TARGET_linux-arm.mk revision b6457c223b0d0a6fb2a1bd5f90844cd34cc7afbb 
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 $(TARGET_ARCH_VARIANT)),)
34TARGET_ARCH_VARIANT := armv5te
35endif
36
37ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
38TARGET_GCC_VERSION := 4.7
39else
40TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
41endif
42
43TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
44ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
45$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT))
46endif
47
48include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
49
50# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
51ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
52TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$(TARGET_GCC_VERSION)
53TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi-
54endif
55
56TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
57TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
58TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
59TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
60TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
61TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
62ifeq ($(TARGET_BUILD_VARIANT),user)
63    TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@
64else
65    TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ && \
66        $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@
67endif
68
69TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
70
71TARGET_arm_CFLAGS :=    -O2 \
72                        -fomit-frame-pointer \
73                        -fstrict-aliasing    \
74                        -funswitch-loops
75
76# Modules can choose to compile some source as thumb. As
77# non-thumb enabled targets are supported, this is treated
78# as a 'hint'. If thumb is not enabled, these files are just
79# compiled as ARM.
80ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true)
81TARGET_thumb_CFLAGS :=  -mthumb \
82                        -Os \
83                        -fomit-frame-pointer \
84                        -fno-strict-aliasing
85else
86TARGET_thumb_CFLAGS := $(TARGET_arm_CFLAGS)
87endif
88
89# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk
90# or in your environment to force a full arm build, even for
91# files that are normally built as thumb; this can make
92# gdb debugging easier.  Don't forget to do a clean build.
93#
94# NOTE: if you try to build a -O0 build with thumb, several
95# of the libraries (libpv, libwebcore, libkjs) need to be built
96# with -mlong-calls.  When built at -O0, those libraries are
97# too big for a thumb "BL <label>" to go from one end to the other.
98ifeq ($(FORCE_ARM_DEBUGGING),true)
99  TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing
100  TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer
101endif
102
103TARGET_GLOBAL_CFLAGS += \
104			-msoft-float -fpic -fPIE \
105			-ffunction-sections \
106			-fdata-sections \
107			-funwind-tables \
108			-fstack-protector \
109			-Wa,--noexecstack \
110			-Werror=format-security \
111			-D_FORTIFY_SOURCE=1 \
112			-fno-short-enums \
113			$(arch_variant_cflags)
114
115android_config_h := $(call select-android-config-h,linux-arm)
116TARGET_ANDROID_CONFIG_CFLAGS := -include $(android_config_h) -I $(dir $(android_config_h))
117TARGET_GLOBAL_CFLAGS += $(TARGET_ANDROID_CONFIG_CFLAGS)
118
119# This warning causes dalvik not to build with gcc 4.6+ and -Werror.
120# We cannot turn it off blindly since the option is not available
121# in gcc-4.4.x.  We also want to disable sincos optimization globally
122# by turning off the builtin sin function.
123ifneq ($(filter 4.6 4.6.% 4.7 4.7.%, $(TARGET_GCC_VERSION)),)
124TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable -fno-builtin-sin \
125			-fno-strict-volatile-bitfields
126endif
127
128# This is to avoid the dreaded warning compiler message:
129#   note: the mangling of 'va_list' has changed in GCC 4.4
130#
131# The fact that the mangling changed does not affect the NDK ABI
132# very fortunately (since none of the exposed APIs used va_list
133# in their exported C++ functions). Also, GCC 4.5 has already
134# removed the warning from the compiler.
135#
136TARGET_GLOBAL_CFLAGS += -Wno-psabi
137
138TARGET_GLOBAL_LDFLAGS += \
139			-Wl,-z,noexecstack \
140			-Wl,-z,relro \
141			-Wl,-z,now \
142			-Wl,--warn-shared-textrel \
143			-Wl,--fatal-warnings \
144			-Wl,--icf=safe \
145			$(arch_variant_ldflags)
146
147# We only need thumb interworking in cases where thumb support
148# is available in the architecture, and just to be sure, (and
149# since sometimes thumb-interwork appears to be default), we
150# specifically disable when thumb support is unavailable.
151ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true)
152TARGET_GLOBAL_CFLAGS += -mthumb-interwork
153else
154TARGET_GLOBAL_CFLAGS += -mno-thumb-interwork
155endif
156
157TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
158
159# More flags/options can be added here
160TARGET_RELEASE_CFLAGS := \
161			-DNDEBUG \
162			-g \
163			-Wstrict-aliasing=2 \
164			-fgcse-after-reload \
165			-frerun-cse-after-loop \
166			-frename-registers
167
168libc_root := bionic/libc
169libm_root := bionic/libm
170libstdc++_root := bionic/libstdc++
171libthread_db_root := bionic/libthread_db
172
173
174## on some hosts, the target cross-compiler is not available so do not run this command
175ifneq ($(wildcard $(TARGET_CC)),)
176# We compile with the global cflags to ensure that
177# any flags which affect libgcc are correctly taken
178# into account.
179TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name)
180target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
181        -print-file-name=libgcov.a)
182endif
183
184# Define FDO (Feedback Directed Optimization) options.
185
186TARGET_FDO_CFLAGS:=
187TARGET_FDO_LIB:=
188
189ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
190  # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
191  # The profile will be generated on /data/local/tmp/profile on the device.
192  TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
193  TARGET_FDO_LIB := $(target_libgcov)
194else
195  # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
196  # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
197  ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
198    TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
199  else
200    ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
201      $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
202    endif
203  endif
204
205  # If the FDO profile directory can't be found, then FDO is off.
206  ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
207    TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
208    TARGET_FDO_LIB := $(target_libgcov)
209  endif
210endif
211
212
213# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use
214# symlinks located in out/ to point to the appropriate kernel
215# headers. see 'config/kernel_headers.make' for more details
216#
217ifneq ($(CUSTOM_KERNEL_HEADERS),)
218    KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS)
219    KERNEL_HEADERS_ARCH   := $(CUSTOM_KERNEL_HEADERS)
220else
221    KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common
222    KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/arch-$(TARGET_ARCH)
223endif
224KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
225
226TARGET_C_INCLUDES := \
227	$(libc_root)/arch-arm/include \
228	$(libc_root)/include \
229	$(libstdc++_root)/include \
230	$(KERNEL_HEADERS) \
231	$(libm_root)/include \
232	$(libm_root)/include/arm \
233	$(libthread_db_root)/include
234
235TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
236TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
237TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
238
239TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
240TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
241
242TARGET_STRIP_MODULE:=true
243
244TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
245
246TARGET_CUSTOM_LD_COMMAND := true
247
248define transform-o-to-shared-lib-inner
249$(hide) $(PRIVATE_CXX) \
250	-nostdlib -Wl,-soname,$(notdir $@) \
251	-Wl,--gc-sections \
252	-Wl,-shared,-Bsymbolic \
253	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
254	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
255	$(PRIVATE_ALL_OBJECTS) \
256	-Wl,--whole-archive \
257	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
258	-Wl,--no-whole-archive \
259	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
260	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
261	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
262	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
263	-o $@ \
264	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
265	$(PRIVATE_LDFLAGS) \
266	$(PRIVATE_TARGET_FDO_LIB) \
267	$(PRIVATE_TARGET_LIBGCC) \
268	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
269endef
270
271define transform-o-to-executable-inner
272$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \
273	-Wl,-dynamic-linker,/system/bin/linker \
274	-Wl,--gc-sections \
275	-Wl,-z,nocopyreloc \
276	-o $@ \
277	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
278	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
279	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
280	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
281	$(PRIVATE_ALL_OBJECTS) \
282	-Wl,--whole-archive \
283	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
284	-Wl,--no-whole-archive \
285	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
286	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
287	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
288	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
289	$(PRIVATE_LDFLAGS) \
290	$(PRIVATE_TARGET_FDO_LIB) \
291	$(PRIVATE_TARGET_LIBGCC) \
292	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
293endef
294
295define transform-o-to-static-executable-inner
296$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \
297	-Wl,--gc-sections \
298	-o $@ \
299	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
300	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \
301	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
302	$(PRIVATE_LDFLAGS) \
303	$(PRIVATE_ALL_OBJECTS) \
304	-Wl,--whole-archive \
305	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
306	-Wl,--no-whole-archive \
307	$(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
308	-Wl,--start-group \
309	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
310	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
311	$(PRIVATE_TARGET_FDO_LIB) \
312	$(PRIVATE_TARGET_LIBGCC) \
313	-Wl,--end-group \
314	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
315endef
316