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 := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
5 COMMAND_O := O=$(ABSOLUTE_O)
12 # check that the output directory actually exists
13 OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
14 $(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
18 # Include saner warnings here, which can catch bugs:
20 EXTRA_WARNINGS := -Wbad-function-cast
21 EXTRA_WARNINGS += -Wdeclaration-after-statement
22 EXTRA_WARNINGS += -Wformat-security
23 EXTRA_WARNINGS += -Wformat-y2k
24 EXTRA_WARNINGS += -Winit-self
25 EXTRA_WARNINGS += -Wmissing-declarations
26 EXTRA_WARNINGS += -Wmissing-prototypes
27 EXTRA_WARNINGS += -Wnested-externs
28 EXTRA_WARNINGS += -Wno-system-headers
29 EXTRA_WARNINGS += -Wold-style-definition
30 EXTRA_WARNINGS += -Wpacked
31 EXTRA_WARNINGS += -Wredundant-decls
32 EXTRA_WARNINGS += -Wshadow
33 EXTRA_WARNINGS += -Wstrict-aliasing=3
34 EXTRA_WARNINGS += -Wstrict-prototypes
35 EXTRA_WARNINGS += -Wswitch-default
36 EXTRA_WARNINGS += -Wswitch-enum
37 EXTRA_WARNINGS += -Wundef
38 EXTRA_WARNINGS += -Wwrite-strings
39 EXTRA_WARNINGS += -Wformat
41 ifneq ($(findstring $(MAKEFLAGS), w),w)
42 PRINT_DIR = --no-print-directory
48 # Define a callable command for descending to a new directory
50 # Call by doing: $(call descend,directory[,target])
53 +mkdir -p $(OUTPUT)$(1) && \
54 $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
56 QUIET_SUBDIR0 = +$(MAKE) $(COMMAND_O) -C # space to separate -C and subdir
59 ifneq ($(findstring $(MAKEFLAGS),s),s)
61 QUIET_CC = @echo ' ' CC $@;
62 QUIET_AR = @echo ' ' AR $@;
63 QUIET_LINK = @echo ' ' LINK $@;
64 QUIET_MKDIR = @echo ' ' MKDIR $@;
65 QUIET_GEN = @echo ' ' GEN $@;
66 QUIET_SUBDIR0 = +@subdir=
67 QUIET_SUBDIR1 = ;$(NO_SUBDIR) echo ' ' SUBDIR $$subdir; \
68 $(MAKE) $(PRINT_DIR) -C $$subdir
69 QUIET_FLEX = @echo ' ' FLEX $@;
70 QUIET_BISON = @echo ' ' BISON $@;
73 @echo ' ' DESCEND $(1); \
74 mkdir -p $(OUTPUT)$(1) && \
75 $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)