ldso/ldso/Makefile.in

   1 # Makefile for uClibc
   2 #
   3 # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
   4 #
   5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   6 #
   7
   8 subdirs += ldso/ldso/$(TARGET_ARCH)
   9
  10 CFLAGS-rtld := -DNOT_IN_libc -DIS_IN_rtld $(SSP_DISABLE_FLAGS)
  11
  12 ifneq ($(TARGET_ARCH),arc)
  13 # This stuff will not work with -fomit-frame-pointer
  14 CFLAGS-rtld += -fno-omit-frame-pointer
  15 endif
  16
  17 ifeq ($(DODEBUG),y)
  18 ifeq ($(TARGET_ARCH),arm)
  19 # This stuff will not work with -funwind-tables / -fasynchronous-unwind-tables
  20 CFLAGS-rtld += -fno-unwind-tables -fno-asynchronous-unwind-tables
  21 endif
  22 endif
  23
  24 CFLAGS-rtld += -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) -I$(top_srcdir)ldso/include -I$(top_srcdir)ldso/ldso
  25 CFLAGS-rtld += -DUCLIBC_RUNTIME_PREFIX=\"$(RUNTIME_PREFIX)\" -DUCLIBC_LDSO=\"$(UCLIBC_LDSO)\"
  26
  27 # Not really much point in including debugging info, since gdb
  28 # can't really debug ldso, since gdb requires help from ldso to
  29 # debug things....
  30 # On arm, gcc-4.3.x onwards -Os emits calls to libgcc, which calls _div0,
  31 # which tries to call raise(). And raise comes from libc so a catch 22.
  32 # Using -O2 instead. We could have use -fno-early-inlining with -Os too.
  33 CFLAGS-$(DODEBUG)-ldso/ldso := -O2 -g
  34
  35 CFLAGS-ldso.c := -DLDSO_ELFINTERP=\"$(TARGET_ARCH)/elfinterp.c\"
  36
  37 # Search non-default multilib directories
  38 ifneq ($(MULTILIB_DIR),lib)
  39 CFLAGS-ldso.c   += -DLDSO_MULTILIB_DIR=\"$(MULTILIB_DIR)\"
  40 endif
  41
  42 ifeq ($(TARGET_ARCH),arc)
  43 CFLAGS-ldso.c += -mno-long-calls
  44 endif
  45
  46 LDFLAGS-$(UCLIBC_FORMAT_DSBT_ELF)-$(UCLIBC_LDSO_NAME).so := -Wl,--dsbt-index=1
  47 ifneq ($(SUPPORT_LD_DEBUG),y)
  48 LDFLAGS-$(UCLIBC_LDSO_NAME).so := $(LDFLAGS)
  49 else
  50 LDFLAGS-$(UCLIBC_LDSO_NAME).so := $(LDFLAGS_NOSTRIP) -Wl,-z,defs
  51 endif
  52 LDFLAGS-$(UCLIBC_LDSO_NAME).so += -Wl,-e,$(SYMBOL_PREFIX)_start \
  53         -Wl,-z,now -Wl,-Bsymbolic \
  54         -Wl,--export-dynamic $(CFLAG_-Wl--sort-common) -Wl,--no-undefined
  55
  56 ifneq ($(DODEBUG),y)
  57         LDFLAGS-$(UCLIBC_LDSO_NAME).so +=  -Wl,--discard-locals $(CFLAG_-Wl--discard-all)
  58 endif
  59
  60 LDFLAGS-$(LDSO_PRELINK_SUPPORT)-$(UCLIBC_LDSO_NAME).so += -Wl,-defsym=$(SYMBOL_PREFIX)_begin=0
  61
  62 ldso_FULL_NAME := $(UCLIBC_LDSO_NAME)-$(VERSION).so
  63
  64 $(UCLIBC_LDSO_NAME)_DIR := $(top_srcdir)ldso/ldso
  65 $(UCLIBC_LDSO_NAME)_OUT := $(top_builddir)ldso/ldso
  66
  67 $(UCLIBC_LDSO_NAME)_CSRC := $($(UCLIBC_LDSO_NAME)_DIR)/ldso.c
  68 # prerequesites
  69 $($(UCLIBC_LDSO_NAME)_OUT)/ldso.o $($(UCLIBC_LDSO_NAME)_OUT)/ldso.oS: \
  70         $($(UCLIBC_LDSO_NAME)_DIR)/dl-debug.c \
  71         $($(UCLIBC_LDSO_NAME)_DIR)/dl-startup.c \
  72         $($(UCLIBC_LDSO_NAME)_DIR)/dl-array.c \
  73         $($(UCLIBC_LDSO_NAME)_DIR)/dl-hash.c \
  74         $($(UCLIBC_LDSO_NAME)_DIR)/dl-elf.c
  75 $(UCLIBC_LDSO_NAME)_COBJ := $(patsubst $($(UCLIBC_LDSO_NAME)_DIR)/%.c,$($(UCLIBC_LDSO_NAME)_OUT)/%.o,$($(UCLIBC_LDSO_NAME)_CSRC))
  76
  77 $(UCLIBC_LDSO_NAME)_SSRC := $(wildcard $($(UCLIBC_LDSO_NAME)_DIR)/$(TARGET_ARCH)/*.S)
  78 $(UCLIBC_LDSO_NAME)_SOBJ := $(patsubst $($(UCLIBC_LDSO_NAME)_DIR)/$(TARGET_ARCH)/%.S,$($(UCLIBC_LDSO_NAME)_OUT)/$(TARGET_ARCH)/%.o,$($(UCLIBC_LDSO_NAME)_SSRC))
  79
  80 $(UCLIBC_LDSO_NAME)_OBJS := $($(UCLIBC_LDSO_NAME)_COBJ) $($(UCLIBC_LDSO_NAME)_SOBJ)
  81
  82 ldso-y := $($(UCLIBC_LDSO_NAME)_OBJS:.o=.oS)
  83
  84 lib-so-y += $(ldso)
  85 objclean-y += CLEAN_ldso/ldso
  86
  87 $(ldso): $(ldso:.$(ABI_VERSION)=)
  88 $(ldso:.$(ABI_VERSION)=): | $(top_builddir)lib
  89 $(ldso:.$(ABI_VERSION)=): $($(UCLIBC_LDSO_NAME)_OUT)/$(UCLIBC_LDSO_NAME)_so.a
  90         $(call link.so,$(ldso_FULL_NAME),$(ABI_VERSION))
  91         # link for backward compatibility
  92         (cd $(top_builddir)lib; ln -sf $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION) $(UCLIBC_LDSO_NAME).so.0 )
  93 ifeq ($(CONFIG_MIPS_NAN_2008),y)
  94         (cd $(top_builddir)lib; ln -sf $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION) $(UCLIBC_LDSO_NAME)-mipsn8.so.0)
  95 endif
  96
  97 $($(UCLIBC_LDSO_NAME)_OUT)/$(UCLIBC_LDSO_NAME)_so.a: $(ldso-y)
  98         $(Q)$(RM) $@
  99         $(do_ar)
 100
 101 CLEAN_ldso/ldso:
 102         $(do_rm) $(addprefix $($(UCLIBC_LDSO_NAME)_OUT)/,$(foreach e, o os oS a,$(foreach d, *. */*.,$(d)$(e))))