Messages in this thread | | | Date | Mon, 15 Jan 2007 10:35:25 +0100 | From | "Pelle Svensson" <> | Subject | Skeleton, Makefile extension - Separate source tree with only valid source files |
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Did some hacks to the Makefile which might be of interest for those who feel like there are too many source files in the Linux tree. Running following make will create a separate directory including only the files which are active i.e. they are include in the final build configuration.
source = /home/john/src/linux-2.6.20 build_dir = /home/john/src/linux-2.6.20-build edit_dir = /home/john/src/linux-2.6.20-edit
cd $(source) make O=$(build_dir) ACTIVE_SRC=$(edit_dir) active_srctree
Links will be create in $(edit_dir) and what ever IDE that are in use for editing should target the $(edit_dir). The good thing is that grep will only hit valid files not 50 other files which are not in my interest.
Due to lack of time this is not complete. Phrasing the dependency need to be added for all the include files.
Part added to root Makefile ==================
# Generate source tree with only active files based on the configuration # ---------------------------------------------------------------------------
ifneq ($(ACTIVE_SRCTREE),) edittree := $(ACTIVE_SRCTREE) edittree-alldir := $(subst usr,,$(vmlinux-alldirs)) edittree-alldir := $(addprefix $(edittree)/, $(edittree-alldir) ) endif
PHONY += active_srctree validate_active_srctree $(edittree-alldir)
validate_active_srctree: $(if $(ACTIVE_SRCTREE),, $(error Must define ACTIVE_SRCTREE=...)) $(edittree-alldir): $(Q) $(MAKE) -f $(srctree)/scripts/Makefile.srctree edittree=$(edittree) srctree=$(srctree) dst=$@
active_srctree: validate_active_srctree $(edittree-alldir)
New file created scripts/Makefile.srctree ============================
# ========================================================================== # Building a source tree consisting of links into main source. # Links are only created for files currently in use by the configuration # ==========================================================================
#src := $(src) sdir := $(subst $(edittree)/,,$(dst)) sdir := $(subst %/,%,$(sdir))
PHONY := link link:
# Read .config if it exist, otherwise ignore -include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/$(sdir)/Makefile
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) subdir-y += $(__subdir-y) __subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) subdir-m += $(__subdir-m)
subdir-ym := $(sort $(subdir-y) $(subdir-m)) subdir-ym := $(addprefix $(sdir)/, $(subdir-ym))
obj-y := $(filter-out %/, $(obj-y)) obj-m := $(filter-out %/, $(obj-m))
obj-names := $(patsubst %.o,%,$(obj-y) $(obj-m) $(head-y)) obj-names := $(filter-out /% , $(obj-names)) src-files := $(addprefix $(srctree)/$(sdir)/, $(obj-names)) src-files := $(wildcard $(addsuffix .*, $(src-files))) dst-files := $(subst $(srctree)/,,$(src-files)) dst-files := $(addprefix $(edittree)/, $(dst-files))
link: $(dst-files) $(subdir-ym)
$(dst-files): $(edittree)/%: $(srctree)/% $(Q) mkdir -p $(@D) $(Q) if test -f $@; then touch $@; else cp -l $< $@; fi
# Descending # ---------------------------------------------------------------------------
PHONY += $(subdir-ym) $(subdir-ym): $(Q) $(MAKE) -f $(srctree)/scripts/Makefile.srctree edittree=$(edittree) srctree=$(srctree) dst=$@
# ---------------------------------------------------------------------------
.PHONY: $(PHONY)
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