE=	@build@
+HOST_GNU_TYPE=	@host@
 
 # The task to run while instrument when building the profile-opt target
 PROFILE_TASK=	$(srcdir)/Tools/pybench/pybench.py -n 2 --with-gc --with-syscheck
@@ -1123,6 +1124,12 @@
 	export DYLD_FRAMEWORK_PATH; DYLD_FRAMEWORK_PATH="`pwd`"; \
 	export EXE; EXE="$(BUILDEXE)"; \
 	if [ -n "$(MULTIARCH)" ]; then export MULTIARCH; MULTIARCH=$(MULTIARCH); fi; \
+	export PYTHON_FOR_BUILD; \
+	if [ "$(BUILD_GNU_TYPE)" = "$(HOST_GNU_TYPE)" ]; then \
+	  PYTHON_FOR_BUILD="$(BUILDPYTHON)"; \
+	else \
+	  PYTHON_FOR_BUILD="$(PYTHON_FOR_BUILD)"; \
+	fi; \
 	cd $(srcdir)/Lib/$(PLATDIR); $(RUNSHARED) ./regen
 
 python-config: $(srcdir)/Misc/python-config.in
diff -r 4c97d2d464ad configure.ac
--- a/configure.ac	Fri Jan 25 14:44:00 2013 +0100
+++ b/configure.ac	Fri Jan 25 15:12:33 2013 +0100
@@ -50,6 +50,8 @@
 AC_CONFIG_HEADER(pyconfig.h)
 
 AC_CANONICAL_HOST
+AC_SUBST(build)
+AC_SUBST(host)
 
 if test "$cross_compiling" = yes; then
     AC_MSG_CHECKING([for python interpreter for cross build])