1ifeq ("$(origin O)", "command line") 2 OUTPUT := $(O)/ 3endif 4 5ifneq ($(OUTPUT),) 6# check that the output directory actually exists 7OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd) 8$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist)) 9endif 10 11# 12# Include saner warnings here, which can catch bugs: 13# 14EXTRA_WARNINGS := -Wbad-function-cast 15EXTRA_WARNINGS += -Wdeclaration-after-statement 16EXTRA_WARNINGS += -Wformat-security 17EXTRA_WARNINGS += -Wformat-y2k 18EXTRA_WARNINGS += -Winit-self 19EXTRA_WARNINGS += -Wmissing-declarations 20EXTRA_WARNINGS += -Wmissing-prototypes 21EXTRA_WARNINGS += -Wnested-externs 22EXTRA_WARNINGS += -Wno-system-headers 23EXTRA_WARNINGS += -Wold-style-definition 24EXTRA_WARNINGS += -Wpacked 25EXTRA_WARNINGS += -Wredundant-decls 26EXTRA_WARNINGS += -Wshadow 27EXTRA_WARNINGS += -Wstrict-aliasing=3 28EXTRA_WARNINGS += -Wstrict-prototypes 29EXTRA_WARNINGS += -Wswitch-default 30EXTRA_WARNINGS += -Wswitch-enum 31EXTRA_WARNINGS += -Wundef 32EXTRA_WARNINGS += -Wwrite-strings 33EXTRA_WARNINGS += -Wformat 34 35ifneq ($(findstring $(MAKEFLAGS), w),w) 36PRINT_DIR = --no-print-directory 37else 38NO_SUBDIR = : 39endif 40 41QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir 42QUIET_SUBDIR1 = 43 44ifneq ($(findstring $(MAKEFLAGS),s),s) 45ifndef V 46 QUIET_CC = @echo ' ' CC $@; 47 QUIET_AR = @echo ' ' AR $@; 48 QUIET_LINK = @echo ' ' LINK $@; 49 QUIET_MKDIR = @echo ' ' MKDIR $@; 50 QUIET_GEN = @echo ' ' GEN $@; 51 QUIET_SUBDIR0 = +@subdir= 52 QUIET_SUBDIR1 = ;$(NO_SUBDIR) echo ' ' SUBDIR $$subdir; \ 53 $(MAKE) $(PRINT_DIR) -C $$subdir 54 QUIET_FLEX = @echo ' ' FLEX $@; 55 QUIET_BISON = @echo ' ' BISON $@; 56endif 57endif 58