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build system: Generated makefiles should contain environment-variable-relative paths where possible

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Means that moving directories around then partial building should
succeed when possible.
This commit is contained in:
Angus Gratton 2016-11-10 10:29:42 +11:00
parent 2f0efe1510
commit f1938a909a
1 changed files with 22 additions and 8 deletions
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30
make/component_common.mk
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@ -58,19 +58,33 @@ COMPONENT_ADD_LDFLAGS ?= -l$(COMPONENT_NAME)
OWN_INCLUDES:=$(abspath $(addprefix $(COMPONENT_PATH)/,$(COMPONENT_ADD_INCLUDEDIRS) $(COMPONENT_PRIV_INCLUDEDIRS)))
COMPONENT_INCLUDES := $(OWN_INCLUDES) $(filter-out $(OWN_INCLUDES),$(COMPONENT_INCLUDES))
# This target is used to take component.mk variables COMPONENT_ADD_INCLUDEDIRS,
# COMPONENT_ADD_LDFLAGS and COMPONENT_DEPENDS and inject them into the project
# makefile level.
# macro to generate relative paths inside component_project_vars.mk, whenever possible
# ie put literal $(IDF_PATH), $(PROJECT_PATH) and $(BUILD_DIR_BASE) into the generated
# makefiles where possible.
#
# This means if directories move (breaking absolute paths), don't need to 'make clean'
define MakeRelativePath
$(subst $(IDF_PATH),$$(IDF_PATH),$(subst $(PROJECT_PATH),$$(PROJECT_PATH),$(subst $(BUILD_DIR_BASE),\$$(BUILD_DIR_BASE),$(1))))
endef
# This target generates component_project_vars.mk for the
# component. This is used to take component.mk variables
# COMPONENT_ADD_INCLUDEDIRS, COMPONENT_ADD_LDFLAGS and
# COMPONENT_DEPENDS and inject those into the project makefile.
#
# The target here has no dependencies, as the parent target in
# project.mk evaluates dependencies before calling down to here. See
# GenerateProjectVarsTarget in project.mk.
# GenerateComponentTargets macro in project.mk.
#
# If you are thinking of editing the output of this makefile for a
# component-specific feature, please don't! What you want is a
# Makefile.projbuild for your component (see docs/build-system.rst for more.)
component_project_vars.mk::
$(details) "Building component project variables list $(abspath $@)"
@echo "# Automatically generated build file. Do not edit." > $@
@echo "COMPONENT_INCLUDES += $(addprefix $(COMPONENT_PATH)/,$(COMPONENT_ADD_INCLUDEDIRS))" >> $@
@echo "COMPONENT_LDFLAGS += $(COMPONENT_ADD_LDFLAGS)" >> $@
@echo "$(COMPONENT_NAME)-build: $(addsuffix -build,$(COMPONENT_DEPENDS))" >> $@
@echo '# Automatically generated build file. Do not edit.' > $@
@echo 'COMPONENT_INCLUDES += $(call MakeRelativePath,$(addprefix $(COMPONENT_PATH)/,$(COMPONENT_ADD_INCLUDEDIRS)))' >> $@
@echo 'COMPONENT_LDFLAGS += $(call MakeRelativePath,$(COMPONENT_ADD_LDFLAGS))' >> $@
@echo '$(COMPONENT_NAME)-build: $(addsuffix -build,$(COMPONENT_DEPENDS))' >> $@
#Targets for build/clean. Use builtin recipe if component Makefile
#hasn't defined its own.