uclibc-ng/Makerules

#
compile.c = $(CC) -c $< -o $@ $(CPPFLAGS) $(CFLAGS) $(ARCH_CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$@) $(CFLAGS-$<)
compile.S = $(compile.c) $(S_CPPFLAGS) $(ASFLAGS) $(ARCH_ASFLAGS) $(ASFLAGS-$(suffix $@)) $(ASFLAGS-$@) $(ASFLAGS-$<)

#S_CPPFLAGS = -D__ASSEMBLER__ $(asm-CPPFLAGS)

ifeq ($(DOPIC),y)
DISABLE_PIC := $(PICFLAG)
else
DISABLE_PIC := -fno-PIC
endif

# objects
ifeq ($(strip $(CSRC)),)
CSRC = $(wildcard *.c)
endif
COBJ = $(CSRC:.c=.o)
COBJ_PIC = $(COBJ:.o=.os)

#MSRC = some.c
#MOBJ = has to be defined if used
MOBJ_PIC = $(MOBJ:.o=.os)

#SSRC = $(wildcard *.S)
SOBJ = $(SSRC:.S=.o)
SOBJ_PIC = $(SOBJ:.o=.os)

#ARCH_DIR = $(TARGET_ARCH)
#ARCH_CSRC = $(wildcard $(ARCH_DIR)/*.c)
ARCH_COBJ = $(ARCH_CSRC:.c=.o)
ARCH_COBJ_PIC = $(ARCH_COBJ:.o=.os)

#ARCH_SSRC = $(wildcard $(TARGET_ARCH)/*.S)
ARCH_SOBJ = $(ARCH_SSRC:.S=.o)
ARCH_SOBJ_PIC = $(ARCH_SOBJ:.o=.os)

OBJS = $(COBJ) $(SOBJ) $(MOBJ)
OBJS_PIC = $(COBJ_PIC) $(SOBJ_PIC) $(MOBJ_PIC)

ARCH_OBJS = $(ARCH_COBJ) $(ARCH_SOBJ)
ARCH_OBJS_PIC = $(ARCH_COBJ_PIC) $(ARCH_SOBJ_PIC)

$(COBJ): %.o : %.c
	$(compile.c) $(DISABLE_PIC)

$(MOBJ): $(MSRC)
	$(compile.c) $(DISABLE_PIC) -DL_$(patsubst %.o,%, $@)

$(SOBJ): %.o : %.S
	$(compile.S) $(DISABLE_PIC)

$(COBJ_PIC): %.os : %.c
	$(compile.c) $(PICFLAG)

$(MOBJ_PIC): $(MSRC%)
	$(compile.c) $(PICFLAG) -DL_$(patsubst %.os,%, $@)

$(SOBJ_PIC): %.os : %.S
	$(compile.S) $(PICFLAG)

$(ARCH_COBJ): %.o : %.c
	$(compile.c) $(DISABLE_PIC)

$(ARCH_SOBJ): %.o : %.S
	$(compile.S) $(DISABLE_PIC)

$(ARCH_COBJ_PIC): %.os : %.c
	$(compile.c) $(PICFLAG)

$(ARCH_SOBJ_PIC): %.os : %.S
	$(compile.S) $(PICFLAG)

#ifeq ($(strip $(OBJ_DIR)),)
#OBJ_DIR = $(patsubst %libc/,, $(shell pwd))
#endif
OBJ_FILE = $(subst /,., $(OBJ_DIR))
OBJ_LIST = $(patsubst %,$(TOPDIR)libc/obj.%, $(OBJ_FILE))
OBJ_LIST_PIC = $(patsubst %,$(TOPDIR)libc/obj_pic.%, $(OBJ_FILE))

ifeq ($(DOPIC),y)
objs: $(OBJ_LIST_PIC)
else
objs: $(OBJ_LIST) $(OBJ_LIST_PIC)
endif

$(OBJ_LIST): $(OBJS)
	$(STRIPTOOL) -x -R .note -R .comment $^
	echo $(patsubst %,$(OBJ_DIR)/%, $^) > $@

$(OBJ_LIST_PIC): $(OBJS_PIC)
	$(STRIPTOOL) -x -R .note -R .comment $^
	echo $(patsubst %,$(OBJ_DIR)/%, $^) > $@

# libraries
#LIB_NAME=libsome
AR_LIB_NAME = $(TOPDIR)lib/$(LIB_NAME).a
AR_PIC_LIB_NAME = $(LIB_NAME)_pic.a
ifeq ($(strip $(SO_LIB_NAME)),)
SO_LIB_NAME = $(TOPDIR)lib/$(LIB_NAME).so
endif
ifeq ($(strip $(SO_FULL_NAME)),)
SO_FULL_NAME = $(LIB_NAME)-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
endif
ifeq ($(strip $(SO_MAJOR_NAME)),)
SO_MAJOR_NAME = $(LIB_NAME).so.$(MAJOR_VERSION)
endif

interp := $(TOPDIR)libc/misc/internals/interp.os
ifeq ($(strip $(EXTRA_LINK_LIBS)),)
EXTRA_LINK_LIBS = $(interp) -L$(TOPDIR)lib -lc $(LDADD_LIBFLOAT) $(LIBGCC)
endif

libs: libs_shared $(AR_LIB_NAME)
ifeq ($(HAVE_SHARED),y)
libs_shared: $(SO_LIB_NAME)
else
libs_shared:
endif

