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- ifneq ($(O),)
- ifeq ($(origin O), command line)
- dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
- ABSOLUTE_O := $(shell cd $(O) ; pwd)
- OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
- COMMAND_O := O=$(ABSOLUTE_O)
- ifeq ($(objtree),)
- objtree := $(O)
- endif
- endif
- endif
- # check that the output directory actually exists
- ifneq ($(OUTPUT),)
- OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
- $(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
- endif
- #
- # Include saner warnings here, which can catch bugs:
- #
- EXTRA_WARNINGS := -Wbad-function-cast
- EXTRA_WARNINGS += -Wdeclaration-after-statement
- EXTRA_WARNINGS += -Wformat-security
- EXTRA_WARNINGS += -Wformat-y2k
- EXTRA_WARNINGS += -Winit-self
- EXTRA_WARNINGS += -Wmissing-declarations
- EXTRA_WARNINGS += -Wmissing-prototypes
- EXTRA_WARNINGS += -Wnested-externs
- EXTRA_WARNINGS += -Wno-system-headers
- EXTRA_WARNINGS += -Wold-style-definition
- EXTRA_WARNINGS += -Wpacked
- EXTRA_WARNINGS += -Wredundant-decls
- EXTRA_WARNINGS += -Wshadow
- EXTRA_WARNINGS += -Wstrict-aliasing=3
- EXTRA_WARNINGS += -Wstrict-prototypes
- EXTRA_WARNINGS += -Wswitch-default
- EXTRA_WARNINGS += -Wswitch-enum
- EXTRA_WARNINGS += -Wundef
- EXTRA_WARNINGS += -Wwrite-strings
- EXTRA_WARNINGS += -Wformat
- ifneq ($(findstring $(MAKEFLAGS), w),w)
- PRINT_DIR = --no-print-directory
- else
- NO_SUBDIR = :
- endif
- #
- # Define a callable command for descending to a new directory
- #
- # Call by doing: $(call descend,directory[,target])
- #
- descend = \
- +mkdir -p $(OUTPUT)$(1) && \
- $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
- QUIET_SUBDIR0 = +$(MAKE) $(COMMAND_O) -C # space to separate -C and subdir
- QUIET_SUBDIR1 =
- ifneq ($(findstring $(MAKEFLAGS),s),s)
- ifneq ($(V),1)
- QUIET_CC = @echo ' CC '$@;
- QUIET_CC_FPIC = @echo ' CC FPIC '$@;
- QUIET_AR = @echo ' AR '$@;
- QUIET_LINK = @echo ' LINK '$@;
- QUIET_MKDIR = @echo ' MKDIR '$@;
- QUIET_GEN = @echo ' GEN '$@;
- QUIET_SUBDIR0 = +@subdir=
- QUIET_SUBDIR1 = ;$(NO_SUBDIR) \
- echo ' SUBDIR '$$subdir; \
- $(MAKE) $(PRINT_DIR) -C $$subdir
- QUIET_FLEX = @echo ' FLEX '$@;
- QUIET_BISON = @echo ' BISON '$@;
- descend = \
- +@echo ' DESCEND '$(1); \
- mkdir -p $(OUTPUT)$(1) && \
- $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
- QUIET_CLEAN = @printf ' CLEAN %s\n' $1;
- QUIET_INSTALL = @printf ' INSTALL %s\n' $1;
- endif
- endif
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