linux/tools/scripts/Makefile.include
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   1ifneq ($(O),)
   2ifeq ($(origin O), command line)
   3        dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
   4        ABSOLUTE_O := $(shell cd $(O) ; pwd)
   5        OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
   6        COMMAND_O := O=$(ABSOLUTE_O)
   7ifeq ($(objtree),)
   8        objtree := $(O)
   9endif
  10endif
  11endif
  12
  13# check that the output directory actually exists
  14ifneq ($(OUTPUT),)
  15OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
  16$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
  17endif
  18
  19#
  20# Include saner warnings here, which can catch bugs:
  21#
  22EXTRA_WARNINGS := -Wbad-function-cast
  23EXTRA_WARNINGS += -Wdeclaration-after-statement
  24EXTRA_WARNINGS += -Wformat-security
  25EXTRA_WARNINGS += -Wformat-y2k
  26EXTRA_WARNINGS += -Winit-self
  27EXTRA_WARNINGS += -Wmissing-declarations
  28EXTRA_WARNINGS += -Wmissing-prototypes
  29EXTRA_WARNINGS += -Wnested-externs
  30EXTRA_WARNINGS += -Wno-system-headers
  31EXTRA_WARNINGS += -Wold-style-definition
  32EXTRA_WARNINGS += -Wpacked
  33EXTRA_WARNINGS += -Wredundant-decls
  34EXTRA_WARNINGS += -Wshadow
  35EXTRA_WARNINGS += -Wstrict-aliasing=3
  36EXTRA_WARNINGS += -Wstrict-prototypes
  37EXTRA_WARNINGS += -Wswitch-default
  38EXTRA_WARNINGS += -Wswitch-enum
  39EXTRA_WARNINGS += -Wundef
  40EXTRA_WARNINGS += -Wwrite-strings
  41EXTRA_WARNINGS += -Wformat
  42
  43ifneq ($(findstring $(MAKEFLAGS), w),w)
  44PRINT_DIR = --no-print-directory
  45else
  46NO_SUBDIR = :
  47endif
  48
  49#
  50# Define a callable command for descending to a new directory
  51#
  52# Call by doing: $(call descend,directory[,target])
  53#
  54descend = \
  55        +mkdir -p $(OUTPUT)$(1) && \
  56        $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
  57
  58QUIET_SUBDIR0  = +$(MAKE) $(COMMAND_O) -C # space to separate -C and subdir
  59QUIET_SUBDIR1  =
  60
  61ifneq ($(findstring $(MAKEFLAGS),s),s)
  62ifneq ($(V),1)
  63        QUIET_CC       = @echo '   ' CC $@;
  64        QUIET_AR       = @echo '   ' AR $@;
  65        QUIET_LINK     = @echo '   ' LINK $@;
  66        QUIET_MKDIR    = @echo '   ' MKDIR $@;
  67        QUIET_GEN      = @echo '   ' GEN $@;
  68        QUIET_SUBDIR0  = +@subdir=
  69        QUIET_SUBDIR1  = ;$(NO_SUBDIR) echo '   ' SUBDIR $$subdir; \
  70                         $(MAKE) $(PRINT_DIR) -C $$subdir
  71        QUIET_FLEX     = @echo '   ' FLEX $@;
  72        QUIET_BISON    = @echo '   ' BISON $@;
  73
  74        descend = \
  75                +@echo '   ' DESCEND $(1); \
  76                mkdir -p $(OUTPUT)$(1) && \
  77                $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
  78endif
  79endif
  80
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