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-aliasing=3 36 EXTRA_WARNINGS += -Wstrict-prototypes 37 EXTRA_WARNINGS += -Wswitch-default 38 EXTRA_WARNINGS += -Wswitch-enum 39 EXTRA_WARNINGS += -Wundef 40 EXTRA_WARNINGS += -Wwrite-strings 41 EXTRA_WARNINGS += -Wformat 42 43 ifneq ($(findstring $(MAKEFLAGS), w),w) 44 PRINT_DIR = --no-print-directory 45 else 46 NO_SUBDIR = : 47 endif 48 49 # 50 # Define a callable command for descending to a new directory 51 # 52 # Call by doing: $(call descend,directory[,target]) 53 # 54 descend = \ 55 +mkdir -p $(OUTPUT)$(1) && \ 56 $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2) 57 58 QUIET_SUBDIR0 = +$(MAKE) $(COMMAND_O) -C # space to separate -C and subdir 59 QUIET_SUBDIR1 = 60 61 ifneq ($(findstring $(MAKEFLAGS),s),s) 62 ifneq ($(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) 78 endif 79 endif 80
