1#
2# Copyright (C) 2006 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# $(BUILD_COMBOS)/arch/<name>.mk which must contain
23# makefile variable definitions similar to the preprocessor
24# defines in build/core/combo/include/arch/<combo>/AndroidConfig.h. Their
25# purpose is to allow module Android.mk files to selectively compile
26# different versions of code based upon the funtionality and
27# instructions available in a given architecture version.
28#
29# The blocks also define specific arch_variant_cflags, which
30# include defines, and compiler settings for the given architecture
31# version.
32#
33ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),)
34TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := armv5te
35endif
36
37# Decouple NDK library selection with platform compiler version
38$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.8
39
40ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
41$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.8
42else
43$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
44endif
45
46TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk
47ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
48$(error Unknown ARM architecture version: $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT))
49endif
50
51include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
52include $(BUILD_SYSTEM)/combo/fdo.mk
53
54# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
55ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),)
56$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)
57$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi-
58endif
59
60$(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
61$(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
62$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
63$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
64$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
65$(combo_2nd_arch_prefix)TARGET_READELF := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
66$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
67
68$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
69
70$(combo_2nd_arch_prefix)TARGET_arm_CFLAGS :=    -O2 \
71                        -fomit-frame-pointer \
72                        -fstrict-aliasing    \
73                        -funswitch-loops
74
75# Modules can choose to compile some source as thumb.
76$(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS :=  -mthumb \
77                        -Os \
78                        -fomit-frame-pointer \
79                        -fno-strict-aliasing
80
81# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk
82# or in your environment to force a full arm build, even for
83# files that are normally built as thumb; this can make
84# gdb debugging easier.  Don't forget to do a clean build.
85#
86# NOTE: if you try to build a -O0 build with thumb, several
87# of the libraries (libpv, libwebcore, libkjs) need to be built
88# with -mlong-calls.  When built at -O0, those libraries are
89# too big for a thumb "BL <label>" to go from one end to the other.
90ifeq ($(FORCE_ARM_DEBUGGING),true)
91  $(combo_2nd_arch_prefix)TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing
92  $(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer
93endif
94
95android_config_h := $(call select-android-config-h,linux-arm)
96
97$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \
98			-msoft-float \
99			-ffunction-sections \
100			-fdata-sections \
101			-funwind-tables \
102			-fstack-protector \
103			-Wa,--noexecstack \
104			-Werror=format-security \
105			-D_FORTIFY_SOURCE=2 \
106			-fno-short-enums \
107			-no-canonical-prefixes \
108			-fno-canonical-system-headers \
109			$(arch_variant_cflags) \
110			-include $(android_config_h) \
111			-I $(dir $(android_config_h))
112
113# The "-Wunused-but-set-variable" option often breaks projects that enable
114# "-Wall -Werror" due to a commom idiom "ALOGV(mesg)" where ALOGV is turned
115# into no-op in some builds while mesg is defined earlier. So we explicitly
116# disable "-Wunused-but-set-variable" here.
117ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8, $($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)),)
118$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -fno-builtin-sin \
119			-fno-strict-volatile-bitfields
120endif
121
122# This is to avoid the dreaded warning compiler message:
123#   note: the mangling of 'va_list' has changed in GCC 4.4
124#
125# The fact that the mangling changed does not affect the NDK ABI
126# very fortunately (since none of the exposed APIs used va_list
127# in their exported C++ functions). Also, GCC 4.5 has already
128# removed the warning from the compiler.
129#
130$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -Wno-psabi
131
132$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += \
133			-Wl,-z,noexecstack \
134			-Wl,-z,relro \
135			-Wl,-z,now \
136			-Wl,--warn-shared-textrel \
137			-Wl,--fatal-warnings \
138			-Wl,--icf=safe \
139			$(arch_variant_ldflags)
140
141$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -mthumb-interwork
142
143$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
144
145# More flags/options can be added here
146$(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS := \
147			-DNDEBUG \
148			-g \
149			-Wstrict-aliasing=2 \
150			-fgcse-after-reload \
151			-frerun-cse-after-loop \
152			-frename-registers
153
154libc_root := bionic/libc
155libm_root := bionic/libm
156libstdc++_root := bionic/libstdc++
157
158
159## on some hosts, the target cross-compiler is not available so do not run this command
160ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),)
161# We compile with the global cflags to ensure that
162# any flags which affect libgcc are correctly taken
163# into account.
164$(combo_2nd_arch_prefix)TARGET_LIBGCC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \
165        $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name)
166$(combo_2nd_arch_prefix)TARGET_LIBATOMIC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \
167        $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libatomic.a)
168endif
169
170KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
171KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/uapi/asm-$(TARGET_$(combo_2nd_arch_prefix)ARCH)
172KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
173
174$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
175	$(libc_root)/arch-arm/include \
176	$(libc_root)/include \
177	$(libstdc++_root)/include \
178	$(KERNEL_HEADERS) \
179	$(libm_root)/include \
180	$(libm_root)/include/arm \
181
182$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
183$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
184$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
185
186$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
187$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
188
189$(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
190
191$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
192
193$(combo_2nd_arch_prefix)TARGET_CUSTOM_LD_COMMAND := true
194
195define $(combo_2nd_arch_prefix)transform-o-to-shared-lib-inner
196$(hide) $(PRIVATE_CXX) \
197	-nostdlib -Wl,-soname,$(notdir $@) \
198	-Wl,--gc-sections \
199	$(if $(filter true,$(PRIVATE_CLANG)),-shared,-Wl,-shared) \
200	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
201	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
202	$(PRIVATE_ALL_OBJECTS) \
203	-Wl,--whole-archive \
204	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
205	-Wl,--no-whole-archive \
206	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
207	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
208	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
209	$(if $(TARGET_BUILD_APPS),$(PRIVATE_TARGET_LIBGCC)) \
210	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
211	-o $@ \
212	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
213	$(PRIVATE_LDFLAGS) \
214	$(PRIVATE_TARGET_LIBATOMIC) \
215	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
216	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \
217	$(PRIVATE_LDLIBS)
218endef
219
220define $(combo_2nd_arch_prefix)transform-o-to-executable-inner
221$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -pie \
222	-Wl,-dynamic-linker,/system/bin/linker \
223	-Wl,--gc-sections \
224	-Wl,-z,nocopyreloc \
225	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
226	-Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \
227	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
228	$(PRIVATE_ALL_OBJECTS) \
229	-Wl,--whole-archive \
230	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
231	-Wl,--no-whole-archive \
232	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
233	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
234	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
235	$(if $(TARGET_BUILD_APPS),$(PRIVATE_TARGET_LIBGCC)) \
236	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
237	-o $@ \
238	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
239	$(PRIVATE_LDFLAGS) \
240	$(PRIVATE_TARGET_LIBATOMIC) \
241	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
242	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
243	$(PRIVATE_LDLIBS)
244endef
245
246define $(combo_2nd_arch_prefix)transform-o-to-static-executable-inner
247$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \
248	-Wl,--gc-sections \
249	-o $@ \
250	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
251	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \
252	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
253	$(PRIVATE_LDFLAGS) \
254	$(PRIVATE_ALL_OBJECTS) \
255	-Wl,--whole-archive \
256	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
257	-Wl,--no-whole-archive \
258	$(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
259	-Wl,--start-group \
260	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
261	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
262	$(PRIVATE_TARGET_LIBATOMIC) \
263	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
264	-Wl,--end-group \
265	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
266endef
267