TARGET_linux-arm64.mk revision 43146118aab8e15e8ed4f859106d8ddccc06d21b 
1#
2# Copyright (C) 2013 The Android Open Source Project
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#      http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15#
16
17# Configuration for Linux on ARM.
18# Included by combo/select.mk
19
20# You can set TARGET_ARCH_VARIANT to use an arch version other
21# than ARMv5TE. Each value should correspond to a file named
22# $(BUILD_COMBOS)/arch/<name>.mk which must contain
23# makefile variable definitions. Their
24# purpose is to allow module Android.mk files to selectively compile
25# different versions of code based upon the funtionality and
26# instructions available in a given architecture version.
27#
28# The blocks also define specific arch_variant_cflags, which
29# include defines, and compiler settings for the given architecture
30# version.
31#
32ifeq ($(strip $(TARGET_ARCH_VARIANT)),)
33TARGET_ARCH_VARIANT := armv8
34endif
35
36# Decouple NDK library selection with platform compiler version
37TARGET_NDK_GCC_VERSION := 4.9
38
39ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
40TARGET_GCC_VERSION := 4.9
41else
42TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
43endif
44
45TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
46ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
47$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT))
48endif
49
50include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
51include $(BUILD_SYSTEM)/combo/fdo.mk
52
53# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
54ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
55TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/aarch64/aarch64-linux-android-$(TARGET_GCC_VERSION)
56TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/aarch64-linux-android-
57endif
58
59TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc
60TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++
61TARGET_AR := $(TARGET_TOOLS_PREFIX)ar
62TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy
63TARGET_LD := $(TARGET_TOOLS_PREFIX)ld
64TARGET_READELF := $(TARGET_TOOLS_PREFIX)readelf
65TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip
66
67TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
68
69TARGET_GLOBAL_CFLAGS += \
70    -fno-strict-aliasing \
71
72TARGET_GLOBAL_CFLAGS += \
73			-fstack-protector \
74			-ffunction-sections \
75			-fdata-sections \
76			-funwind-tables \
77			-Wa,--noexecstack \
78			-Werror=format-security \
79			-D_FORTIFY_SOURCE=2 \
80			-fno-short-enums \
81			-no-canonical-prefixes \
82			-fno-canonical-system-headers \
83			$(arch_variant_cflags) \
84
85# Help catch common 32/64-bit errors.
86TARGET_GLOBAL_CFLAGS += \
87    -Werror=pointer-to-int-cast \
88    -Werror=int-to-pointer-cast \
89    -Werror=implicit-function-declaration \
90
91TARGET_GLOBAL_CFLAGS += -fno-strict-volatile-bitfields
92
93# This is to avoid the dreaded warning compiler message:
94#   note: the mangling of 'va_list' has changed in GCC 4.4
95#
96# The fact that the mangling changed does not affect the NDK ABI
97# very fortunately (since none of the exposed APIs used va_list
98# in their exported C++ functions). Also, GCC 4.5 has already
99# removed the warning from the compiler.
100#
101TARGET_GLOBAL_CFLAGS += -Wno-psabi
102
103TARGET_GLOBAL_LDFLAGS += \
104			-Wl,-z,noexecstack \
105			-Wl,-z,relro \
106			-Wl,-z,now \
107			-Wl,--build-id=md5 \
108			-Wl,--warn-shared-textrel \
109			-Wl,--fatal-warnings \
110			-Wl,-maarch64linux \
111			-Wl,--hash-style=gnu \
112			-Wl,--fix-cortex-a53-843419 \
113			$(arch_variant_ldflags)
114
115# Disable transitive dependency library symbol resolving.
116TARGET_GLOBAL_LDFLAGS += -Wl,--allow-shlib-undefined
117
118TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
119
120# More flags/options can be added here
121TARGET_RELEASE_CFLAGS := \
122			-DNDEBUG \
123			-O2 -g \
124			-Wstrict-aliasing=2 \
125			-fgcse-after-reload \
126			-frerun-cse-after-loop \
127			-frename-registers
128
129libc_root := bionic/libc
130libm_root := bionic/libm
131
132TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
133	-print-libgcc-file-name)
134TARGET_LIBATOMIC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
135	-print-file-name=libatomic.a)
136TARGET_LIBGCOV := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
137	-print-file-name=libgcov.a)
138
139KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
140KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH)
141KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
142
143TARGET_C_INCLUDES := \
144	$(libc_root)/arch-arm64/include \
145	$(libc_root)/include \
146	$(KERNEL_HEADERS) \
147	$(libm_root)/include \
148	$(libm_root)/include/arm64 \
149
150TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
151TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
152TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
153
154TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
155TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
156
157TARGET_PACK_MODULE_RELOCATIONS := true
158
159TARGET_LINKER := /system/bin/linker64
160