# www.lufa-lib.org
#
-LUFA_BUILD_MODULES += DOXYGEN
-LUFA_BUILD_TARGETS += doxygen
-LUFA_BUILD_MANDATORY_VARS += LUFA_PATH
-LUFA_BUILD_OPTIONAL_VARS += DOXYGEN_CONF DOXYGEN_FAIL_ON_WARNING DOXYGEN_OVERRIDE_PARAMS
+LUFA_BUILD_MODULES += DOXYGEN
+LUFA_BUILD_TARGETS += doxygen
+LUFA_BUILD_MANDATORY_VARS += LUFA_PATH
+LUFA_BUILD_OPTIONAL_VARS += DOXYGEN_CONF DOXYGEN_FAIL_ON_WARNING DOXYGEN_OVERRIDE_PARAMS
+LUFA_BUILD_PROVIDED_VARS +=
+LUFA_BUILD_PROVIDED_MACROS +=
# -----------------------------------------------------------------------------
# LUFA Doxygen Buildsystem Makefile Module.
# N to continue even if warnings occur
# DOXYGEN_OVERRIDE_PARAMS - Parameters to override in the doxygen
# configuration file
+# PROVIDED VARIABLES:
+#
+# (None)
+#
+# PROVIDED MACROS:
+#
+# (None)
+#
# -----------------------------------------------------------------------------
-ERROR_IF_UNSET = $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
-ERROR_IF_EMPTY = $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
-ERROR_IF_NONBOOL = $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
+SHELL = /bin/sh
+
+ERROR_IF_UNSET ?= $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
+ERROR_IF_EMPTY ?= $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
+ERROR_IF_NONBOOL ?= $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
# Default values of optionally user-supplied variables
DOXYGEN_CONF ?= Doxygen.conf
# Sanity check user supplied values
$(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
-$(call ERROR_IF_EMPTY, LUFA_PATH)
+$(call ERROR_IF_EMPTY, DOXYGEN_CONF)
$(call ERROR_IF_EMPTY, LUFA_PATH)
$(call ERROR_IF_NONBOOL, DOXYGEN_FAIL_ON_WARNING)