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[build] Avoid deleting config header files if build is interrupted 

With extremely unlucky timing, it is possible to interrupt a build and
cause make to delete config/named.h (and possibly any local
configuration headers).

Mark config/named.h and all local configuration headers as .PRECIOUS
to prevent make from ever deleting them.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/27/merge
Michael Brown 2014-08-26 15:05:48 +01:00
parent df202b3f4d
commit bfe9f06f9b
1 changed files with 15 additions and 2 deletions
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17
src/Makefile.housekeeping
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@ -717,6 +717,8 @@ endif
config/named.h : $(CONFIG_LIST) config/named.h : $(CONFIG_LIST)
$(Q)$(TOUCH) $@ $(Q)$(TOUCH) $@
.PRECIOUS : config/named.h
# These files use .incbin inline assembly to include a binary file. # These files use .incbin inline assembly to include a binary file.
# Unfortunately ccache does not detect this dependency and caches # Unfortunately ccache does not detect this dependency and caches
# builds even when the binary file has changed. # builds even when the binary file has changed.
@ -1289,14 +1291,25 @@ CLEANUP += $(EINFO)
# Local configs # Local configs
# #
CONFIG_HEADERS := $(patsubst config/%,%,$(wildcard config/*.h)) CONFIG_HEADERS := $(patsubst config/%,%,$(wildcard config/*.h))
CONFIG_LOCAL_HEADERS := $(foreach HEADER,$(CONFIG_HEADERS),\
config/local/$(HEADER))
$(foreach HEADER,$(CONFIG_HEADERS),config/local/$(HEADER)) : $(CONFIG_LOCAL_HEADERS) :
$(Q)$(TOUCH) $@ $(Q)$(TOUCH) $@
.PRECIOUS : $(CONFIG_LOCAL_HEADERS)
ifneq ($(CONFIG),) ifneq ($(CONFIG),)
$(foreach HEADER,$(CONFIG_HEADERS),config/local/$(CONFIG)/$(HEADER)) :
CONFIG_LOCAL_NAMED_HEADERS := $(foreach HEADER,$(CONFIG_HEADERS),\
config/local/$(CONFIG)/$(HEADER))
$(CONFIG_LOCAL_NAMED_HEADERS) :
$(Q)$(MKDIR) -p $(dir $@) $(Q)$(MKDIR) -p $(dir $@)
$(Q)$(TOUCH) $@ $(Q)$(TOUCH) $@
.PRECIOUS : $(CONFIG_LOCAL_NAMED_HEADERS)
endif endif
############################################################################### ###############################################################################