Subversion Repositories test_project

# ==========================================================================

# Building

# ==========================================================================

src := $(obj)

PHONY := __build

__build:

# Init all relevant variables used in kbuild files so

# 1) they have correct type

# 2) they do not inherit any value from the environment

obj-y :=

obj-m :=

lib-y :=

lib-m :=

always :=

targets :=

subdir-y :=

subdir-m :=

EXTRA_AFLAGS   :=

EXTRA_CFLAGS   :=

EXTRA_CPPFLAGS :=

EXTRA_LDFLAGS  :=

asflags-y  :=

ccflags-y  :=

cppflags-y :=

ldflags-y  :=

# Read .config if it exist, otherwise ignore

-include include/config/auto.conf

include scripts/Kbuild.include

# For backward compatibility check that these variables does not change

save-cflags := $(CFLAGS)

# The filename Kbuild has precedence over Makefile

kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))

kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)

include $(kbuild-file)

# If the save-* variables changed error out

ifeq ($(KBUILD_NOPEDANTIC),)

        ifneq ("$(save-cflags)","$(CFLAGS)")

                $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use EXTRA_CFLAGS)

        endif

endif

include scripts/Makefile.lib

ifdef host-progs

ifneq ($(hostprogs-y),$(host-progs))

$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)

hostprogs-y += $(host-progs)

endif

endif

# Do not include host rules unles needed

ifneq ($(hostprogs-y)$(hostprogs-m),)

include scripts/Makefile.host

endif

ifneq ($(KBUILD_SRC),)

# Create output directory if not already present

_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))

# Create directories for object files if directory does not exist

# Needed when obj-y := dir/file.o syntax is used

_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))

endif

ifndef obj

$(warning kbuild: Makefile.build is included improperly)

endif

# ===========================================================================

ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),)

lib-target := $(obj)/lib.a

endif

ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target)),)

builtin-target := $(obj)/built-in.o

endif

# We keep a list of all modules in $(MODVERDIR)

__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \

         $(if $(KBUILD_MODULES),$(obj-m)) \

         $(subdir-ym) $(always)

        @:

# Linus' kernel sanity checking tool

ifneq ($(KBUILD_CHECKSRC),0)

  ifeq ($(KBUILD_CHECKSRC),2)

    quiet_cmd_force_checksrc = CHECK   $<

          cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;

  else

      quiet_cmd_checksrc     = CHECK   $<

            cmd_checksrc     = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;

  endif

endif

# Compile C sources (.c)

# ---------------------------------------------------------------------------

# Default is built-in, unless we know otherwise

modkern_cflags := $(CFLAGS_KERNEL)

quiet_modtag := $(empty)   $(empty)

$(real-objs-m)        : modkern_cflags := $(CFLAGS_MODULE)

$(real-objs-m:.o=.i)  : modkern_cflags := $(CFLAGS_MODULE)

$(real-objs-m:.o=.s)  : modkern_cflags := $(CFLAGS_MODULE)

$(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE)

$(real-objs-m)        : quiet_modtag := [M]

$(real-objs-m:.o=.i)  : quiet_modtag := [M]

$(real-objs-m:.o=.s)  : quiet_modtag := [M]

$(real-objs-m:.o=.lst): quiet_modtag := [M]

$(obj-m)              : quiet_modtag := [M]

# Default for not multi-part modules

modname = $(basetarget)

$(multi-objs-m)         : modname = $(modname-multi)

$(multi-objs-m:.o=.i)   : modname = $(modname-multi)

$(multi-objs-m:.o=.s)   : modname = $(modname-multi)

$(multi-objs-m:.o=.lst) : modname = $(modname-multi)

$(multi-objs-y)         : modname = $(modname-multi)

$(multi-objs-y:.o=.i)   : modname = $(modname-multi)

$(multi-objs-y:.o=.s)   : modname = $(modname-multi)

$(multi-objs-y:.o=.lst) : modname = $(modname-multi)

quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@

cmd_cc_s_c       = $(CC) $(c_flags) -fverbose-asm -S -o $@ $<

$(obj)/%.s: $(src)/%.c FORCE

        $(call if_changed_dep,cc_s_c)

quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@

cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<

$(obj)/%.i: $(src)/%.c FORCE

        $(call if_changed_dep,cc_i_c)

quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@

cmd_cc_symtypes_c          = \

                $(CPP) -D__GENKSYMS__ $(c_flags) $<                     \

                | $(GENKSYMS) -T $@ >/dev/null;                         \

                test -s $@ || rm -f $@

$(obj)/%.symtypes : $(src)/%.c FORCE

        $(call if_changed_dep,cc_symtypes_c)

# C (.c) files

# The C file is compiled and updated dependency information is generated.

# (See cmd_cc_o_c + relevant part of rule_cc_o_c)

quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@

ifndef CONFIG_MODVERSIONS

cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<

else

# When module versioning is enabled the following steps are executed:

# o compile a .tmp_.o from .c

# o if .tmp_.o doesn't contain a __ksymtab version, i.e. does

#   not export symbols, we just rename .tmp_.o to .o and

#   are done.

# o otherwise, we calculate symbol versions using the good old

#   genksyms on the preprocessed source and postprocess them in a way

#   that they are usable as a linker script

# o generate .o from .tmp_.o using the linker to

#   replace the unresolved symbols __crc_exported_symbol with

#   the actual value of the checksum generated by genksyms

cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<

cmd_modversions =                                                       \

        if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then     \

                $(CPP) -D__GENKSYMS__ $(c_flags) $<                     \

                | $(GENKSYMS) $(if $(KBUILD_SYMTYPES),                  \

                              -T $(@D)/$(@F:.o=.symtypes)) -a $(ARCH)   \

                > $(@D)/.tmp_$(@F:.o=.ver);                             \

                                                                        \

                $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)              \

                        -T $(@D)/.tmp_$(@F:.o=.ver);                    \

                rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);        \

        else                                                            \

                mv -f $(@D)/.tmp_$(@F) $@;                              \

        fi;

