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Makefile: Improve handling of board symbolic link creation 

Running "make" directly after a "make distclean" can lead to a corrupt
out/board symbolic link.  Rework the make rules so that the board
symbolic link is created in a new make instance that has the updated
definition of CONFIG_BOARD_DIRECTORY.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2022-02-03 17:23:34 -05:00
parent 427f4b456e
commit 0143199175
1 changed files with 8 additions and 4 deletions
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12
Makefile
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@ -85,17 +85,21 @@ $(OUT)compile_time_request.o: $(patsubst %.c, $(OUT)src/%.o.ctr,$(src-y)) ./scri
################ Auto generation of "board/" include file link
$(OUT)board-link: $(KCONFIG_CONFIG)
create-board-link:
@echo " Creating symbolic link $(OUT)board"
$(Q)mkdir -p $(addprefix $(OUT), $(dirs-y))
$(Q)echo "#$(CONFIG_BOARD_DIRECTORY)" > $@.temp
$(Q)if ! cmp -s $@.temp $@; then rm -f $(OUT)*.d $(patsubst %,$(OUT)%/*.d,$(dirs-y)) ; mv $@.temp $@ ; fi
$(Q)rm -f $(OUT)*.d $(patsubst %,$(OUT)%/*.d,$(dirs-y))
$(Q)rm -f $(OUT)board
$(Q)ln -sf $(CURDIR)/src/$(CONFIG_BOARD_DIRECTORY) $(OUT)board
$(Q)mkdir -p $(OUT)board-generic
$(Q)rm -f $(OUT)board-generic/board
$(Q)ln -sf $(CURDIR)/src/generic $(OUT)board-generic/board
# Hack to rebuild OUT directory and reload make dependencies on Kconfig change
$(OUT)board-link: $(KCONFIG_CONFIG)
$(Q)mkdir -p $(OUT)
$(Q)echo "# Makefile board-link rule" > $@
$(Q)$(MAKE) create-board-link
include $(OUT)board-link
################ Kconfig rules
@ -114,7 +118,7 @@ menuconfig:
################ Generic rules
# Make definitions
.PHONY : all clean distclean olddefconfig menuconfig FORCE
.PHONY : all clean distclean olddefconfig menuconfig create-board-link FORCE
.DELETE_ON_ERROR:
all: $(target-y)