TARGET_linux-arm.mk revision 1a08100fa9d92c25de32ba4d13fd3958bbcab894 
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# $(BUILD_COMBOS)/arch/<name>.mk which must contain
23# makefile variable definitions similar to the preprocessor
24# defines in system/core/include/arch/<combo>/AndroidConfig.h. Their
25# purpose is to allow module Android.mk files to selectively compile
26# different versions of code based upon the funtionality and
27# instructions available in a given architecture version.
28#
29# The blocks also define specific arch_variant_cflags, which
30# include defines, and compiler settings for the given architecture
31# version.
32#
33ifeq ($(strip $(TARGET_ARCH_VARIANT)),)
34TARGET_ARCH_VARIANT := armv5te
35endif
36
37TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
38ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
39$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT))
40endif
41
42include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
43
44# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
45ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
46TARGET_TOOLS_PREFIX := \
47	prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-eabi-4.4.0/bin/arm-eabi-
48endif
49
50TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
51TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
52TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
53TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
54TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
55
56TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
57
58TARGET_arm_CFLAGS :=    -O2 \
59                        -fomit-frame-pointer \
60                        -fstrict-aliasing    \
61                        -funswitch-loops     \
62                        -finline-limit=300
63
64# Modules can choose to compile some source as thumb. As
65# non-thumb enabled targets are supported, this is treated
66# as a 'hint'. If thumb is not enabled, these files are just
67# compiled as ARM.
68ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true)
69TARGET_thumb_CFLAGS :=  -mthumb \
70                        -Os \
71                        -fomit-frame-pointer \
72                        -fno-strict-aliasing \
73                        -finline-limit=64
74else
75TARGET_thumb_CFLAGS := $(TARGET_arm_CFLAGS)
76endif
77
78# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk
79# or in your environment to force a full arm build, even for
80# files that are normally built as thumb; this can make
81# gdb debugging easier.  Don't forget to do a clean build.
82#
83# NOTE: if you try to build a -O0 build with thumb, several
84# of the libraries (libpv, libwebcore, libkjs) need to be built
85# with -mlong-calls.  When built at -O0, those libraries are
86# too big for a thumb "BL <label>" to go from one end to the other.
87ifeq ($(FORCE_ARM_DEBUGGING),true)
88  TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing
89  TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer
90endif
91
92android_config_h := $(call select-android-config-h,linux-arm)
93arch_include_dir := $(dir $(android_config_h))
94
95TARGET_GLOBAL_CFLAGS += \
96			-msoft-float -fpic \
97			-ffunction-sections \
98			-funwind-tables \
99			-fstack-protector \
100			-fno-short-enums \
101			$(arch_variant_cflags) \
102			-include $(android_config_h) \
103			-I $(arch_include_dir)
104
105TARGET_GLOBAL_LDFLAGS += \
106			$(arch_variant_ldflags)
107
108# We only need thumb interworking in cases where thumb support
109# is available in the architecture, and just to be sure, (and
110# since sometimes thumb-interwork appears to be default), we
111# specifically disable when thumb support is unavailable.
112ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true)
113TARGET_GLOBAL_CFLAGS +=	-mthumb-interwork
114else
115TARGET_GLOBAL_CFLAGS +=	-mno-thumb-interwork
116endif
117
118TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
119
120TARGET_RELEASE_CFLAGS := \
121			-DNDEBUG \
122			-g \
123			-Wstrict-aliasing=2 \
124			-finline-functions \
125			-fno-inline-functions-called-once \
126			-fgcse-after-reload \
127			-frerun-cse-after-loop \
128			-frename-registers
129
130libc_root := bionic/libc
131libm_root := bionic/libm
132libstdc++_root := bionic/libstdc++
133libthread_db_root := bionic/libthread_db
134
135
136## on some hosts, the target cross-compiler is not available so do not run this command
137ifneq ($(wildcard $(TARGET_CC)),)
138# We compile with the global cflags to ensure that
139# any flags which affect libgcc are correctly taken
140# into account.
141TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name)
142endif
143
144# Define FDO (Feedback Directed Optimization) options.
145
146TARGET_FDO_CFLAGS:=
147TARGET_FDO_LIB:=
148
149target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
150        --print-file-name=libgcov.a)
151ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
152  # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
153  # The profile will be generated on /data/local/tmp/profile on the device.
154  TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
155  TARGET_FDO_LIB := $(target_libgcov)
156else
157  # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
158  # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
159  ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
160    TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
161  else
162    ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
163      $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
164    endif
165  endif
166
167  # If the FDO profile directory can't be found, then FDO is off.
168  ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
169    TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
170    TARGET_FDO_LIB := $(target_libgcov)
171  endif
172endif
173
174
175# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use
176# symlinks located in out/ to point to the appropriate kernel
177# headers. see 'config/kernel_headers.make' for more details
178#
179ifneq ($(CUSTOM_KERNEL_HEADERS),)
180    KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS)
181    KERNEL_HEADERS_ARCH   := $(CUSTOM_KERNEL_HEADERS)
182else
183    KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common
184    KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/arch-$(TARGET_ARCH)
185endif
186KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
187
188TARGET_C_INCLUDES := \
189	$(libc_root)/arch-arm/include \
190	$(libc_root)/include \
191	$(libstdc++_root)/include \
192	$(KERNEL_HEADERS) \
193	$(libm_root)/include \
194	$(libm_root)/include/arch/arm \
195	$(libthread_db_root)/include
196
197TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o
198TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o
199TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o
200
201TARGET_STRIP_MODULE:=true
202
203TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
204
205TARGET_CUSTOM_LD_COMMAND := true
206
207# Enable the Dalvik JIT compiler if not already specified.
208ifeq ($(strip $(WITH_JIT)),)
209    WITH_JIT := true
210endif
211
212define transform-o-to-shared-lib-inner
213$(TARGET_CXX) \
214	-nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \
215	-Wl,--gc-sections \
216	-Wl,-shared,-Bsymbolic \
217	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
218	$(PRIVATE_ALL_OBJECTS) \
219	-Wl,--whole-archive \
220	$(call normalize-host-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
221	-Wl,--no-whole-archive \
222	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
223	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
224	-o $@ \
225	$(PRIVATE_LDFLAGS) \
226	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
227	$(PRIVATE_TARGET_FDO_LIB) \
228	$(PRIVATE_TARGET_LIBGCC)
229endef
230
231define transform-o-to-executable-inner
232$(TARGET_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
233	-Wl,-dynamic-linker,/system/bin/linker \
234    -Wl,--gc-sections \
235	-Wl,-z,nocopyreloc \
236	-o $@ \
237	$(TARGET_GLOBAL_LD_DIRS) \
238	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
239	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
240	$(TARGET_CRTBEGIN_DYNAMIC_O) \
241	$(PRIVATE_ALL_OBJECTS) \
242	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
243	$(PRIVATE_LDFLAGS) \
244	$(TARGET_GLOBAL_LDFLAGS) \
245	$(TARGET_FDO_LIB) \
246	$(TARGET_LIBGCC) \
247	$(TARGET_CRTEND_O)
248endef
249
250define transform-o-to-static-executable-inner
251$(TARGET_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
252    -Wl,--gc-sections \
253	-o $@ \
254	$(TARGET_GLOBAL_LD_DIRS) \
255	$(TARGET_CRTBEGIN_STATIC_O) \
256	$(PRIVATE_LDFLAGS) \
257	$(TARGET_GLOBAL_LDFLAGS) \
258	$(PRIVATE_ALL_OBJECTS) \
259	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
260	$(TARGET_FDO_LIB) \
261	$(TARGET_LIBGCC) \
262	$(TARGET_CRTEND_O)
263endef
264