X-Git-Url: https://repo.jachan.dev/qemu.git/blobdiff_plain/837a2e267f9c01cd9204d5b701712d6d26a5220e..54c54f8b56047d3c2420e1ae06a6a8890c220ac4:/rules.mak diff --git a/rules.mak b/rules.mak index 65a1b9695b..4551b9ea70 100644 --- a/rules.mak +++ b/rules.mak @@ -8,6 +8,7 @@ MAKEFLAGS += -rR %.d: %.h: %.c: +%.cc: %.cpp: %.m: %.mak: @@ -16,36 +17,71 @@ MAKEFLAGS += -rR 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 +QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d # Same as -I$(SRC_PATH) -I., but for the nested source/object directories QEMU_INCLUDES += -I$(/dev/null 2>&1 && echo OK), $2, $3) -VPATH_SUFFIXES = %.c %.h %.S %.cpp %.m %.mak %.texi %.sh %.rc +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 @@ -106,6 +169,17 @@ 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) $(SRC_PATH)/scripts/tracetool.py @@ -125,44 +199,175 @@ clean: clean-timestamp # will delete the target of a rule if commands exit with a nonzero exit status .DELETE_ON_ERROR: -# magic to descend into other directories - -obj := . -old-nested-dirs := - -define push-var -$(eval save-$2-$1 = $(value $1)) -$(eval $1 :=) +# 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 $v := )) endef -define pop-var -$(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 :=) +# 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) $($2-new-value)) endef -define unnest-dir -$(foreach var,$(nested-vars),$(call push-var,$(var),$1/)) -$(eval obj := $(obj)/$1) -$(eval include $(SRC_PATH)/$1/Makefile.objs) -$(eval obj := $(patsubst %/$1,%,$(obj))) -$(foreach var,$(nested-vars),$(call pop-var,$(var),$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 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)) +# 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: $(call unnest-vars, obj_prefix, vars) +# +# @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include +# ending '/'. +# +# @vars: the list of variable names to unnest. +# +# This macro will scan subdirectories's Makefile.objs, include them, to build +# up each variable listed in @vars. +# +# Per object and per module cflags and libs are saved with relative path fixed +# as well, those variables include -libs, -cflags and -objs. Items in -objs are +# also fixed to relative path against SRC_PATH plus the prefix @obj_prefix. +# +# All nested variables postfixed by -m in names are treated as DSO variables, +# and will be built as modules, if enabled. +# +# A simple example of the unnest: +# +# obj_prefix = .. +# vars = hot cold +# hot = fire.o sun.o season/ +# cold = snow.o water/ season/ +# +# Unnest through a faked source directory structure: +# +# SRC_PATH +# ├── water +# │ └── Makefile.objs──────────────────┐ +# │ │ hot += steam.o │ +# │ │ cold += ice.mo │ +# │ │ ice.mo-libs := -licemaker │ +# │ │ ice.mo-objs := ice1.o ice2.o │ +# │ └──────────────────────────────┘ +# │ +# └── season +# └── Makefile.objs──────┐ +# │ hot += summer.o │ +# │ cold += winter.o │ +# └──────────────────┘ +# +# In the end, the result will be: +# +# hot = ../fire.o ../sun.o ../season/summer.o +# cold = ../snow.o ../water/ice.mo ../season/winter.o +# ../water/ice.mo-libs = -licemaker +# ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o +# +# Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not +# included. +# define unnest-vars -$(call unnest-vars-1) -$(foreach var,$(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))))))) + # 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