TARGET_linux-arm.mk revision c639c787a0932b230be0d991941ce26c0faea81b 
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-4.4.3/bin/arm-eabi-
48endif
49
50# Only define these if there's actually a gcc in there.
51# The gcc toolchain does not exists for windows/cygwin. In this case, do not reference it.
52ifneq ($(wildcard $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)),)
53    TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
54    TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
55    TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
56    TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
57    TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
58    TARGET_STRIP := $(HOST_OUT_EXECUTABLES)/soslim$(HOST_EXECUTABLE_SUFFIX)
59    TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip --shady --quiet $< --outfile $@
60endif
61
62TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
63
64TARGET_arm_CFLAGS :=    -O2 \
65                        -fomit-frame-pointer \
66                        -fstrict-aliasing    \
67                        -funswitch-loops     \
68                        -finline-limit=300
69
70# Modules can choose to compile some source as thumb. As
71# non-thumb enabled targets are supported, this is treated
72# as a 'hint'. If thumb is not enabled, these files are just
73# compiled as ARM.
74ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true)
75TARGET_thumb_CFLAGS :=  -mthumb \
76                        -Os \
77                        -fomit-frame-pointer \
78                        -fno-strict-aliasing \
79                        -finline-limit=64
80else
81TARGET_thumb_CFLAGS := $(TARGET_arm_CFLAGS)
82endif
83
84# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk
85# or in your environment to force a full arm build, even for
86# files that are normally built as thumb; this can make
87# gdb debugging easier.  Don't forget to do a clean build.
88#
89# NOTE: if you try to build a -O0 build with thumb, several
90# of the libraries (libpv, libwebcore, libkjs) need to be built
91# with -mlong-calls.  When built at -O0, those libraries are
92# too big for a thumb "BL <label>" to go from one end to the other.
93ifeq ($(FORCE_ARM_DEBUGGING),true)
94  TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing
95  TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer
96endif
97
98android_config_h := $(call select-android-config-h,linux-arm)
99arch_include_dir := $(dir $(android_config_h))
100
101TARGET_GLOBAL_CFLAGS += \
102			-msoft-float -fpic \
103			-ffunction-sections \
104			-funwind-tables \
105			-fstack-protector \
106			-Wa,--noexecstack \
107			-Werror=format-security \
108			-fno-short-enums \
109			$(arch_variant_cflags) \
110			-include $(android_config_h) \
111			-I $(arch_include_dir)
112
113# This is to avoid the dreaded warning compiler message:
114#   note: the mangling of 'va_list' has changed in GCC 4.4
115#
116# The fact that the mangling changed does not affect the NDK ABI
117# very fortunately (since none of the exposed APIs used va_list
118# in their exported C++ functions). Also, GCC 4.5 has already
119# removed the warning from the compiler.
120#
121TARGET_GLOBAL_CFLAGS += -Wno-psabi
122
123TARGET_GLOBAL_LDFLAGS += \
124			-Wl,-z,noexecstack \
125			$(arch_variant_ldflags)
126
127# We only need thumb interworking in cases where thumb support
128# is available in the architecture, and just to be sure, (and
129# since sometimes thumb-interwork appears to be default), we
130# specifically disable when thumb support is unavailable.
131ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true)
132TARGET_GLOBAL_CFLAGS +=	-mthumb-interwork
133else
134TARGET_GLOBAL_CFLAGS +=	-mno-thumb-interwork
135endif
136
137TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
138
139TARGET_RELEASE_CFLAGS := \
140			-DNDEBUG \
141			-g \
142			-Wstrict-aliasing=2 \
143			-finline-functions \
144			-fno-inline-functions-called-once \
145			-fgcse-after-reload \
146			-frerun-cse-after-loop \
147			-frename-registers
148
149libc_root := bionic/libc
150libm_root := bionic/libm
151libstdc++_root := bionic/libstdc++
152libthread_db_root := bionic/libthread_db
153
154
155## on some hosts, the target cross-compiler is not available so do not run this command
156ifneq ($(wildcard $(TARGET_CC)),)
157# We compile with the global cflags to ensure that
158# any flags which affect libgcc are correctly taken
159# into account.
160TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name)
161endif
162
163# Define FDO (Feedback Directed Optimization) options.
164
165TARGET_FDO_CFLAGS:=
166TARGET_FDO_LIB:=
167
168target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
169        --print-file-name=libgcov.a)
170ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
171  # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
172  # The profile will be generated on /data/local/tmp/profile on the device.
173  TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
174  TARGET_FDO_LIB := $(target_libgcov)
175else
176  # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
177  # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
178  ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
179    TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
180  else
181    ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
182      $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
183    endif
184  endif
185
186  # If the FDO profile directory can't be found, then FDO is off.
187  ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
188    TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
189    TARGET_FDO_LIB := $(target_libgcov)
190  endif
191endif
192
193
194# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use
195# symlinks located in out/ to point to the appropriate kernel
196# headers. see 'config/kernel_headers.make' for more details
197#
198ifneq ($(CUSTOM_KERNEL_HEADERS),)
199    KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS)
200    KERNEL_HEADERS_ARCH   := $(CUSTOM_KERNEL_HEADERS)
201else
202    KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common
203    KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/arch-$(TARGET_ARCH)
204endif
205KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
206
207TARGET_C_INCLUDES := \
208	$(libc_root)/arch-arm/include \
209	$(libc_root)/include \
210	$(libstdc++_root)/include \
211	$(KERNEL_HEADERS) \
212	$(libm_root)/include \
213	$(libm_root)/include/arch/arm \
214	$(libthread_db_root)/include
215
216TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o
217TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o
218TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o
219
220TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_so.o
221TARGET_CRTEND_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_so.o
222
223TARGET_STRIP_MODULE:=true
224
225TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
226
227TARGET_CUSTOM_LD_COMMAND := true
228
229# Enable the Dalvik JIT compiler if not already specified.
230ifeq ($(strip $(WITH_JIT)),)
231    WITH_JIT := true
232endif
233
234define transform-o-to-shared-lib-inner
235$(TARGET_CXX) \
236	-nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \
237	-Wl,--gc-sections \
238	-Wl,-shared,-Bsymbolic \
239	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
240	$(PRIVATE_ALL_OBJECTS) \
241	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
242	-Wl,--whole-archive \
243	$(call normalize-host-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
244	-Wl,--no-whole-archive \
245	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
246	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
247	-o $@ \
248	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
249	$(PRIVATE_LDFLAGS) \
250	$(PRIVATE_TARGET_FDO_LIB) \
251	$(PRIVATE_TARGET_LIBGCC) \
252	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
253endef
254
255define transform-o-to-executable-inner
256$(TARGET_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
257	-Wl,-dynamic-linker,/system/bin/linker \
258    -Wl,--gc-sections \
259	-Wl,-z,nocopyreloc \
260	-o $@ \
261	$(TARGET_GLOBAL_LD_DIRS) \
262	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
263	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
264	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \
265	$(PRIVATE_ALL_OBJECTS) \
266	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
267	$(TARGET_GLOBAL_LDFLAGS) \
268	$(PRIVATE_LDFLAGS) \
269	$(TARGET_FDO_LIB) \
270	$(TARGET_LIBGCC) \
271	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
272endef
273
274define transform-o-to-static-executable-inner
275$(TARGET_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
276    -Wl,--gc-sections \
277	-o $@ \
278	$(TARGET_GLOBAL_LD_DIRS) \
279	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \
280	$(TARGET_GLOBAL_LDFLAGS) \
281	$(PRIVATE_LDFLAGS) \
282	$(PRIVATE_ALL_OBJECTS) \
283	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
284	$(TARGET_FDO_LIB) \
285	$(TARGET_LIBGCC) \
286	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
287endef
288