Merge pull request #4708 from commodo/python-cffi-fix

libffi: fix location of host side headers ; python,python3: set correct build flags to host pip build

libs/libffi/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libffi
 PKG_VERSION:=3.2.1
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=ftp://sourceware.org/pub/libffi/
@@ -78,5 +78,15 @@ define Package/libffi/install
 		$(1)/usr/lib/
 endef
 
+define Host/Install
+	$(call Host/Install/Default)
+	# Adjust host libffi headers ; the default rule does
+	# not seem to install them to the proper include folder
+	$(INSTALL_DIR) $(STAGING_DIR_HOSTPKG)/include
+	$(CP) \
+		$(STAGING_DIR_HOSTPKG)/lib/libffi-$(PKG_VERSION)/include/*.h \
+		$(STAGING_DIR_HOSTPKG)/include
+endef
+
 $(eval $(call HostBuild))
 $(eval $(call BuildPackage,libffi))