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Diffstat (limited to 'src/rules.mak')
| -rw-r--r-- | src/rules.mak | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/src/rules.mak b/src/rules.mak new file mode 100644 index 0000000..4551b9e --- /dev/null +++ b/src/rules.mak @@ -0,0 +1,373 @@ + +# Don't use implicit rules or variables +# we have explicit rules for everything +MAKEFLAGS += -rR + +# Files with this suffixes are final, don't try to generate them +# using implicit rules +%.d: +%.h: +%.c: +%.cc: +%.cpp: +%.m: +%.mak: + +# Flags for C++ compilation +QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS)) + +# Flags for dependency generation +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) + +WL_U := -Wl,-u, +find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2))) +defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}') +undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}') + +# All the .mo objects in -m variables are also added into corresponding -y +# variable in unnest-vars, but filtered out here, when LINK is called. +# +# The .mo objects are supposed to be linked as a DSO, for module build. So here +# they are only used as a placeholders to generate those "archive undefined" +# symbol options (-Wl,-u,$symbol_name), which are the archive functions +# referenced by the code in the DSO. +# +# Also the presence in -y variables will also guarantee they are built before +# linking executables that will load them. So we can look up symbol reference +# in LINK. +# +# This is necessary because the exectuable itself may not use the function, in +# which case the function would not be linked in. Then the DSO loading will +# fail because of the missing symbol. +process-archive-undefs = $(filter-out %.a %.mo,$1) \ + $(addprefix $(WL_U), \ + $(filter $(call defined-symbols,$(filter %.a, $1)), \ + $(call undefined-symbols,$(filter %.mo,$1)))) \ + $(filter %.a,$1) + +extract-libs = $(strip $(foreach o,$1,$($o-libs))) +expand-objs = $(strip $(sort $(filter %.o,$1)) \ + $(foreach o,$(filter %.mo,$1),$($o-objs)) \ + $(filter-out %.o %.mo,$1)) + +%.o: %.c + $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CC $(TARGET_DIR)$@") +%.o: %.rc + $(call quiet-command,$(WINDRES) -I. -o $@ $<," RC $(TARGET_DIR)$@") + +# If we have a CXX we might have some C++ objects, in which case we +# must link with the C++ compiler, not the plain C compiler. +LINKPROG = $(or $(CXX),$(CC)) + +ifeq ($(LIBTOOL),) +LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ + $(call process-archive-undefs, $1) \ + $(version-obj-y) $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@") +else +LIBTOOL += $(if $(V),,--quiet) +%.lo: %.c + $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($*.o-cflags) -c -o $@ $<," lt CC $@") +%.lo: %.rc + $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC $(TARGET_DIR)$@") +%.lo: %.dtrace + $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@") + +LINK = $(call quiet-command,\ + $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \ + )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ + $(call process-archive-undefs, $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)$@") +endif + +%.asm: %.S + $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@") + +%.o: %.asm + $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS $(TARGET_DIR)$@") + +%.o: %.cc + $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@") + +%.o: %.cpp + $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@") + +%.o: %.m + $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," OBJC $(TARGET_DIR)$@") + +%.o: %.dtrace + $(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@") + +DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO +module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS) +%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED) +%$(DSOSUF): %.mo + $(call LINK,$^) + @# Copy to build root so modules can be loaded when program started without install + $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)")) + + +LD_REL := $(CC) -nostdlib -Wl,-r + +%.mo: + $(call quiet-command,$(LD_REL) -o $@ $^," LD -r $(TARGET_DIR)$@") + +.PHONY: modules +modules: + +%$(EXESUF): %.o + $(call LINK,$^) + +%.a: + $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@") + +quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1)) + +# cc-option +# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0) + +cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \ + >/dev/null 2>&1 && echo OK), $2, $3) + +VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc +set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1))) + +# install-prog list, dir +define install-prog + $(INSTALL_DIR) "$2" + $(INSTALL_PROG) $1 "$2" + $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),) +endef + +# find-in-path +# Usage: $(call find-in-path, prog) +# Looks in the PATH if the argument contains no slash, else only considers one +# specific directory. Returns an # empty string if the program doesn't exist +# there. +find-in-path = $(if $(find-string /, $1), \ + $(wildcard $1), \ + $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH))))) + +# Logical functions (for operating on y/n values like CONFIG_FOO vars) +# Inputs to these must be either "y" (true) or "n" or "" (both false) +# Output is always either "y" or "n". +# Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR)) +# Logical NOT +lnot = $(if $(subst n,,$1),n,y) +# Logical AND +land = $(if $(findstring yy,$1$2),y,n) +# Logical OR +lor = $(if $(findstring y,$1$2),y,n) +# Logical XOR (note that this is the inverse of leqv) +lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y) +# Logical equivalence (note that leqv "","n" is true) +leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n) +# Logical if: like make's $(if) but with an leqv-like test +lif = $(if $(subst n,,$1),$2,$3) + +# String testing functions: inputs to these can be any string; +# the output is always either "y" or "n". Leading and trailing whitespace +# is ignored when comparing strings. +# String equality +eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y) +# String inequality +ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n) +# Emptiness/non-emptiness tests: +isempty = $(if $1,n,y) +notempty = $(if $1,y,n) + +# Generate files with tracetool +TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py + +# Generate timestamp files for .h include files + +config-%.h: config-%.h-timestamp + @cmp $< $@ >/dev/null 2>&1 || cp $< $@ + +config-%.h-timestamp: config-%.mak + $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)config-$*.h") + +.PHONY: clean-timestamp +clean-timestamp: + rm -f *.timestamp +clean: clean-timestamp + +# will delete the target of a rule if commands exit with a nonzero exit status +.DELETE_ON_ERROR: + +# 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 + +# 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 + +# 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 + +# 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 + # 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) + # Pass the .mo-cflags and .mo-libs along to its member objects + $(foreach o, $(filter %.mo,$($v)), + $(foreach p,$($o-objs), + $(if $($o-cflags), $(eval $p-cflags += $($o-cflags))) + $(if $($o-libs), $(eval $p-libs += $($o-libs)))))) + + # For all %.mo objects that are directly added into -y, just expand them + $(foreach v,$(filter %-y,$2), + $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o)))) + + $(foreach v,$(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), + $(foreach o,$($v), + $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS)) + $(eval $o: $($o-objs))) + $(eval $(patsubst %-m,%-y,$v) += $($v)) + $(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))) + $(shell mkdir -p ./ $(sort $(dir $($v)))) + # Include all the .d files + $(eval -include $(patsubst %.o,%.d,$(patsubst %.mo,%.d,$($v)))) + $(eval $v := $(filter-out %/,$($v)))) +endef |
