rules.mak

   1
   2 # Don't use implicit rules or variables
   3 # we have explicit rules for everything
   4 MAKEFLAGS += -rR
   5
   6 # Files with this suffixes are final, don't try to generate them
   7 # using implicit rules
   8 %.d:
   9 %.h:
  10 %.c:
  11 %.cc:
  12 %.cpp:
  13 %.m:
  14 %.mak:
  15
  16 # Flags for C++ compilation
  17 QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
  18
  19 # Flags for dependency generation
  20 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
  21
  22 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
  23 QEMU_INCLUDES += -I$(<D) -I$(@D)
  24
  25 maybe-add = $(filter-out $1, $2) $1
  26 extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs)) \
  27                   $(foreach o,$(call expand-objs,$1),$($o-libs))))
  28 expand-objs = $(strip $(sort $(filter %.o,$1)) \
  29                   $(foreach o,$(filter %.mo,$1),$($o-objs)) \
  30                   $(filter-out %.o %.mo,$1))
  31
  32 %.o: %.c
  33         $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
  34 %.o: %.rc
  35         $(call quiet-command,$(WINDRES) -I. -o $@ $<,"  RC    $(TARGET_DIR)$@")
  36
  37 # If we have a CXX we might have some C++ objects, in which case we
  38 # must link with the C++ compiler, not the plain C compiler.
  39 LINKPROG = $(or $(CXX),$(CC))
  40
  41 ifeq ($(LIBTOOL),)
  42 LINK = $(call quiet-command,$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  43        $(call expand-objs,$1) $(version-obj-y) \
  44        $(call extract-libs,$1) $(LIBS),"  LINK  $(TARGET_DIR)$@")
  45 else
  46 LIBTOOL += $(if $(V),,--quiet)
  47 %.lo: %.c
  48         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
  49 %.lo: %.rc
  50         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC   $(TARGET_DIR)$@")
  51 %.lo: %.dtrace
  52         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
  53
  54 LINK = $(call quiet-command,\
  55        $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
  56        )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  57        $(call expand-objs,$1) \
  58        $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
  59        $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
  60        $(call extract-libs,$1) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", "  LINK  ")"$(TARGET_DIR)$@")
  61 endif
  62
  63 %.asm: %.S
  64         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
  65
  66 %.o: %.asm
  67         $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
  68
  69 %.o: %.cc
  70         $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
  71
  72 %.o: %.cpp
  73         $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
  74
  75 %.o: %.m
  76         $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  77
  78 %.o: %.dtrace
  79         $(call quiet-command,dtrace -o $@ -G -s $<, "  GEN   $(TARGET_DIR)$@")
  80
  81 DSO_CFLAGS := -fPIC -DBUILD_DSO
  82 %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
  83 %$(DSOSUF): %.mo libqemustub.a
  84         $(call LINK,$^)
  85
  86 .PHONY: modules
  87 modules:
  88
  89 %$(EXESUF): %.o
  90         $(call LINK,$^)
  91
  92 %.a:
  93         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
  94
  95 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
  96
  97 # cc-option
  98 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
  99
 100 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
 101               >/dev/null 2>&1 && echo OK), $2, $3)
 102
 103 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
 104 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
 105
 106 # find-in-path
 107 # Usage: $(call find-in-path, prog)
 108 # Looks in the PATH if the argument contains no slash, else only considers one
 109 # specific directory.  Returns an # empty string if the program doesn't exist
 110 # there.
 111 find-in-path = $(if $(find-string /, $1), \
 112         $(wildcard $1), \
 113         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
 114
 115 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
 116 # Inputs to these must be either "y" (true) or "n" or "" (both false)
 117 # Output is always either "y" or "n".
 118 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
 119 # Logical NOT
 120 lnot = $(if $(subst n,,$1),n,y)
 121 # Logical AND
 122 land = $(if $(findstring yy,$1$2),y,n)
 123 # Logical OR
 124 lor = $(if $(findstring y,$1$2),y,n)
 125 # Logical XOR (note that this is the inverse of leqv)
 126 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
 127 # Logical equivalence (note that leqv "","n" is true)
 128 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
 129 # Logical if: like make's $(if) but with an leqv-like test
 130 lif = $(if $(subst n,,$1),$2,$3)
 131
 132 # String testing functions: inputs to these can be any string;
 133 # the output is always either "y" or "n". Leading and trailing whitespace
 134 # is ignored when comparing strings.
