On 15.09.2010 6:44, Lynn Lin wrote:
Hi all,
Our build command
$(QUIET_CPP)$(CPP) $(CPPFLAGS) $(CXXFLAGS) $(INCLUDES) -c $<
when CPPFLAGS change,how can we enable make rebuild?
OMake build tools (it development stop now) work in that manner:
http://omake.metaprl.org/index.html
For GNU Make there 2 possibility:
1) You change variable assignment in original or included Makefiles.
Add such dependence:
%.c: $(MAKEFILE_LIST)
...
2) You change variable by 'make' invoking or by changing env var.
For this case I use such trick:
# Makefile itself.
MK_FILE := $(firstword $(MAKEFILE_LIST))
# Storage for CLI options.
MK_CLI_FILE := $(MK_FILE).cli
-include $(MK_CLI_FILE)
$(shell mkdir -p $(dir $(MK_CLI_FILE)); printf
"DEBUG_OLD=$(DEBUG)\nOPT_LEVEL_OLD=$(OPT_LEVEL)\n" >$(MK_CLI_FILE))
ifneq '$(DEBUG_OLD)' '$(DEBUG)'
$(shell touch $(MK_FILE))
endif
ifneq '$(OPT_LEVEL_OLD)' '$(OPT_LEVEL)'
$(shell touch $(MK_FILE))
endif
and adds a lot of:
%.c: $(MK_FILE)
%.cxx: $(MK_FILE)
%.sh: $(MK_FILE)
--
С уважением, Александр Гавенко.
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