path: root/Makerules

#
# Licensed under LGPL v2.1, see the file COPYING.LIB in this tarball for details.
#

.SUFFIXES: .c .S .o .os .oS .so .a .s .i

PHONY := FORCE

.PHONY: dummy $(PHONY) \
	all check test $(clean_targets) \
	config dist menuconfig oldconfig release \
	subdirs utils help

# order is important, the stripping uses STRIP_FLAGS for lib-so, but not for lib-a
ifeq ($(HAVE_SHARED),y)
.LIBPATTERNS: "lib%.so"
libs: $(lib-so-y) $(lib-a-y)
$(lib-so-y): | $(interp)
else
.LIBPATTERNS: "lib%.a"
ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
libs: $(lib-gdb-y)
endif
libs: $(lib-a-y)
endif
objs: all_objs

shared_objs = $(libc-y:.o=.os) $(libc-shared-y) $(libc-nonshared-y) \
	$(libcrypt-so-y) $(libdl-so-y) \
	$(libintl-so-y) $(libm-so-y) $(libnsl-so-y) \
	$(libpthread-so-y) $(libpthread-nonshared-y) $(libthread_db-so-y) \
	$(libresolv-so-y) $(librt-so-y) \
	$(ldso-y) \
	$(libutil-so-y)

ar_objs =  $(libc-y) $(libc-static-y) $(libcrypt-a-y) \
	$(libdl-a-y) $(libintl-a-y) $(libm-a-y) $(libnsl-a-y) \
	$(libpthread-a-y) $(libthread_db-a-y) \
	$(libresolv-a-y) $(librt-a-y) $(libutil-a-y)
ifeq ($(DOPIC),y)
ar_objs := $(ar_objs:.o=.os)
endif
flat_objs = $(lib-gdb-y)

ifeq ($(HAVE_SHARED),y)
all_objs: $(sort $(shared_objs) $(ar_objs))
else
all_objs: $(ar_objs)
endif
$(shared_objs) $(ar_objs): | $(sub_headers)

headers-y: $(headers-y)
	@true

MAKEFLAGS += --no-print-directory
SHELL_SET_X := set +x
ifneq ($(findstring s,$(MAKEFLAGS)),)
export MAKE_IS_SILENT := y
SECHO := -@false
DISP := sil
Q := @
else
export MAKE_IS_SILENT := n
SECHO := @echo
ifneq ($(V)$(VERBOSE),)
SHELL_SET_X := set -x
DISP := ver
Q :=
else
DISP := pur
Q := @
endif
endif

show_objs = $(subst ../,,$@)

pur_disp_compile.c = echo "  "CC $(show_objs)
pur_disp_compile.i = echo "  "CPP $(show_objs)
pur_disp_compile.s = echo "  "CC-S $(show_objs)
pur_disp_compile.u = echo "  "CC $(show_objs)
pur_disp_compile.S = echo "  "AS $(show_objs)
pur_disp_compile.m = $(pur_disp_compile.c)
pur_disp_compile-m = echo "  "CC-m $(show_objs)
pur_disp_hcompile.u= echo "  "HOSTCC $(show_objs)
pur_disp_hcompile.o= echo "  "HOSTCC-o $(show_objs)
pur_disp_strip     = echo "  "STRIP $(STRIP_FLAGS) $@
pur_disp_t_strip   = echo "  "STRIP $(STRIP_FLAGS) $@
pur_disp_ar        = echo "  "AR $(ARFLAGS) $@
pur_disp_ld        = echo "  "LD $(1)
pur_disp_ln        = echo "  "LN $@
pur_disp_mkdir     = echo "  "MKDIR $@
pur_disp_gen       = echo "  "GEN $@
pur_disp_unifdef   = echo "  "UNIFDEF $@

sil_disp_compile.c = true
sil_disp_compile.i = true
sil_disp_compile.s = true
sil_disp_compile.u = true
sil_disp_compile.S = true
sil_disp_compile.m = true
sil_disp_compile-m = true
sil_disp_hcompile.u= true
sil_disp_hcompile.o= true
sil_disp_strip     = true
sil_disp_t_strip   = true
sil_disp_ar        = true
sil_disp_ld        = true
sil_disp_ln        = true
sil_disp_mkdir     = true
sil_disp_gen       = true
sil_disp_unifdef   = true