 135 # String equality
 136 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
 137 # String inequality
 138 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
 139 # Emptiness/non-emptiness tests:
 140 isempty = $(if $1,n,y)
 141 notempty = $(if $1,y,n)
 142
 143 # Generate files with tracetool
 144 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
 145
 146 # Generate timestamp files for .h include files
 147
 148 config-%.h: config-%.h-timestamp
 149         @cmp $< $@ >/dev/null 2>&1 || cp $< $@
 150
 151 config-%.h-timestamp: config-%.mak
 152         $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)config-$*.h")
 153
 154 .PHONY: clean-timestamp
 155 clean-timestamp:
 156         rm -f *.timestamp
 157 clean: clean-timestamp
 158
 159 # will delete the target of a rule if commands exit with a nonzero exit status
 160 .DELETE_ON_ERROR:
 161
 162 # magic to descend into other directories
 163
 164 define push-var
 165 $(eval save-$2-$1 = $(value $1))
 166 $(eval $1 :=)
 167 endef
 168
 169 define pop-var
 170 $(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1))))
 171 $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
 172 $(eval save-$2-$1 :=)
 173 endef
 174
 175 define fix-obj-vars
 176 $(foreach v,$($1), \
 177         $(if $($v-cflags), \
 178                 $(eval $2$v-cflags := $($v-cflags)) \
 179                 $(eval $v-cflags := )) \
 180         $(if $($v-libs), \
 181                 $(eval $2$v-libs := $($v-libs)) \
 182                 $(eval $v-libs := )) \
 183         $(if $($v-objs), \
 184                 $(eval $2$v-objs := $(addprefix $2,$($v-objs))) \
 185                 $(eval $v-objs := )))
 186 endef
 187
 188 define unnest-dir
 189 $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
 190 $(eval obj-parent-$1 := $(obj))
 191 $(eval obj := $(if $(obj),$(obj)/$1,$1))
 192 $(eval include $(SRC_PATH)/$1/Makefile.objs)
 193 $(foreach v,$(nested-vars),$(call fix-obj-vars,$v,$(if $(obj),$(obj)/)))
 194 $(eval obj := $(obj-parent-$1))
 195 $(eval obj-parent-$1 := )
 196 $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
 197 endef
 198
 199 define unnest-vars-1
 200 $(eval nested-dirs := $(filter-out \
 201     $(old-nested-dirs), \
 202     $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
 203 $(if $(nested-dirs),
 204   $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
 205   $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
 206   $(call unnest-vars-1))
 207 endef
 208
 209 define process-modules
 210 $(foreach o,$(filter %.o,$($1)),
 211         $(eval $(patsubst %.o,%.mo,$o): $o) \
 212         $(eval $(patsubst %.o,%.mo,$o)-objs := $o))
 213 $(foreach o,$(filter-out $(modules-m), $(patsubst %.o,%.mo,$($1))), \
 214     $(eval $o: $($o-objs))
 215     $(eval modules-objs-m += $($o-objs))
 216     $(eval modules-m += $o)
 217     $(eval $o:; $$(call quiet-command,touch $$@,"  GEN   $$(TARGET_DIR)$$@"))
 218     $(if $(CONFIG_MODULES),$(eval modules: $(patsubst %.mo,%$(DSOSUF),$o)))) \
 219 $(eval modules-objs-m := $(sort $(modules-objs-m)))
 220 $(foreach o,$(modules-objs-m), \
 221     $(if $(CONFIG_MODULES),$(eval $o-cflags := $(call maybe-add, $(DSO_CFLAGS), $($o-cflags)))))
 222 $(eval $(patsubst %-m,%-$(call lnot,$(CONFIG_MODULES)),$1) += $($1))
 223 endef
 224
 225 define unnest-vars
 226 $(eval obj := $1)
 227 $(eval nested-vars := $2)
 228 $(eval old-nested-dirs := )
 229 $(call unnest-vars-1)
 230 $(if $1,$(foreach v,$(nested-vars),$(eval \
 231         $v := $(addprefix $1/,$($v)))))
 232 $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
 233 $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
 234 $(foreach var,$(nested-vars), $(eval \
 235   -include $(addsuffix *.d, $(sort $(dir $($(var)))))))
 236 $(foreach v,$(filter %-m,$(nested-vars)), \
 237     $(call process-modules,$v))
 238 endef