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 arm clang toolchain any 17 # 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_TOOLCHAIN_PREBUILT_ROOT := $(call get-toolchain-root,llvm) 31 LLVM_TOOLCHAIN_PREFIX := $(LLVM_TOOLCHAIN_PREBUILT_ROOT)/bin/ 32 33 TOOLCHAIN_NAME := arm-linux-androideabi 34 BINUTILS_ROOT := $(call get-binutils-root,$(NDK_ROOT),$(TOOLCHAIN_NAME)) 35 TOOLCHAIN_ROOT := $(call get-toolchain-root,$(TOOLCHAIN_NAME)-4.9) 36 TOOLCHAIN_PREFIX := $(TOOLCHAIN_ROOT)/bin/$(TOOLCHAIN_NAME)- 37 38 TARGET_CC := $(LLVM_TOOLCHAIN_PREFIX)clang$(HOST_EXEEXT) 39 TARGET_CXX := $(LLVM_TOOLCHAIN_PREFIX)clang++$(HOST_EXEEXT) 40 41 # 42 # CFLAGS and LDFLAGS 43 # 44 45 TARGET_CFLAGS := \ 46 -gcc-toolchain $(call host-path,$(TOOLCHAIN_ROOT)) \ 47 -fpic \ 48 -ffunction-sections \ 49 -funwind-tables \ 50 -fstack-protector-strong \ 51 -Wno-invalid-command-line-argument \ 52 -Wno-unused-command-line-argument \ 53 -no-canonical-prefixes 54 55 # Disable integrated-as for better compatibility 56 TARGET_CFLAGS += \ 57 -fno-integrated-as 58 59 TARGET_LDFLAGS += \ 60 -gcc-toolchain $(call host-path,$(TOOLCHAIN_ROOT)) \ 61 -no-canonical-prefixes 62 63 ifneq ($(filter %armeabi-v7a,$(TARGET_ARCH_ABI)),) 64 LLVM_TRIPLE := armv7-none-linux-androideabi 65 66 TARGET_CFLAGS += -target $(LLVM_TRIPLE) \ 67 -march=armv7-a \ 68 -mfloat-abi=softfp \ 69 -mfpu=vfpv3-d16 70 71 TARGET_LDFLAGS += -target $(LLVM_TRIPLE) \ 72 -Wl,--fix-cortex-a8 73 74 GCCLIB_SUBDIR := armv7-a 75 else 76 ifneq ($(filter %armeabi-v7a-hard,$(TARGET_ARCH_ABI)),) 77 LLVM_TRIPLE := armv7-none-linux-androideabi 78 79 TARGET_CFLAGS += -target $(LLVM_TRIPLE) \ 80 -march=armv7-a \ 81 -mfpu=vfpv3-d16 \ 82 -mhard-float \ 83 -D_NDK_MATH_NO_SOFTFP=1 84 85 TARGET_LDFLAGS += -target $(LLVM_TRIPLE) \ 86 -Wl,--fix-cortex-a8 \ 87 -Wl,--no-warn-mismatch \ 88 -lm_hard 89 90 GCCLIB_SUBDIR := armv7-a 91 else 92 LLVM_TRIPLE := armv5te-none-linux-androideabi 93 94 TARGET_CFLAGS += -target $(LLVM_TRIPLE) \ 95 -march=armv5te \ 96 -mtune=xscale \ 97 -msoft-float 98 99 TARGET_LDFLAGS += -target $(LLVM_TRIPLE) 100 101 GCCLIB_SUBDIR := 102 endif 103 endif 104 105 GCCLIB_ROOT := $(call get-gcclibs-path,$(NDK_ROOT),$(TOOLCHAIN_NAME)) 106 107 TARGET_CFLAGS.neon := -mfpu=neon 108 109 TARGET_arm_release_CFLAGS := -O2 \ 110 -g \ 111 -DNDEBUG \ 112 -fomit-frame-pointer \ 113 -fstrict-aliasing 114 115 TARGET_thumb_release_CFLAGS := -mthumb \ 116 -Os \ 117 -g \ 118 -DNDEBUG \ 119 -fomit-frame-pointer \ 120 -fno-strict-aliasing 121 122 # When building for debug, compile everything as arm. 123 TARGET_arm_debug_CFLAGS := $(TARGET_arm_release_CFLAGS) \ 124 -O0 \ 125 -UNDEBUG \ 126 -fno-omit-frame-pointer \ 127 -fno-strict-aliasing 128 129 TARGET_thumb_debug_CFLAGS := $(TARGET_thumb_release_CFLAGS) \ 130 -O0 \ 131 -UNDEBUG \ 132 -marm \ 133 -fno-omit-frame-pointer 134 135 # This function will be called to determine the target CFLAGS used to build 136 # a C or Assembler source file, based on its tags. 137 # 138 TARGET-process-src-files-tags = \ 139 $(eval __arm_sources := $(call get-src-files-with-tag,arm)) \ 140 $(eval __thumb_sources := $(call get-src-files-without-tag,arm)) \ 141 $(eval __debug_sources := $(call get-src-files-with-tag,debug)) \ 142 $(eval __release_sources := $(call get-src-files-without-tag,debug)) \ 143 $(call set-src-files-target-cflags, \ 144 $(call set_intersection,$(__arm_sources),$(__debug_sources)), \ 145 $(TARGET_arm_debug_CFLAGS)) \ 146 $(call set-src-files-target-cflags,\ 147 $(call set_intersection,$(__arm_sources),$(__release_sources)),\ 148 $(TARGET_arm_release_CFLAGS)) \ 149 $(call set-src-files-target-cflags,\ 150 $(call set_intersection,$(__arm_sources),$(__debug_sources)),\ 151 $(TARGET_arm_debug_CFLAGS)) \ 152 $(call set-src-files-target-cflags,\ 153 $(call set_intersection,$(__thumb_sources),$(__release_sources)),\ 154 $(TARGET_thumb_release_CFLAGS)) \ 155 $(call set-src-files-target-cflags,\ 156 $(call set_intersection,$(__thumb_sources),$(__debug_sources)),\ 157 $(TARGET_thumb_debug_CFLAGS)) \ 158 $(call add-src-files-target-cflags,\ 159 $(call get-src-files-with-tag,neon),\ 160 $(TARGET_CFLAGS.neon)) \ 161 $(call set-src-files-text,$(__arm_sources),arm) \ 162 $(call set-src-files-text,$(__thumb_sources),thumb) 163