Minor build system sanity check fixes.
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					 3 changed files with 4 additions and 6 deletions
				
			
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			@ -55,9 +55,9 @@ LUFA_BUILD_OPTIONAL_VARS  += BOARD OPTIMIZATION C_STANDARD CPP_STANDARD F_CPU C_
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#
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# -----------------------------------------------------------------------------
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ERROR_IF_UNSET     = $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
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ERROR_IF_EMPTY     = $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
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ERROR_IF_NONBOOL   = $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
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ERROR_IF_UNSET   = $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
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ERROR_IF_EMPTY   = $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
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ERROR_IF_NONBOOL = $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
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# Default values of optionally user-supplied variables
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BOARD           ?= NONE
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			@ -42,8 +42,6 @@ ERROR_IF_NONBOOL = $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(st
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# Sanity-check values of mandatory user-supplied variables
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$(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
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$(call ERROR_IF_UNSET, MCU)
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$(call ERROR_IF_UNSET, TARGET)
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$(call ERROR_IF_EMPTY, MCU)
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$(call ERROR_IF_EMPTY, TARGET)
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			@ -46,7 +46,7 @@ DOXYGEN_OVERRIDE_PARAMS ?= QUIET=YES HTML_STYLESHEET=$(patsubst %/,%,$(LUFA_PATH
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# Sanity check user supplied values
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$(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
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$(call ERROR_IF_EMPTY, LUFA_PATH)
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$(call ERROR_IF_EMPTY, DOXYGEN_CONF)
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$(call ERROR_IF_EMPTY, LUFA_PATH)
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$(call ERROR_IF_NONBOOL, DOXYGEN_FAIL_ON_WARNING)
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