endif

define rule_cc_o_c

        $(call echo-cmd,checksrc) $(cmd_checksrc)                         \

        $(call echo-cmd,cc_o_c) $(cmd_cc_o_c);                            \

        $(cmd_modversions)                                                \

        scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \

                                                      $(dot-target).tmp;  \

        rm -f $(depfile);                                                 \

        mv -f $(dot-target).tmp $(dot-target).cmd

endef

# Built-in and composite module parts

$(obj)/%.o: $(src)/%.c FORCE

        $(call cmd,force_checksrc)

        $(call if_changed_rule,cc_o_c)

# Single-part modules are special since we need to mark them in $(MODVERDIR)

$(single-used-m): $(obj)/%.o: $(src)/%.c FORCE

        $(call cmd,force_checksrc)

        $(call if_changed_rule,cc_o_c)

        @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)

quiet_cmd_cc_lst_c = MKLST   $@

      cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \

                     $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \

                                     System.map $(OBJDUMP) > $@

$(obj)/%.lst: $(src)/%.c FORCE

        $(call if_changed_dep,cc_lst_c)

# Compile assembler sources (.S)

# ---------------------------------------------------------------------------

modkern_aflags := $(AFLAGS_KERNEL)

$(real-objs-m)      : modkern_aflags := $(AFLAGS_MODULE)

$(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)

quiet_cmd_as_s_S = CPP $(quiet_modtag) $@

cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<

$(obj)/%.s: $(src)/%.S FORCE

        $(call if_changed_dep,as_s_S)

quiet_cmd_as_o_S = AS $(quiet_modtag)  $@

cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<

$(obj)/%.o: $(src)/%.S FORCE

        $(call if_changed_dep,as_o_S)

targets += $(real-objs-y) $(real-objs-m) $(lib-y)

targets += $(extra-y) $(MAKECMDGOALS) $(always)

# Linker scripts preprocessor (.lds.S -> .lds)

# ---------------------------------------------------------------------------

quiet_cmd_cpp_lds_S = LDS     $@

      cmd_cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ -o $@ $<

$(obj)/%.lds: $(src)/%.lds.S FORCE

        $(call if_changed_dep,cpp_lds_S)

# Build the compiled-in targets

# ---------------------------------------------------------------------------

# To build objects in subdirs, we need to descend into the directories

$(sort $(subdir-obj-y)): $(subdir-ym) ;

#

# Rule to compile a set of .o files into one .o file

#

ifdef builtin-target

quiet_cmd_link_o_target = LD      $@

# If the list of objects to link is empty, just create an empty built-in.o

cmd_link_o_target = $(if $(strip $(obj-y)),\

                      $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^),\

                      rm -f $@; $(AR) rcs $@)

$(builtin-target): $(obj-y) FORCE

        $(call if_changed,link_o_target)

targets += $(builtin-target)

endif # builtin-target

#

# Rule to compile a set of .o files into one .a file

#

ifdef lib-target

quiet_cmd_link_l_target = AR      $@

cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y)

$(lib-target): $(lib-y) FORCE

        $(call if_changed,link_l_target)

targets += $(lib-target)

endif

#

# Rule to link composite objects

#

#  Composite objects are specified in kbuild makefile as follows:

#    -objs := 

#  or

#    -y    := 

link_multi_deps =                     \

$(filter $(addprefix $(obj)/,         \

$($(subst $(obj)/,,$(@:.o=-objs)))    \

$($(subst $(obj)/,,$(@:.o=-y)))), $^)

quiet_cmd_link_multi-y = LD      $@

cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps)

quiet_cmd_link_multi-m = LD [M]  $@

cmd_link_multi-m = $(cmd_link_multi-y)

# We would rather have a list of rules like

#       foo.o: $(foo-objs)

# but that's not so easy, so we rather make all composite objects depend

# on the set of all their parts

$(multi-used-y) : %.o: $(multi-objs-y) FORCE

        $(call if_changed,link_multi-y)

$(multi-used-m) : %.o: $(multi-objs-m) FORCE

        $(call if_changed,link_multi-m)

        @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)

targets += $(multi-used-y) $(multi-used-m)

# Descending

# ---------------------------------------------------------------------------

PHONY += $(subdir-ym)

$(subdir-ym):

        $(Q)$(MAKE) $(build)=$@

# Add FORCE to the prequisites of a target to force it to be always rebuilt.

# ---------------------------------------------------------------------------

PHONY += FORCE

FORCE:

# Read all saved command lines and dependencies for the $(targets) we

# may be building above, using $(if_changed{,_dep}). As an

# optimization, we don't need to read them if the target does not

# exist, we will rebuild anyway in that case.

targets := $(wildcard $(sort $(targets)))

cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))

ifneq ($(cmd_files),)

  include $(cmd_files)

endif

# Declare the contents of the .PHONY variable as phony.  We keep that

# information in a variable se we can use it in if_changed and friends.

.PHONY: $(PHONY)