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