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      1 # Copyright (C) 2009 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 gcc-4.8
     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 TARGET_CFLAGS := \
     27     -fpic \
     28     -ffunction-sections \
     29     -funwind-tables \
     30     -fstack-protector \
     31     -no-canonical-prefixes
     32 
     33 TARGET_LDFLAGS := -no-canonical-prefixes
     34 
     35 TARGET_C_INCLUDES := \
     36     $(SYSROOT_INC)/usr/include
     37 
     38 ifneq ($(filter $(TARGET_ARCH_ABI), armeabi-v7a armeabi-v7a-hard),)
     39     TARGET_CFLAGS += -march=armv7-a \
     40                      -mfpu=vfpv3-d16
     41     TARGET_LDFLAGS += -march=armv7-a \
     42                      -Wl,--fix-cortex-a8
     43 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
     44     TARGET_CFLAGS += -mfloat-abi=softfp
     45 else
     46     TARGET_CFLAGS += -mhard-float \
     47                      -D_NDK_MATH_NO_SOFTFP=1
     48     TARGET_LDFLAGS += -Wl,--no-warn-mismatch \
     49                      -lm_hard
     50 endif
     51 
     52 else
     53     TARGET_CFLAGS += -march=armv5te \
     54                             -mtune=xscale \
     55                             -msoft-float
     56 endif
     57 
     58 TARGET_CFLAGS.neon := -mfpu=neon
     59 
     60 TARGET_arm_release_CFLAGS :=  -O2 \
     61                               -g \
     62                               -DNDEBUG \
     63                               -fomit-frame-pointer \
     64                               -fstrict-aliasing    \
     65                               -funswitch-loops     \
     66                               -finline-limit=300
     67 
     68 TARGET_thumb_release_CFLAGS := -mthumb \
     69                                -Os \
     70                                -g \
     71                                -DNDEBUG \
     72                                -fomit-frame-pointer \
     73                                -fno-strict-aliasing \
     74                                -finline-limit=64
     75 
     76 # When building for debug, compile everything as arm.
     77 TARGET_arm_debug_CFLAGS := $(TARGET_arm_release_CFLAGS) \
     78                            -O0 \
     79                            -UNDEBUG \
     80                            -fno-omit-frame-pointer \
     81                            -fno-strict-aliasing
     82 
     83 TARGET_thumb_debug_CFLAGS := $(TARGET_thumb_release_CFLAGS) \
     84                              -O0 \
     85                              -UNDEBUG \
     86                              -marm \
     87                              -fno-omit-frame-pointer
     88 
     89 # This function will be called to determine the target CFLAGS used to build
     90 # a C or Assembler source file, based on its tags.
     91 #
     92 TARGET-process-src-files-tags = \
     93 $(eval __arm_sources := $(call get-src-files-with-tag,arm)) \
     94 $(eval __thumb_sources := $(call get-src-files-without-tag,arm)) \
     95 $(eval __debug_sources := $(call get-src-files-with-tag,debug)) \
     96 $(eval __release_sources := $(call get-src-files-without-tag,debug)) \
     97 $(call set-src-files-target-cflags, \
     98     $(call set_intersection,$(__arm_sources),$(__debug_sources)), \
     99     $(TARGET_arm_debug_CFLAGS)) \
    100 $(call set-src-files-target-cflags,\
    101     $(call set_intersection,$(__arm_sources),$(__release_sources)),\
    102     $(TARGET_arm_release_CFLAGS)) \
    103 $(call set-src-files-target-cflags,\
    104     $(call set_intersection,$(__arm_sources),$(__debug_sources)),\
    105     $(TARGET_arm_debug_CFLAGS)) \
    106 $(call set-src-files-target-cflags,\
    107     $(call set_intersection,$(__thumb_sources),$(__release_sources)),\
    108     $(TARGET_thumb_release_CFLAGS)) \
    109 $(call set-src-files-target-cflags,\
    110     $(call set_intersection,$(__thumb_sources),$(__debug_sources)),\
    111     $(TARGET_thumb_debug_CFLAGS)) \
    112 $(call add-src-files-target-cflags,\
    113     $(call get-src-files-with-tag,neon),\
    114     $(TARGET_CFLAGS.neon)) \
    115 $(call set-src-files-text,$(__arm_sources),arm) \
    116 $(call set-src-files-text,$(__thumb_sources),thumb)
    117