Build system: Use ifndef X in makefiles instead of ifeq("$(X)","")
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@ -8,7 +8,7 @@
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#
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# CWD is the build directory of the component.
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ifeq ("$(PROJECT_PATH)","")
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ifndef PROJECT_PATH
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$(error Make was invoked from $(CURDIR). However please do not run make from the sdk or a component directory; invoke make from the project directory. See the ESP-IDF README for details.)
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endif
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@ -60,7 +60,7 @@ include $(COMPONENT_MAKEFILE)
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# Object files which need to be linked into the library
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# By default we take all .c, .cpp & .S files in COMPONENT_SRCDIRS.
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ifeq ("$(COMPONENT_OBJS)", "")
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ifndef COMPONENT_OBJS
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# Find all source files in all COMPONENT_SRCDIRS
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COMPONENT_OBJS := $(foreach compsrcdir,$(COMPONENT_SRCDIRS),$(patsubst %.c,%.o,$(wildcard $(COMPONENT_PATH)/$(compsrcdir)/*.c)))
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COMPONENT_OBJS += $(foreach compsrcdir,$(COMPONENT_SRCDIRS),$(patsubst %.cpp,%.o,$(wildcard $(COMPONENT_PATH)/$(compsrcdir)/*.cpp)))
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@ -120,7 +120,7 @@ component_project_vars.mk::
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# If COMPONENT_OWNBUILDTARGET is not set, define a phony build target and
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# a COMPONENT_LIBRARY link target.
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ifeq ("$(COMPONENT_OWNBUILDTARGET)", "")
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ifndef COMPONENT_OWNBUILDTARGET
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.PHONY: build
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build: $(COMPONENT_LIBRARY)
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@mkdir -p $(COMPONENT_SRCDIRS)
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@ -134,7 +134,7 @@ $(COMPONENT_LIBRARY): $(COMPONENT_OBJS)
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endif
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# If COMPONENT_OWNCLEANTARGET is not set, define a phony clean target
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ifeq ("$(COMPONENT_OWNCLEANTARGET)", "")
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ifndef COMPONENT_OWNCLEANTARGET
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CLEAN_FILES = $(COMPONENT_LIBRARY) $(COMPONENT_OBJS) $(COMPONENT_OBJS:.o=.d) $(COMPONENT_EXTRA_CLEAN) component_project_vars.mk
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.PHONY: clean
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clean:
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@ -40,10 +40,9 @@ help:
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MAKEFLAGS_OLD := $(MAKEFLAGS)
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MAKEFLAGS +=-rR
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# Figure out PROJECT_PATH if not set
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ifeq ("$(PROJECT_PATH)","")
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#The path to the project: we assume the Makefile including this file resides
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#in the root of that directory.
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# Default path to the project: we assume the Makefile including this file
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# is in the project directory
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ifndef PROJECT_PATH
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PROJECT_PATH := $(abspath $(dir $(firstword $(MAKEFILE_LIST))))
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export PROJECT_PATH
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endif
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@ -67,7 +66,7 @@ SRCDIRS ?= main
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# The project Makefile can define a list of components, but if it does not do this we just take
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# all available components in the component dirs.
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ifeq ("$(COMPONENTS)","")
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ifndef COMPONENTS
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# Find all component names. The component names are the same as the
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# directories they're in, so /bla/components/mycomponent/ -> mycomponent. We then use
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# COMPONENT_DIRS to build COMPONENT_PATHS with the full path to each component.
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