ver_disp_compile.c = echo $(cmd_compile.c)
ver_disp_compile.i = echo $(cmd_compile.i)
ver_disp_compile.s = echo $(cmd_compile.s)
ver_disp_compile.u = echo $(cmd_compile.u)
ver_disp_compile.S = echo $(cmd_compile.S)
ver_disp_compile.m = echo $(cmd_compile.m)
ver_disp_compile-m = echo $(cmd_compile-m)
ver_disp_hcompile.u= echo $(cmd_hcompile.u)
ver_disp_hcompile.o= echo $(cmd_hcompile.o)
ver_disp_strip     = echo $(cmd_strip)
ver_disp_t_strip   = echo $(cmd_t_strip)
ver_disp_ar        = echo $(cmd_ar)
ver_disp_ld        =
ver_disp_ln        =
ver_disp_mkdir     =
ver_disp_gen       =
ver_disp_unifdef   = echo $(cmd_unifdef)

disp_compile.c = $($(DISP)_disp_compile.c)
disp_compile.i = $($(DISP)_disp_compile.i)
disp_compile.s = $($(DISP)_disp_compile.s)
disp_compile.u = $($(DISP)_disp_compile.u)
disp_compile.S = $($(DISP)_disp_compile.S)
disp_compile.m = $($(DISP)_disp_compile.m)
disp_compile-m = $($(DISP)_disp_compile-m)
disp_hcompile.u= $($(DISP)_disp_hcompile.u)
disp_hcompile.o= $($(DISP)_disp_hcompile.o)
disp_strip     = $($(DISP)_disp_strip)
disp_t_strip   = $($(DISP)_disp_t_strip)
disp_ar        = $($(DISP)_disp_ar)
disp_ld        = $($(DISP)_disp_ld)
disp_ln        = $($(DISP)_disp_ln)
disp_mkdir     = $($(DISP)_disp_mkdir)
disp_gen       = $($(DISP)_disp_gen)
disp_unifdef   = $($(DISP)_disp_unifdef)

any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)

# ../foo/bar/baz.ext -> foo_bar_baz.ext
variablify = $(subst /,_,$(subst $(top_builddir),,$(1)))
# strip the top_builddir off everything to make the *string* idempotent for -C
dirify = $(subst $(top_builddir),,$(patsubst -L$(top_builddir)%,-L%,$(patsubst -I$(top_builddir)%,-I%,$(1))))

# True if not identical. Neither order nor whitespace nor identical flags
# matter.
compare_flags = \
	$(strip $(filter-out $(call dirify,$(cmd_$(call variablify,$(1)))), \
				$(call dirify,$(cmd_$(call variablify,$(@))))) \
		$(filter-out $(call dirify,$(cmd_$(call variablify,$(@)))), \
				$(call dirify,$(cmd_$(call variablify,$(1))))))

# Rebuild if any prerequisite, the used CC or flags changed.
# Previously used flags are stored in the corresponding .%.dep files
maybe_exec = \
		$(if $(strip $(compare_flags) $(any-prereq)), \
		@set -e; \
		$(disp_$(1)); \
		$(cmd_$(1)); \
		echo 'cmd_$(call variablify,$@) := $(call dirify,$(cmd_$(call variablify,$1)))' >> $(dir $@).$(notdir $@).dep)


CFLAGS_gen.dep = -MT $@ -MD -MP -MF $(dir $@).$(notdir $@).dep

cmd_compile.c = $(CC) -c $< -o $@ $(CFLAGS) $(ARCH_CFLAGS) \
	$(CFLAGS-$(suffix $@)) \
	$(filter-out $(CFLAGS-OMIT-$(notdir $<)),$(CFLAGS-$(notdir $(<D)))) \
	$(CFLAGS-$(subst $(top_srcdir),,$(dir $<))) \
	$(CFLAGS-$(notdir $<)) \
	$(CFLAGS-$(notdir $@)) \
	$(CFLAGS_gen.dep)
cmd_compile.i = $(cmd_compile.c:-c=-E -dD $(EXTRA_CPPFLAGS))
cmd_compile.s = $(cmd_compile.c:-c=-S)
cmd_compile.u = $(CC) $^ $(DEPS-$(notdir $@)) -o $@ $(CFLAGS) $(CFLAGS-$(notdir $(^D))) $(CFLAGS-$(notdir $@)) $(CFLAGS_gen.dep)
cmd_compile.S = $(filter-out -std=gnu99, $(cmd_compile.c)) -D__ASSEMBLER__ $(ASFLAGS) $(ARCH_ASFLAGS) $(ASFLAGS-$(suffix $@)) $(ASFLAGS-$(notdir $<)) $(ASFLAGS-$(notdir $@))
cmd_compile.m = $(cmd_compile.c) -DL_$(patsubst %$(suffix $(notdir $@)),%,$(notdir $@))

