1 ifeq ("$(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)
9 # check that the output directory actually exists
10 OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
11 $(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
15 # Include saner warnings here, which can catch bugs:
17 EXTRA_WARNINGS := -Wbad-function-cast
18 EXTRA_WARNINGS += -Wdeclaration-after-statement
19 EXTRA_WARNINGS += -Wformat-security
20 EXTRA_WARNINGS += -Wformat-y2k
21 EXTRA_WARNINGS += -Winit-self
22 EXTRA_WARNINGS += -Wmissing-declarations
23 EXTRA_WARNINGS += -Wmissing-prototypes
24 EXTRA_WARNINGS += -Wnested-externs
25 EXTRA_WARNINGS += -Wno-system-headers
26 EXTRA_WARNINGS += -Wold-style-definition
27 EXTRA_WARNINGS += -Wpacked
28 EXTRA_WARNINGS += -Wredundant-decls
29 EXTRA_WARNINGS += -Wshadow
30 EXTRA_WARNINGS += -Wstrict-aliasing=3
31 EXTRA_WARNINGS += -Wstrict-prototypes
32 EXTRA_WARNINGS += -Wswitch-default
33 EXTRA_WARNINGS += -Wswitch-enum
34 EXTRA_WARNINGS += -Wundef
35 EXTRA_WARNINGS += -Wwrite-strings
36 EXTRA_WARNINGS += -Wformat
38 ifneq ($(findstring $(MAKEFLAGS), w),w)
39 PRINT_DIR = --no-print-directory
45 # Define a callable command for descending to a new directory
47 # Call by doing: $(call descend,directory[,target])
50 $(QUIET_SUBDIR0)$(1) $(QUIET_SUBDIR1) $(2)
52 QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
55 ifneq ($(findstring $(MAKEFLAGS),s),s)
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 $@;