3690019da8
So only rebuild when a makefile changes (which presumably defines the file list somewhere), and only touch the file if an object changed. The touch is necessary so the parent make knows something changed and ultimately rebuilds postgres.
51 lines
1.4 KiB
Makefile
51 lines
1.4 KiB
Makefile
#
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# Common make rules for backend
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#
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# $PostgreSQL: pgsql/src/backend/common.mk,v 1.3 2008/02/26 07:20:38 petere Exp $
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#
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# When including this file, set OBJS to the object files created in
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# this directory and SUBDIRS to subdirectories containing more things
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# to build.
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ifdef PARTIAL_LINKING
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# old style: linking using SUBSYS.o
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subsysfilename = SUBSYS.o
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else
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# new style: linking all object files at once
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subsysfilename = objfiles.txt
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endif
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SUBDIROBJS = $(SUBDIRS:%=%/$(subsysfilename))
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# top-level backend directory obviously has its own "all" target
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ifneq ($(subdir), src/backend)
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all: $(subsysfilename)
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endif
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SUBSYS.o: $(SUBDIROBJS) $(OBJS)
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$(LD) $(LDREL) $(LDOUT) $@ $^
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objfiles.txt:: $(MAKEFILE_LIST)
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( $(if $(SUBDIROBJS),cat $(SUBDIROBJS); )echo $(addprefix $(subdir)/,$(OBJS)) ) >$@
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objfiles.txt:: $(SUBDIROBJS) $(OBJS)
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touch $@
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# make function to expand objfiles.txt contents
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expand_subsys = $(foreach file,$(filter %/objfiles.txt,$(1)),$(patsubst ../../src/backend/%,%,$(addprefix $(top_builddir)/,$(shell cat $(file))))) $(filter-out %/objfiles.txt,$(1))
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# Parallel make trickery
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$(SUBDIROBJS): $(SUBDIRS:%=%-recursive) ;
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.PHONY: $(SUBDIRS:%=%-recursive)
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$(SUBDIRS:%=%-recursive):
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$(MAKE) -C $(subst -recursive,,$@) all
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clean: clean-local
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clean-local:
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ifdef SUBDIRS
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for dir in $(SUBDIRS); do $(MAKE) -C $$dir clean || exit; done
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endif
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rm -f $(subsysfilename) $(OBJS)
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