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platform_build/core/combo/TARGET_linux-mips.mk
Dan Albert e088c0d281 Refactor transform-o-to-* definitions. 
Previously, there was one generic definition for each of the
transform-o-to-* functions in definitions.mk, and one target specific
one in each combo/TARGET_*.mk. The generic one was entirely unused,
and the target specific ones were all nearly identical.

Changing anything in these functions was tedious at best, and often
error prone. The differences between any 32-bit arch and its 64-bit
equivalent were restricted to the name of the linker, and the ARM and
MIPS definitions were identical. The few differences between ARM and
x86 looked to be compatibility for an old (ca. 2008) toolchain issue
with --gc-sections, and a bug (LDFLAGS coming first rather than
later).

To simplify things, I've moved the definitions for these out of
combo/TARGET_*.mk and back into definitions.mk. The differences
between ARM and x86 have been scrapped. Anything that really does
still need to be target specific can be handled as I have the linker:
add a TARGET_FOO variable to the given target and then add it to the
generic definition.

Change-Id: I54dc1bffc32ac39f27f0b87247dd6a6dbaf0b162
2014-11-13 16:21:46 -08:00

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Makefile
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#
# Copyright (C) 2010 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Configuration for Linux on MIPS.
# Included by combo/select.mk
# You can set TARGET_ARCH_VARIANT to use an arch version other
# than mips32r2-fp. Each value should correspond to a file named
# $(BUILD_COMBOS)/arch/<name>.mk which must contain
# makefile variable definitions similar to the preprocessor
# defines in build/core/combo/include/arch/<combo>/AndroidConfig.h. Their
# purpose is to allow module Android.mk files to selectively compile
# different versions of code based upon the funtionality and
# instructions available in a given architecture version.
#
# The blocks also define specific arch_variant_cflags, which
# include defines, and compiler settings for the given architecture
# version.
#
ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),)
TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := mips32r2-fp
endif
# Decouple NDK library selection with platform compiler version
$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.8
ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.9
else
$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
endif
TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk
ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
$(error Unknown MIPS architecture variant: $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT))
endif
include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
include $(BUILD_SYSTEM)/combo/fdo.mk
# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),)
$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/mips/mips64el-linux-android-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)
$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/mips64el-linux-android-
endif
$(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_READELF := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
TARGET_mips_CFLAGS := -O2 \
-fomit-frame-pointer \
-fno-strict-aliasing \
-funswitch-loops
# Set FORCE_MIPS_DEBUGGING to "true" in your buildspec.mk
# or in your environment to gdb debugging easier.
# Don't forget to do a clean build.
ifeq ($(FORCE_MIPS_DEBUGGING),true)
TARGET_mips_CFLAGS += -fno-omit-frame-pointer
endif
android_config_h := $(call select-android-config-h,linux-mips)
$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \
$(TARGET_mips_CFLAGS) \
-U__unix -U__unix__ -Umips \
-ffunction-sections \
-fdata-sections \
-funwind-tables \
-Wa,--noexecstack \
-Werror=format-security \
-D_FORTIFY_SOURCE=2 \
-no-canonical-prefixes \
-fno-canonical-system-headers \
$(arch_variant_cflags) \
-include $(android_config_h) \
-I $(dir $(android_config_h))
ifneq ($(ARCH_MIPS_PAGE_SHIFT),)
$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -DPAGE_SHIFT=$(ARCH_MIPS_PAGE_SHIFT)
endif
$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += \
-Wl,-z,noexecstack \
-Wl,-z,relro \
-Wl,-z,now \
-Wl,--warn-shared-textrel \
-Wl,--fatal-warnings \
$(arch_variant_ldflags)
$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
# More flags/options can be added here
$(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS := \
-DNDEBUG \
-g \
-Wstrict-aliasing=2 \
-fgcse-after-reload \
-frerun-cse-after-loop \
-frename-registers
libc_root := bionic/libc
libm_root := bionic/libm
## on some hosts, the target cross-compiler is not available so do not run this command
ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),)
# We compile with the global cflags to ensure that
# any flags which affect libgcc are correctly taken
# into account.
$(combo_2nd_arch_prefix)TARGET_LIBGCC := \
$(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcc.a)
$(combo_2nd_arch_prefix)TARGET_LIBATOMIC := \
$(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libatomic.a)
LIBGCC_EH := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcc_eh.a)
ifneq ($(LIBGCC_EH),libgcc_eh.a)
$(combo_2nd_arch_prefix)TARGET_LIBGCC += $(LIBGCC_EH)
endif
$(combo_2nd_arch_prefix)TARGET_LIBGCOV := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
--print-file-name=libgcov.a)
endif
KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-mips # mips covers both mips and mips64.
KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
$(libc_root)/arch-mips/include \
$(libc_root)/include \
$(KERNEL_HEADERS) \
$(libm_root)/include \
$(libm_root)/include/mips \
$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
$(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
$(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker
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