1# We want the all target to be the implicit target (if no target is 2# given explicitly on the command line) so mention it first. 3all: 4 5# Sub-directory Makefile.local fragments can append to these variables 6# to have directory-specific cflags as necessary. 7 8extra_cflags := 9extra_cxxflags := 10 11# Get settings from the output of configure by running it to generate 12# Makefile.config if it doesn't exist yet. 13 14# If Makefile.config doesn't exist, then srcdir won't be 15# set. Conditionally set it (assuming a plain srcdir build) so that 16# the rule to generate Makefile.config can actually work. 17srcdir ?= . 18 19include Makefile.config 20 21# We make all targets depend on the Makefiles themselves. 22global_deps = Makefile Makefile.config Makefile.local \ 23 $(subdirs:%=%/Makefile) $(subdirs:%=%/Makefile.local) 24 25INCLUDE_MORE := yes 26ifneq ($(filter clean distclean dataclean, $(word 1, $(MAKECMDGOALS))),) 27CLEAN_GOAL := $(word 1, $(MAKECMDGOALS)) 28 29# If there are more goals following CLEAN_GOAL, run $(MAKE)s in parts. 30ifneq ($(word 2, $(MAKECMDGOALS)),) 31INCLUDE_MORE := no 32FOLLOWING_GOALS := $(wordlist 2, 99, $(MAKECMDGOALS)) 33 34.PHONY: $(FOLLOWING_GOALS) make_in_parts 35$(FOLLOWING_GOALS): 36 @true 37$(CLEAN_GOAL): make_in_parts 38make_in_parts: 39 $(MAKE) $(CLEAN_GOAL) 40 $(MAKE) $(FOLLOWING_GOALS) configure_options="$(configure_options)" 41endif 42 43else 44CLEAN_GOAL := 45endif 46 47# Potentially speedup make clean, distclean and dataclean ; avoid 48# re-creating Makefile.config if it exists but configure is newer. 49ifneq ($(CLEAN_GOAL),) 50Makefile.config: | $(srcdir)/configure 51else 52Makefile.config: $(srcdir)/configure 53endif 54ifeq ($(configure_options),) 55 @echo "" 56 @echo "Note: Calling ./configure with no command-line arguments. This is often fine," 57 @echo " but if you want to specify any arguments (such as an alternate prefix" 58 @echo " into which to install), call ./configure explicitly and then make again." 59 @echo " See \"./configure --help\" for more details." 60 @echo "" 61endif 62 $(srcdir)/configure $(configure_options) 63 64ifeq ($(INCLUDE_MORE),yes) 65# runtime variable definitions available in all subdirs 66include $(srcdir)/Makefile.global 67# Finally, include all of the Makefile.local fragments where all the 68# real work is done. 69 70include $(subdirs:%=%/Makefile.local) Makefile.local 71endif 72