cmd_compile-m = $(CC) $^ -c -o $@ $(CFLAGS) $(ARCH_CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(notdir $(@D))) $(CFLAGS-$(notdir $@))
cmd_strip     = $(STRIPTOOL) $(STRIP_FLAGS) $^
cmd_t_strip   = $(STRIPTOOL) $(STRIP_FLAGS) $@
cmd_ar        = $(AR) $(ARFLAGS) $@ $^

define do_ln
	@$(disp_ln)
	$(Q)$(LN) -fs
endef

compile.c = @$(call maybe_exec,compile.c)
compile.i =  $(call maybe_exec,compile.i)
compile.s =  $(call maybe_exec,compile.s)
compile.S = @$(call maybe_exec,compile.S)
compile.m = @$(call maybe_exec,compile.m)
compile-m = @$(disp_compile-m) ; $(cmd_compile-m) ; $(cmd_t_strip)
do_strip  = @$(disp_strip)     ; $(cmd_strip)
do_t_strip= @$(disp_t_strip)   ; $(cmd_t_strip)
do_unifdef= @$(disp_unifdef)   ; $(cmd_unifdef)
hcompile.u= @$(call maybe_exec,hcompile.u)
hcompile.o= @$(call maybe_exec,hcompile.o)

define do_ar
	$(do_strip)
	@$(disp_ar) ; $(cmd_ar)
endef
define compile.u
	@$(disp_compile.u) ; $(cmd_compile.u)
	@$(disp_t_strip)
endef
cmd_hcompile.u = $(HOSTCC) $^ $(DEPS-$(notdir $@)) -o $@ $(BUILD_LDFLAGS) $(BUILD_LDFLAGS-$(notdir $(^D))) $(BUILD_LDFLAGS-$(notdir $@)) $(BUILD_CFLAGS) $(BUILD_CFLAGS-$(notdir $(^D))) $(BUILD_CFLAGS-$(notdir $@))
cmd_hcompile.o = $(HOSTCC) $^ $(DEPS-$(notdir $@)) -c -o $@ $(BUILD_CFLAGS) $(BUILD_CFLAGS-$(notdir $(^D))) $(BUILD_CFLAGS-$(notdir $@))

define link.so
	$(Q)$(INSTALL) -d $(dir $@)
	$(Q)$(RM) $@ $@.$(2) $(dir $@)$(1)
	@$(disp_ld)
	$(Q)$(CC) $(LDFLAGS-$(notdir $@)) -Wl,-soname=$(notdir $@).$(2) \
		$(NOSTDLIB_CFLAGS) -o $(dir $@)$(1) $(START_FILE-$(notdir $@)) \
		-Wl,--whole-archive $(firstword $^) -Wl,--no-whole-archive \
		$(LIBS-$(notdir $@)) $(LIBGCC) $(END_FILE-$(notdir $@))
	$(Q)$(LN) -sf $(1) $@.$(2)
	$(Q)$(LN) -sf $(1) $@
endef

# CRT files needed by link-flat.so
LINK_FLAT_CRTS := $(top_builddir)lib/Scrt1.o $(top_builddir)lib/crti.o \
	$(top_builddir)lib/crtn.o

