rules.mak

   1
   2 # These are used when we want to do substitutions without confusing Make
   3 NULL  :=
   4 SPACE := $(NULL) #
   5 COMMA := ,
   6
   7 # Don't use implicit rules or variables
   8 # we have explicit rules for everything
   9 MAKEFLAGS += -rR
  10
  11 # Files with this suffixes are final, don't try to generate them
  12 # using implicit rules
  13 %/trace-events:
  14 %.hx:
  15 %.py:
  16 %.objs:
  17 %.d:
  18 %.h:
  19 %.c:
  20 %.cc:
  21 %.cpp:
  22 %.m:
  23 %.mak:
  24
  25 # Flags for dependency generation
  26 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
  27
  28 # Compiler searches the source file dir first, but in vpath builds
  29 # we need to make it search the build dir too, before any other
  30 # explicit search paths. There are two search locations in the build
  31 # dir, one absolute and the other relative to the compiler working
  32 # directory. These are the same for target-independent files, but
  33 # different for target-dependent ones.
  34 QEMU_LOCAL_INCLUDES = -iquote $(BUILD_DIR) -iquote $(BUILD_DIR)/$(@D) -iquote $(@D)
  35
  36 WL := -Wl,
  37 ifdef CONFIG_DARWIN
  38 whole-archive = $(WL)-force_load,$1
  39 else
  40 whole-archive = $(WL)--whole-archive $1 $(WL)--no-whole-archive
  41 endif
  42
  43 extract-libs = $(strip $(foreach o,$1,$($o-libs)))
  44
  45 %.o: %.c
  46         @mkdir -p $(dir $@)
  47         $(call quiet-command,$(CC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  48                $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
  49                -c -o $@ $<,"CC","$(TARGET_DIR)$@")
  50
  51 # If we have a CXX we might have some C++ objects, in which case we
  52 # must link with the C++ compiler, not the plain C compiler.
  53 LINKPROG = $(or $(CXX),$(CC))
  54
  55 LINK = $(call quiet-command, $(LINKPROG) $(CFLAGS) $(QEMU_LDFLAGS) -o $@ \
  56        $(filter-out %.a %.fa,$1) \
  57        $(foreach l,$(filter %.fa,$1),$(call whole-archive,$l)) \
  58        $(filter %.a,$1) \
  59        $(call extract-libs,$1) $(LIBS),"LINK","$(TARGET_DIR)$@")
  60
  61 %.o: %.S
  62         $(call quiet-command,$(CCAS) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  63                $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
  64                -c -o $@ $<,"CCAS","$(TARGET_DIR)$@")
  65
  66 %.o: %.cc
  67         $(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  68                $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CXXFLAGS) $($@-cflags) \
  69                -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
  70
  71 %.o: %.cpp
  72         $(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  73                $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CXXFLAGS) $($@-cflags) \
  74                -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
  75
  76 %.o: %.m
  77         $(call quiet-command,$(OBJCC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  78                $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
  79                -c -o $@ $<,"OBJC","$(TARGET_DIR)$@")
  80
  81 %.o: %.dtrace
  82         $(call quiet-command,dtrace -o $@ -G -s $<,"GEN","$(TARGET_DIR)$@")
  83
  84 .PHONY: modules
  85 modules:
  86
  87 %$(EXESUF): %.o
  88         $(call LINK,$(filter %.o %.a %.fa, $^))
  89
  90 %.a:
  91         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"AR","$(TARGET_DIR)$@")
  92
  93 # Usage: $(call quiet-command,command and args,"NAME","args to print")
  94 # This will run "command and args", and either:
  95 #  if V=1 just print the whole command and args
  96 #  otherwise print the 'quiet' output in the format "  NAME     args to print"
  97 # NAME should be a short name of the command, 7 letters or fewer.
  98 # If called with only a single argument, will print nothing in quiet mode.
  99 quiet-command-run = $(if $(V),,$(if $2,printf "  %-7s %s\n" $2 $3 && ))$1
 100 quiet-@ = $(if $(V),,@)
 101 quiet-command = $(quiet-@)$(call quiet-command-run,$1,$2,$3)
 102
 103 # cc-option
 104 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
 105
 106 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
 107               >/dev/null 2>&1 && echo OK), $2, $3)
 108 cc-c-option = $(if $(shell $(CC) $1 $2 -c -o /dev/null -xc /dev/null \
 109                 >/dev/null 2>&1 && echo OK), $2, $3)
 110
 111 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc Kconfig% %.json.in
 112 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
 113
 114 # install-prog list, dir
 115 define install-prog
 116         $(INSTALL_DIR) "$2"
 117         $(INSTALL_PROG) $1 "$2"
 118         $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
 119 endef
 120
 121 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
 122 # Inputs to these must be either "y" (true) or "n" or "" (both false)
 123 # Output is always either "y" or "n".
 124 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
 125 # Logical NOT
 126 lnot = $(if $(subst n,,$1),n,y)
 127 # Logical AND
 128 land = $(if $(findstring yy,$1$2),y,n)
 129 # Logical OR
 130 lor = $(if $(findstring y,$1$2),y,n)
 131 # Logical XOR (note that this is the inverse of leqv)
 132 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
 133 # Logical equivalence (note that leqv "","n" is true)
 134 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
 135 # Logical if: like make's $(if) but with an leqv-like test
 136 lif = $(if $(subst n,,$1),$2,$3)
 137
 138 # String testing functions: inputs to these can be any string;
 139 # the output is always either "y" or "n". Leading and trailing whitespace
 140 # is ignored when comparing strings.
 141 # String equality
 142 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
 143 # String inequality
 144 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
 145 # Emptiness/non-emptiness tests:
 146 isempty = $(if $1,n,y)
 147 notempty = $(if $1,y,n)
 148
 149 .PHONY: clean-timestamp
 150 clean-timestamp:
 151         rm -f *.timestamp
 152 clean: clean-timestamp
 153
 154 # will delete the target of a rule if commands exit with a nonzero exit status
 155 .DELETE_ON_ERROR:
 156
 157 print-%:
 158         @echo '$*=$($*)'