$(AR_PIC_LIB_NAME): $(OBJS_PIC) $(ARCH_OBJS_PIC)
	$(RM) $@
ifneq ($(strip $(STRIP_FLAGS)),)
	$(STRIPTOOL) $(STRIP_FLAGS) $^
else
	$(STRIPTOOL) -x -R .note -R .comment $^
endif
	$(AR) $(ARFLAGS) $@ $(OBJS_PIC)
ifneq ($(strip $(ARCH_OBJS_PIC)),)
	$(AR) $(ARFLAGS) $@ $(ARCH_OBJS_PIC)
endif

ifeq ($(DOPIC),y)
$(AR_LIB_NAME): $(AR_PIC_LIB_NAME)
	$(INSTALL) -d $(TOPDIR)lib
	$(RM) $@
	cp $< $@
else
$(AR_LIB_NAME): $(OBJS) $(ARCH_OBJS)
	$(INSTALL) -d $(TOPDIR)lib
	$(RM) $@
ifneq ($(strip $(STRIP_FLAGS)),)
	$(STRIPTOOL) $(STRIP_FLAGS) $^
else
	$(STRIPTOOL) -x -R .note -R .comment $^
endif
	$(AR) $(ARFLAGS) $@ $(OBJS)
ifneq ($(strip $(ARCH_OBJS)),)
	$(AR) $(ARFLAGS) $@ $(ARCH_OBJS)
endif
endif

$(SO_LIB_NAME): $(AR_PIC_LIB_NAME)
	$(INSTALL) -d $(TOPDIR)lib
	$(RM) $(TOPDIR)lib/$(SO_FULL_NAME) $(TOPDIR)lib/$(SO_MAJOR_NAME) $@
	$(LD) $(LDFLAGS) -soname=$(SO_MAJOR_NAME) -o $(TOPDIR)lib/$(SO_FULL_NAME) \
		$(EXTRA_LINK_OPTS) $(SHARED_START_FILES) --whole-archive $< \
		--no-whole-archive $(EXTRA_LINK_LIBS) $(SHARED_END_FILES)
	$(LN) -sf $(SO_FULL_NAME) $(TOPDIR)lib/$(SO_MAJOR_NAME)
	$(LN) -sf $(SO_FULL_NAME) $@

# crt stuff
ifeq ($(HAVE_ELF),y)
CRT = crt1
else
CRT = crt0
endif

CTOR_TARGETS := $(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o

crts: $(TOPDIR)lib/$(CRT).o $(TOPDIR)lib/S$(CRT).o $(CTOR_TARGETS)

$(TOPDIR)lib/$(CRT).o: $(CRT).S
	$(compile.S) $(DISABLE_PIC) -DL_$*
	$(STRIPTOOL) -x -R .note -R .comment $@

$(TOPDIR)lib/S$(CRT).o: $(CRT).S
	$(compile.S) $(PIEFLAG) -DL_$*
	$(STRIPTOOL) -x -R .note -R .comment $@

ifeq ($(UCLIBC_CTOR_DTOR),y)
$(TOPDIR)lib/crti.o: crti.S
	$(INSTALL) -d $(TOPDIR)lib/
	$(compile.S) $(PICFLAG) $(SSP_DISABLE_FLAGS)

$(TOPDIR)lib/crtn.o: crtn.S
	$(INSTALL) -d $(TOPDIR)lib/
	$(compile.S) $(PICFLAG) $(SSP_DISABLE_FLAGS)
else
$(CTOR_TARGETS):
	$(INSTALL) -d $(TOPDIR)lib/
	$(AR) $(ARFLAGS) $@
endif

# addons
headers:

tags:
	ctags -R

clean:
	$(RM) *.o *.os *.a
ifneq ($(strip $(ARCH_DIR)),)
	$(RM) $(ARCH_DIR)/*.o $(ARCH_DIR)/*.os
endif

subdirs: $(patsubst %, _dir_%, $(DIRS))
subdirs_clean: $(patsubst %, _dirclean_%, $(ALL_SUBDIRS))

$(patsubst %, _dir_%, $(DIRS)) : dummy
	$(MAKE) -C $(patsubst _dir_%, %, $@)

$(patsubst %, _dirclean_%, $(ALL_SUBDIRS)) : dummy
	$(MAKE) -C $(patsubst _dirclean_%, %, $@) clean

.PHONY: dummy
#