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      1 # Copyright (C) 2014 The Android Open Source Project
      2 #
      3 # Licensed under the Apache License, Version 2.0 (the "License");
      4 # you may not use this file except in compliance with the License.
      5 # You may obtain a copy of the License at
      6 #
      7 #      http://www.apache.org/licenses/LICENSE-2.0
      8 #
      9 # Unless required by applicable law or agreed to in writing, software
     10 # distributed under the License is distributed on an "AS IS" BASIS,
     11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 # See the License for the specific language governing permissions and
     13 # limitations under the License.
     14 #
     15 
     16 # this file is used to prepare the NDK to build with the arm64 clang-3.4
     17 # toolchain any number of source files
     18 #
     19 # its purpose is to define (or re-define) templates used to build
     20 # various sources into target object files, libraries or executables.
     21 #
     22 # Note that this file may end up being parsed several times in future
     23 # revisions of the NDK.
     24 #
     25 
     26 #
     27 # Override the toolchain prefix
     28 #
     29 
     30 LLVM_VERSION := 3.4
     31 LLVM_NAME := llvm-$(LLVM_VERSION)
     32 LLVM_TOOLCHAIN_ROOT := $(NDK_ROOT)/toolchains/$(LLVM_NAME)
     33 LLVM_TOOLCHAIN_PREBUILT_ROOT := $(call host-prebuilt-tag,$(LLVM_TOOLCHAIN_ROOT))
     34 LLVM_TOOLCHAIN_PREFIX := $(LLVM_TOOLCHAIN_PREBUILT_ROOT)/bin/
     35 
     36 TOOLCHAIN_VERSION := 4.9
     37 TOOLCHAIN_NAME := aarch64-linux-android-$(TOOLCHAIN_VERSION)
     38 TOOLCHAIN_ROOT := $(NDK_ROOT)/toolchains/$(TOOLCHAIN_NAME)
     39 TOOLCHAIN_PREBUILT_ROOT := $(call host-prebuilt-tag,$(TOOLCHAIN_ROOT))
     40 TOOLCHAIN_PREFIX := $(TOOLCHAIN_PREBUILT_ROOT)/bin/aarch64-linux-android-
     41 
     42 TARGET_CC := $(LLVM_TOOLCHAIN_PREFIX)clang$(HOST_EXEEXT)
     43 TARGET_CXX := $(LLVM_TOOLCHAIN_PREFIX)clang++$(HOST_EXEEXT)
     44 
     45 LLVM_TRIPLE := aarch64-none-linux-android
     46 
     47 TARGET_CFLAGS := \
     48     -gcc-toolchain $(call host-path,$(TOOLCHAIN_PREBUILT_ROOT)) \
     49     -target $(LLVM_TRIPLE) \
     50     -ffunction-sections \
     51     -funwind-tables \
     52     -fstack-protector \
     53     -fpic \
     54     -no-canonical-prefixes
     55 
     56 TARGET_C_INCLUDES := \
     57     $(SYSROOT_INC)/usr/include
     58 
     59 TARGET_LDFLAGS += \
     60     -gcc-toolchain $(call host-path,$(TOOLCHAIN_PREBUILT_ROOT)) \
     61     -target $(LLVM_TRIPLE) \
     62     -no-canonical-prefixes
     63 
     64 TARGET_arm64_release_CFLAGS :=  -O2 \
     65                                 -g \
     66                                 -DNDEBUG \
     67                                 -fomit-frame-pointer \
     68                                 -fstrict-aliasing
     69 
     70 TARGET_arm64_debug_CFLAGS := $(TARGET_arm64_release_CFLAGS) \
     71                              -O0 \
     72                              -UNDEBUG \
     73                              -fno-omit-frame-pointer \
     74                              -fno-strict-aliasing
     75 
     76 # This function will be called to determine the target CFLAGS used to build
     77 # a C or Assembler source file, based on its tags.
     78 #
     79 TARGET-process-src-files-tags = \
     80 $(eval __debug_sources := $(call get-src-files-with-tag,debug)) \
     81 $(eval __release_sources := $(call get-src-files-without-tag,debug)) \
     82 $(call set-src-files-target-cflags, $(__debug_sources), $(TARGET_arm64_debug_CFLAGS)) \
     83 $(call set-src-files-target-cflags, $(__release_sources),$(TARGET_arm64_release_CFLAGS)) \
     84