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-rw-r--r--tests/vm/Makefile.include10
1 files changed, 9 insertions, 1 deletions
diff --git a/tests/vm/Makefile.include b/tests/vm/Makefile.include
index a58383d263..992d823f6b 100644
--- a/tests/vm/Makefile.include
+++ b/tests/vm/Makefile.include
@@ -19,6 +19,11 @@ vm-test:
 	@echo ""
 	@echo "  vm-build-all                    - Build QEMU in all VMs"
 	@echo "  vm-clean-all                    - Clean up VM images"
+	@echo
+	@echo "Special variables:"
+	@echo "    BUILD_TARGET=foo		 - override the build target"
+	@echo "    TARGET_LIST=a,b,c    	 - Override target list in builds."
+	@echo '    EXTRA_CONFIGURE_OPTS="..."'
 
 vm-build-all: $(addprefix vm-build-, $(IMAGES))
 
@@ -47,6 +52,9 @@ vm-build-%: $(IMAGES_DIR)/%.img
 		$(if $(J),--jobs $(J)) \
 		$(if $(V),--verbose) \
 		--image "$<" \
-		--build-qemu $(SRC_PATH), \
+		$(if $(BUILD_TARGET),--build-target $(BUILD_TARGET)) \
+		--build-qemu $(SRC_PATH) -- \
+		$(if $(TARGET_LIST),--target-list=$(TARGET_LIST)) \
+		$(if $(EXTRA_CONFIGURE_OPTS),$(EXTRA_CONFIGURE_OPTS)), \
 		"  VM-BUILD $*")