diff options
| -rw-r--r-- | rules.mak | 237 |
1 files changed, 158 insertions, 79 deletions
@@ -22,9 +22,7 @@ QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d # Same as -I$(SRC_PATH) -I., but for the nested source/object directories QEMU_INCLUDES += -I$(<D) -I$(@D) -maybe-add = $(filter-out $1, $2) $1 -extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs))) \ - $(foreach o,$(call expand-objs,$1),$($o-libs))) +extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs)))) expand-objs = $(strip $(sort $(filter %.o,$1)) \ $(foreach o,$(filter %.mo,$1),$($o-objs)) \ $(filter-out %.o %.mo,$1)) @@ -39,9 +37,8 @@ expand-objs = $(strip $(sort $(filter %.o,$1)) \ LINKPROG = $(or $(CXX),$(CC)) ifeq ($(LIBTOOL),) -LINK = $(call quiet-command,$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ - $(call expand-objs,$1) $(version-obj-y) \ - $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@") +LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ + $1 $(version-obj-y) $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@") else LIBTOOL += $(if $(V),,--quiet) %.lo: %.c @@ -53,8 +50,7 @@ LIBTOOL += $(if $(V),,--quiet) LINK = $(call quiet-command,\ $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \ - )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ - $(call expand-objs,$1) \ + )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $1 \ $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \ $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \ $(call extract-libs,$(1:.lo=.o)) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", " LINK ")"$(TARGET_DIR)$@") @@ -78,9 +74,9 @@ endif %.o: %.dtrace $(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@") -DSO_CFLAGS := -fPIC -DBUILD_DSO +%$(DSOSUF): CFLAGS += -fPIC -DBUILD_DSO %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED) -%$(DSOSUF): %.mo libqemustub.a +%$(DSOSUF): $(call LINK,$^) @# Copy to build root so modules can be loaded when program started without install $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)")) @@ -161,82 +157,165 @@ clean: clean-timestamp # will delete the target of a rule if commands exit with a nonzero exit status .DELETE_ON_ERROR: -# magic to descend into other directories - -define push-var -$(eval save-$2-$1 = $(value $1)) -$(eval $1 :=) -endef - -define pop-var -$(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1)))) -$(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1)) -$(eval save-$2-$1 :=) -endef - -define fix-obj-vars -$(if $2, $(foreach v,$($1), \ - $(if $($v-cflags), \ - $(eval $2/$v-cflags := $($v-cflags)) \ - $(eval $v-cflags := )) \ - $(if $($v-libs), \ - $(eval $2/$v-libs := $($v-libs)) \ - $(eval $v-libs := )) \ - $(if $($v-objs), \ - $(eval $2/$v-objs := $(addprefix $2/,$($v-objs))) \ - $(eval $v-objs := )))) +# save-vars +# Usage: $(call save-vars, vars) +# Save each variable $v in $vars as save-vars-$v, save their object's +# variables, then clear $v. +define save-vars + $(foreach v,$1, + $(eval save-vars-$v := $(value $v)) + $(foreach o,$($v), + $(foreach k,cflags libs objs, + $(if $($o-$k), + $(eval save-vars-$o-$k := $($o-$k)) + $(eval $o-$k := )))) + $(eval $v := )) endef -define unnest-dir -$(foreach var,$(nested-vars),$(call push-var,$(var),$1/)) -$(eval obj-parent-$1 := $(obj)) -$(eval obj := $(if $(obj),$(obj)/$1,$1)) -$(eval include $(SRC_PATH)/$1/Makefile.objs) -$(foreach v,$(nested-vars),$(call fix-obj-vars,$v,$(obj))) -$(eval obj := $(obj-parent-$1)) -$(eval obj-parent-$1 := ) -$(foreach var,$(nested-vars),$(call pop-var,$(var),$1/)) +# load-vars +# Usage: $(call load-vars, vars, add_var) +# Load the saved value for each variable in @vars, and the per object +# variables. +# Append @add_var's current value to the loaded value. +define load-vars + $(eval $2-new-value := $(value $2)) + $(foreach v,$1, + $(eval $v := $(value save-vars-$v)) + $(foreach o,$($v), + $(foreach k,cflags libs objs, + $(if $(save-vars-$o-$k), + $(eval $o-$k := $(save-vars-$o-$k)) + $(eval save-vars-$o-$k := )))) + $(eval save-vars-$v := )) + $(eval $2 := $(value $2) $($2-new-value)) endef -define unnest-vars-1 -$(eval nested-dirs := $(filter-out \ - $(old-nested-dirs), \ - $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var))))))) -$(if $(nested-dirs), - $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir)))) - $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs)) - $(call unnest-vars-1)) +# fix-paths +# Usage: $(call fix-paths, obj_path, src_path, vars) +# Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all +# directories in @vars. +define fix-paths + $(foreach v,$3, + $(foreach o,$($v), + $(if $($o-libs), + $(eval $1$o-libs := $($o-libs))) + $(if $($o-cflags), + $(eval $1$o-cflags := $($o-cflags))) + $(if $($o-objs), + $(eval $1$o-objs := $(addprefix $1,$($o-objs))))) + $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \ + $(addprefix $2,$(filter %/,$($v))))) endef -define process-modules -$(foreach o,$(filter %.o,$($1)), - $(eval $(patsubst %.o,%.mo,$o): $o) \ - $(eval $(patsubst %.o,%.mo,$o)-objs := $o)) -$(foreach o,$(filter-out $(modules-m), $(patsubst %.o,%.mo,$($1))), \ - $(eval $o-objs += module-common.o) - $(eval $o: $($o-objs)) - $(eval modules-objs-m += $($o-objs)) - $(eval modules-m += $o) - $(eval $o:; $$(call quiet-command,touch $$@," GEN $$(TARGET_DIR)$$@")) - $(if $(CONFIG_MODULES),$(eval modules: $(patsubst %.mo,%$(DSOSUF),$o)))) \ -$(eval modules-objs-m := $(sort $(modules-objs-m))) -$(foreach o,$(modules-objs-m), \ - $(if $(CONFIG_MODULES),$(eval $o-cflags := $(call maybe-add, $(DSO_CFLAGS), $($o-cflags))))) -$(eval $(patsubst %-m,%-$(call lnot,$(CONFIG_MODULES)),$1) += $($1)) +# unnest-var-recursive +# Usage: $(call unnest-var-recursive, obj_prefix, vars, var) +# +# Unnest @var by including subdir Makefile.objs, while protect others in @vars +# unchanged. +# +# @obj_prefix is the starting point of object path prefix. +# +define unnest-var-recursive + $(eval dirs := $(sort $(filter %/,$($3)))) + $(eval $3 := $(filter-out %/,$($3))) + $(foreach d,$(dirs:%/=%), + $(call save-vars,$2) + $(eval obj := $(if $1,$1/)$d) + $(eval -include $(SRC_PATH)/$d/Makefile.objs) + $(call fix-paths,$(if $1,$1/)$d/,$d/,$2) + $(call load-vars,$2,$3) + $(call unnest-var-recursive,$1,$2,$3)) endef +# unnest-vars +# Usage: $(call unnest-vars, obj_prefix, vars) +# +# @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include +# ending '/'. +# +# @vars: the list of variable names to unnest. +# +# This macro will scan subdirectories's Makefile.objs, include them, to build +# up each variable listed in @vars. +# +# Per object and per module cflags and libs are saved with relative path fixed +# as well, those variables include -libs, -cflags and -objs. Items in -objs are +# also fixed to relative path against SRC_PATH plus the prefix @obj_prefix. +# +# All nested variables postfixed by -m in names are treated as DSO variables, +# and will be built as modules, if enabled. +# +# A simple example of the unnest: +# +# obj_prefix = .. +# vars = hot cold +# hot = fire.o sun.o season/ +# cold = snow.o water/ season/ +# +# Unnest through a faked source directory structure: +# +# SRC_PATH +# ├── water +# │ └── Makefile.objs──────────────────┐ +# │ │ hot += steam.o │ +# │ │ cold += ice.mo │ +# │ │ ice.mo-libs := -licemaker │ +# │ │ ice.mo-objs := ice1.o ice2.o │ +# │ └──────────────────────────────┘ +# │ +# └── season +# └── Makefile.objs──────┐ +# │ hot += summer.o │ +# │ cold += winter.o │ +# └──────────────────┘ +# +# In the end, the result will be: +# +# hot = ../fire.o ../sun.o ../season/summer.o +# cold = ../snow.o ../water/ice.mo ../season/winter.o +# ../water/ice.mo-libs = -licemaker +# ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o +# +# Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not +# included. +# define unnest-vars -$(eval obj := $1) -$(eval nested-vars := $2) -$(foreach v,$(nested-vars),$(call fix-obj-vars,$v,$(obj))) -$(eval old-nested-dirs := ) -$(call unnest-vars-1) -$(if $1,$(foreach v,$(nested-vars),$(eval \ - $v := $(addprefix $1/,$($v))))) -$(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var))))) -$(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var)))))) -$(foreach var,$(nested-vars), $(eval \ - -include $(addsuffix *.d, $(sort $(dir $($(var))))))) -$(foreach v,$(filter %-m,$(nested-vars)), \ - $(call process-modules,$v)) + # In the case of target build (i.e. $1 == ..), fix path for top level + # Makefile.objs objects + $(if $1,$(call fix-paths,$1/,,$2)) + + # Descend and include every subdir Makefile.objs + $(foreach v, $2, $(call unnest-var-recursive,$1,$2,$v)) + + $(foreach v,$(filter %-m,$2), + # All .o found in *-m variables are single object modules, create .mo + # for them + $(foreach o,$(filter %.o,$($v)), + $(eval $(o:%.o=%.mo)-objs := $o)) + # Now unify .o in -m variable to .mo + $(eval $v := $($v:%.o=%.mo)) + $(eval modules-m += $($v)) + + # For module build, build shared libraries during "make modules" + # For non-module build, add -m to -y + $(if $(CONFIG_MODULES), + $(eval modules: $($v:%.mo=%$(DSOSUF))), + $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v))))) + + # Post-process all the unnested vars + $(foreach v,$2, + $(foreach o, $(filter %.mo,$($v)), + # Find all the .mo objects in variables and add dependency rules + # according to .mo-objs. Report error if not set + $(if $($o-objs), + $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)), + $(error $o added in $v but $o-objs is not set)) + # Pass the .mo-cflags and .mo-libs along to member objects + $(foreach p,$($o-objs), + $(if $($o-cflags), $(eval $p-cflags += $($o-cflags))) + $(if $($o-libs), $(eval $p-libs += $($o-libs))))) + $(shell mkdir -p ./ $(sort $(dir $($v)))) + # Include all the .d files + $(eval -include $(addsuffix *.d, $(sort $(dir $($v))))) + $(eval $v := $(filter-out %/,$($v)))) endef |