tools/scripts/Makefile.include

   1 ifneq ($(O),)
   2 ifeq ($(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=$(ABSOLUTE_O)
   7 ifeq ($(objtree),)
   8         objtree := $(O)
   9 endif
  10 endif
  11 endif
  12
  13 # check that the output directory actually exists
  14 ifneq ($(OUTPUT),)
  15 OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
  16 $(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
  17 endif
  18
  19 #
  20 # Include saner warnings here, which can catch bugs:
  21 #
  22 EXTRA_WARNINGS := -Wbad-function-cast
  23 EXTRA_WARNINGS += -Wdeclaration-after-statement
  24 EXTRA_WARNINGS += -Wformat-security
  25 EXTRA_WARNINGS += -Wformat-y2k
  26 EXTRA_WARNINGS += -Winit-self
  27 EXTRA_WARNINGS += -Wmissing-declarations
  28 EXTRA_WARNINGS += -Wmissing-prototypes
  29 EXTRA_WARNINGS += -Wnested-externs
  30 EXTRA_WARNINGS += -Wno-system-headers
  31 EXTRA_WARNINGS += -Wold-style-definition
  32 EXTRA_WARNINGS += -Wpacked
  33 EXTRA_WARNINGS += -Wredundant-decls
  34 EXTRA_WARNINGS += -Wshadow
  35 EXTRA_WARNINGS += -Wstrict-prototypes
  36 EXTRA_WARNINGS += -Wswitch-default
  37 EXTRA_WARNINGS += -Wswitch-enum
  38 EXTRA_WARNINGS += -Wundef
  39 EXTRA_WARNINGS += -Wwrite-strings
  40 EXTRA_WARNINGS += -Wformat
  41
  42 ifneq ($(CC), clang)
  43 EXTRA_WARNINGS += -Wstrict-aliasing=3
  44 endif
  45
  46 # Hack to avoid type-punned warnings on old systems such as RHEL5:
  47 # We should be changing CFLAGS and checking gcc version, but this
  48 # will do for now and keep the above -Wstrict-aliasing=3 in place
  49 # in newer systems.
  50 # Needed for the __raw_cmpxchg in tools/arch/x86/include/asm/cmpxchg.h
  51 ifneq ($(filter 3.%,$(MAKE_VERSION)),)  # make-3
  52 EXTRA_WARNINGS += -fno-strict-aliasing
  53 endif
  54
  55 ifneq ($(findstring $(MAKEFLAGS), w),w)
  56 PRINT_DIR = --no-print-directory
  57 else
  58 NO_SUBDIR = :
  59 endif
  60
  61 ifneq ($(filter 4.%,$(MAKE_VERSION)),)  # make-4
  62 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
  63   silent=1
  64 endif
  65 else                                    # make-3.8x
  66 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
  67   silent=1
  68 endif
  69 endif
  70
  71 #
  72 # Define a callable command for descending to a new directory
  73 #
  74 # Call by doing: $(call descend,directory[,target])
  75 #
  76 descend = \
  77         +mkdir -p $(OUTPUT)$(1) && \
  78         $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
  79
  80 QUIET_SUBDIR0  = +$(MAKE) $(COMMAND_O) -C # space to separate -C and subdir
  81 QUIET_SUBDIR1  =
  82
  83 ifneq ($(silent),1)
  84   ifneq ($(V),1)
  85         QUIET_CC       = @echo '  CC       '$@;
  86         QUIET_CC_FPIC  = @echo '  CC FPIC  '$@;
  87         QUIET_AR       = @echo '  AR       '$@;
  88         QUIET_LINK     = @echo '  LINK     '$@;
  89         QUIET_MKDIR    = @echo '  MKDIR    '$@;
  90         QUIET_GEN      = @echo '  GEN      '$@;
  91         QUIET_SUBDIR0  = +@subdir=
  92         QUIET_SUBDIR1  = ;$(NO_SUBDIR) \
  93                           echo '  SUBDIR   '$$subdir; \
  94                          $(MAKE) $(PRINT_DIR) -C $$subdir
  95         QUIET_FLEX     = @echo '  FLEX     '$@;
  96         QUIET_BISON    = @echo '  BISON    '$@;
  97
  98         descend = \
  99                 +@echo         '  DESCEND  '$(1); \
 100                 mkdir -p $(OUTPUT)$(1) && \
 101                 $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
 102
 103         QUIET_CLEAN    = @printf '  CLEAN    %s\n' $1;
 104         QUIET_INSTALL  = @printf '  INSTALL  %s\n' $1;
 105   endif
 106 endif