# Create a shared flat library from the archive named by the first dependency.
# $@ names the shared library's .gdb file, not the flat file itself.
# (This is because the .gdb suffix makes the ELF file more distinctive
# than the suffixless flat file.)
#
# Argument 1 is the shared library file -- i.e. $(@:.gdb=) -- and argument 2
# is the shared library identifier.  If it wasn't for $(disp_ld), we could
# avoid passing $(@:.gdb=) as an argument and use $(@:.gdb=) instead of $(1).
#
# This is so far only used for libc, for which we want to link the entire
# libgcc into the shared object.
define link-flat.so
	$(Q)$(INSTALL) -d $(dir $@)
	$(Q)$(RM) $(1) $@
	@$(disp_ld)
	$(Q)$(CC) $(LDFLAGS-$(notdir $@)) $(NOSTDLIB_CFLAGS) -o $(1) \
		-Wl,-elf2flt -Wl,-shared-lib-id,$(2) $(top_builddir)lib/Scrt1.o \
		$(top_builddir)/lib/crti.o -Wl,--whole-archive $(firstword $^) \
		$(LIBGCC) -Wl,--no-whole-archive $(LIBS-$(notdir $@)) $(LIBGCC) \
		$(top_builddir)/lib/crtn.o
endef

define linkm.so
	$(Q)$(INSTALL) -d $(dir $@)
	$(Q)$(RM) $@ $@.$(2) $(dir $@)$(1)
	$(do_strip)
	@$(disp_ld)
	$(Q)$(CC) $(LDFLAGS-$(notdir $@)) -Wl,-soname=$(notdir $@).$(2) \
		$(NOSTDLIB_CFLAGS) -o $(dir $@)$(1) $(START_FILE-$(notdir $@)) \
		$^ \
		$(LIBS-$(notdir $@)) $(LIBGCC) $(END_FILE-$(notdir $@))
	$(Q)$(LN) -sf $(1) $@.$(2)
	$(Q)$(LN) -sf $(1) $@
endef

CFLAGS-.os+=$(PICFLAG)
CFLAGS-.oS+=$(PICFLAG) -DSHARED

%.o:  %.c FORCE ; $(compile.c)
%.os: %.c FORCE ; $(compile.c)
%.oS: %.c FORCE ; $(compile.c)
%.o:  %.S FORCE ; $(compile.S)
%.os: %.S FORCE ; $(compile.S)
%.oS: %.S FORCE ; $(compile.S)
%.o:  %.s FORCE ; $(compile.S)
%.os: %.s FORCE ; $(compile.S)
%.oS: %.s FORCE ; $(compile.S)
%.i:  %.c FORCE ; $(compile.i)
%.i:  %.S FORCE ; $(compile.i)
%.s:  %.c FORCE ; $(compile.s)
%.s:  %.S FORCE ; $(compile.s)

$(top_builddir)lib/interp.c: | $(sub_headers)
	$(Q)$(INSTALL) -d $(dir $@)
	$(Q)echo "/* Force shared libraries to know about the correct library loader */" > $@
	$(Q)echo "#include <features.h>" >> $@
	$(Q)echo "const char __dl_ldso__[] __attribute__ ((section " \
		"(\".interp\"))) =\""$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)"\";" >> $@

$(interp): $(top_builddir)lib/interp.c
	$(compile.c)
	$(Q)$(STRIPTOOL) -x -R .note -R .comment $@

$(ldso):
	@cd $(top_builddir); $(MAKE) lib/$(patsubst %.$(MAJOR_VERSION),%,$(notdir $@))

$(libc):
	@cd $(top_builddir); $(MAKE) lib/$(patsubst %.$(MAJOR_VERSION),%,$(notdir $@))

CRT := crt1

ifeq ($(HAVE_SHARED)$(UCLIBC_FORMAT_SHARED_FLAT),y)
CRTS=$(top_builddir)lib/$(CRT).o $(top_builddir)lib/S$(CRT).o
else
CRTS=$(top_builddir)lib/$(CRT).o
endif

ASFLAGS-$(CRT).o := -DL_$(CRT)
ASFLAGS-S$(CRT).o := $(PIEFLAG) -DL_S$(CRT)
$(CRTS): $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/$(CRT).S
	$(Q)$(INSTALL) -d $(dir $@)
	$(compile.S)
	$(Q)$(STRIPTOOL) -x -R .note -R .comment $@

ifeq ($(UCLIBC_CTOR_DTOR),y)
CTOR_TARGETS=$(top_builddir)lib/crti.o $(top_builddir)lib/crtn.o
else
CTOR_TARGETS:=
endif

ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
CRTRELOC=$(top_builddir)lib/crtreloc.o
$(CRTRELOC): $(top_builddir)lib/%.o : $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/%.c
	$(Q)$(INSTALL) -d $(dir $@)
	$(compile.c)
endif

ifneq ($(wildcard $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/initfini.c),)
CFLAGS-initfini.s := -S -g0 $(PICFLAG) -fno-inline-functions -finhibit-size-directive
$(top_builddir)lib/initfini.s: $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/initfini.c
	$(compile.c)

$(top_builddir)lib/defs.h: $(top_builddir)lib/initfini.s
	$(Q)sed -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< | \
		gawk -f $(top_srcdir)extra/scripts/defs.awk > $@.tmp
	$(Q)mv $@.tmp $@

$(top_builddir)lib/crti.S: $(top_builddir)lib/initfini.s $(top_builddir)lib/defs.h
	$(Q)sed -n -e '1,/@HEADER_ENDS/p' \
		-e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
		-e '/@TRAILER_BEGINS/,$$p' $< > $@

$(top_builddir)lib/crtn.S: $(top_builddir)lib/initfini.s
	$(Q)sed -n -e '1,/@HEADER_ENDS/p' \
		-e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
		-e '/@TRAILER_BEGINS/,$$p' $< > $@

$(CTOR_TARGETS): $(top_builddir)lib/%.o : $(top_builddir)lib/%.S
	$(Q)$(INSTALL) -d $(dir $@)
	$(compile.S) $(PICFLAG) $(SSP_DISABLE_FLAGS)
else
$(CTOR_TARGETS): $(top_builddir)lib/%.o : $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/%.S
	$(Q)$(INSTALL) -d $(dir $@)
	$(compile.S) $(PICFLAG) $(SSP_DISABLE_FLAGS)
endif

#ifeq ($(TARGET_ARCH),nios)
#CRTS_COMPAT := $(top_builddir)lib/crt0.o
#$(CRTS_COMPAT):
#	ln -fs crt1.o $(top_builddir)lib/crt0.o
#else
CRTS_COMPAT :=
#endif

$(crt-y): $(CRTS) $(CTOR_TARGETS) $(CRTS_COMPAT) $(CRTRELOC)
$(CRTS) $(CTOR_TARGETS) $(CRTS_COMPAT) $(CRTRELOC): | headers

$(top_builddir)lib/$(NONSHARED_LIBNAME): $(libc-nonshared-y)
	$(Q)$(INSTALL) -d $(dir $@)
	$(Q)$(RM) $@
	$(do_ar)

$(top_builddir)lib/libpthread_nonshared.a: $(libpthread-nonshared-y)
	$(Q)$(INSTALL) -d $(dir $@)
	$(Q)$(RM) $@
	$(do_ar)

files.dep := $(libc-a-y) $(libc-so-y) $(libc-nonshared-y) \
	$(libm-a-y) $(libm-so-y) \
	$(libpthread-a-y) $(libpthread-so-y) $(libpthread-nonshared-y) \
	$(libthread_db-a-y) $(libthread_db-so-y) \
	$(librt-a-y) $(librt-so-y)  $(libresolv-a-y) $(libresolv-so-y) \
	$(libcrypt-a-y) $(libcrypt-so-y) $(libutil-a-y) $(libutil-so-y) \
	$(libnsl-a-y) $(libnsl-so-y) $(ldso-y) $(libdl-a-y) $(libdl-so-y)
.depends.dep := \
	$(patsubst %.o,%.o.dep,$(filter %.o,$(files.dep))) \
	$(patsubst %.os,%.os.dep,$(filter %.os,$(files.dep))) \
	$(patsubst %.oS,%.oS.dep,$(filter %.oS,$(files.dep)))
# Oh, and prepend a dot to the basename so i don't have to change my habit of
# calling 'size thefile.o*'
.depends.dep := $(foreach f,$(.depends.dep),$(dir $(f)).$(notdir $(f)))
.depends.dep := $(wildcard $(.depends.dep))

FORCE:

clean: objclean-y headers_clean-y
realclean: clean
	$(Q)$(RM) $(.depends.dep)

objclean-y: $(objclean-y)
headers_clean-y: $(headers_clean-y)

ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
ifneq ($(strip $(.depends.dep)),)
.NOEXPORT:
-include $(.depends.dep)
endif
endif

# vi: ft=make :