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