core/combo/linux-arm.mk

   1 # Configuration for Linux on ARM.
   2 # Included by combo/select.make
   3
   4 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
   5 ifeq ($(strip $($(combo_target)TOOLS_PREFIX)),)
   6 $(combo_target)TOOLS_PREFIX := \
   7         prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-eabi-4.2.1/bin/arm-eabi-
   8 endif
   9
  10 $(combo_target)CC := $($(combo_target)TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
  11 $(combo_target)CXX := $($(combo_target)TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
  12 $(combo_target)AR := $($(combo_target)TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
  13 $(combo_target)OBJCOPY := $($(combo_target)TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
  14 $(combo_target)LD := $($(combo_target)TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
  15
  16 $(combo_target)NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
  17
  18 TARGET_arm_CFLAGS :=    -O2 \
  19                         -fomit-frame-pointer \
  20                         -fstrict-aliasing    \
  21                         -funswitch-loops     \
  22                         -finline-limit=300
  23
  24 TARGET_thumb_CFLAGS :=  -mthumb \
  25                         -Os \
  26                         -fomit-frame-pointer \
  27                         -fno-strict-aliasing \
  28                         -finline-limit=64
  29
  30 # Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk
  31 # or in your environment to force a full arm build, even for
  32 # files that are normally built as thumb; this can make
  33 # gdb debugging easier.  Don't forget to do a clean build.
  34 #
  35 # NOTE: if you try to build a -O0 build with thumb, several
  36 # of the libraries (libpv, libwebcore, libkjs) need to be built
  37 # with -mlong-calls.  When built at -O0, those libraries are
  38 # too big for a thumb "BL <label>" to go from one end to the other.
  39 ifeq ($(FORCE_ARM_DEBUGGING),true)
  40   TARGET_arm_CFLAGS += -fno-omit-frame-pointer
  41   TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer
  42 endif
  43
  44 ## on some hosts, the target cross-compiler is not available so do not run this command
  45 ifneq ($(wildcard $($(combo_target)CC)),)
  46 $(combo_target)LIBGCC := $(shell $($(combo_target)CC) -mthumb-interwork -print-libgcc-file-name)
  47 endif
  48
  49 $(combo_target)GLOBAL_CFLAGS += \
  50                         -march=armv5te -mtune=xscale \
  51                         -msoft-float -fpic \
  52                         -mthumb-interwork \
  53                         -ffunction-sections \
  54                         -funwind-tables \
  55                         -fstack-protector \
  56                         -fno-short-enums \
  57                         -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ \
  58                         -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ \
  59                         -include $(call select-android-config-h,linux-arm)
  60
  61 $(combo_target)GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
  62
  63 $(combo_target)RELEASE_CFLAGS := \
  64                         -DSK_RELEASE -DNDEBUG \
  65                         -g \
  66                         -Wstrict-aliasing=2 \
  67                         -finline-functions \
  68                         -fno-inline-functions-called-once \
  69                         -fgcse-after-reload \
  70                         -frerun-cse-after-loop \
  71                         -frename-registers
  72
  73 libc_root := bionic/libc
  74 libm_root := bionic/libm
  75 libstdc++_root := bionic/libstdc++
  76 libthread_db_root := bionic/libthread_db
  77
  78 # unless CUSTOM_KERNEL_HEADERS is defined, we're going to use
  79 # symlinks located in out/ to point to the appropriate kernel
  80 # headers. see 'config/kernel_headers.make' for more details
  81 #
  82 ifneq ($(CUSTOM_KERNEL_HEADERS),)
  83     KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS)
  84     KERNEL_HEADERS_ARCH   := $(CUSTOM_KERNEL_HEADERS)
  85 else
  86     KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common
  87     KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/arch-$(TARGET_ARCH)
  88 endif
  89 KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
  90
  91 $(combo_target)C_INCLUDES := \
  92         $(libc_root)/arch-arm/include \
  93         $(libc_root)/include \
  94         $(libstdc++_root)/include \
  95         $(KERNEL_HEADERS) \
  96         $(libm_root)/include \
  97         $(libm_root)/include/arch/arm \
  98         $(libthread_db_root)/include
  99
 100 TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o
 101 TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o
 102 TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o
 103
 104 TARGET_STRIP_MODULE:=true
 105
 106 $(combo_target)DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
 107
 108 $(combo_target)CUSTOM_LD_COMMAND := true
 109 define transform-o-to-shared-lib-inner
 110 $(TARGET_CXX) \
 111         -nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \
 112         -Wl,--gc-sections \
 113         -Wl,-shared,-Bsymbolic \
 114         $(TARGET_GLOBAL_LD_DIRS) \
 115         $(PRIVATE_ALL_OBJECTS) \
 116         -Wl,--whole-archive \
 117         $(call normalize-host-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 118         -Wl,--no-whole-archive \
 119         $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 120         $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
 121         -o $@ \
 122         $(PRIVATE_LDFLAGS) \
 123         $(TARGET_LIBGCC)
 124 endef
 125
 126 define transform-o-to-executable-inner
 127 $(TARGET_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
 128         -Wl,-dynamic-linker,/system/bin/linker \
 129     -Wl,--gc-sections \
 130         -Wl,-z,nocopyreloc \
 131         -o $@ \
 132         $(TARGET_GLOBAL_LD_DIRS) \
 133         -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 134         $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
 135         $(TARGET_CRTBEGIN_DYNAMIC_O) \
 136         $(PRIVATE_ALL_OBJECTS) \
 137         $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 138         $(PRIVATE_LDFLAGS) \
 139         $(TARGET_LIBGCC) \
 140         $(TARGET_CRTEND_O)
 141 endef
 142
 143 define transform-o-to-static-executable-inner
 144 $(TARGET_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
 145     -Wl,--gc-sections \
 146         -o $@ \
 147         $(TARGET_GLOBAL_LD_DIRS) \
 148         $(TARGET_CRTBEGIN_STATIC_O) \
 149         $(PRIVATE_LDFLAGS) \
 150         $(PRIVATE_ALL_OBJECTS) \
 151         $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 152         $(TARGET_LIBGCC) \
 153         $(TARGET_CRTEND_O)
 154 endef