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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-4.9
     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-strong \
     31     -no-canonical-prefixes
     32 
     33 TARGET_LDFLAGS := -no-canonical-prefixes
     34 
     35 ifneq ($(filter $(TARGET_ARCH_ABI), armeabi-v7a armeabi-v7a-hard),)
     36     TARGET_CFLAGS += -march=armv7-a \
     37                      -mfpu=vfpv3-d16
     38     TARGET_LDFLAGS += -march=armv7-a \
     39                      -Wl,--fix-cortex-a8
     40 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
     41     TARGET_CFLAGS += -mfloat-abi=softfp
     42 else
     43     TARGET_CFLAGS += -mhard-float \
     44                      -D_NDK_MATH_NO_SOFTFP=1
     45     TARGET_LDFLAGS += -Wl,--no-warn-mismatch \
     46                      -lm_hard
     47 endif
     48 
     49 else
     50     TARGET_CFLAGS += -march=armv5te \
     51                             -mtune=xscale \
     52                             -msoft-float
     53 endif
     54 
     55 TARGET_CFLAGS.neon := -mfpu=neon
     56 
     57 TARGET_arm_release_CFLAGS :=  -O2 \
     58                               -g \
     59                               -DNDEBUG \
     60                               -fomit-frame-pointer \
     61                               -fstrict-aliasing    \
     62                               -funswitch-loops     \
     63                               -finline-limit=300
     64 
     65 TARGET_thumb_release_CFLAGS := -mthumb \
     66                                -Os \
     67                                -g \
     68                                -DNDEBUG \
     69                                -fomit-frame-pointer \
     70                                -fno-strict-aliasing \
     71                                -finline-limit=64
     72 
     73 # When building for debug, compile everything as arm.
     74 TARGET_arm_debug_CFLAGS := $(TARGET_arm_release_CFLAGS) \
     75                            -O0 \
     76                            -UNDEBUG \
     77                            -fno-omit-frame-pointer \
     78                            -fno-strict-aliasing
     79 
     80 TARGET_thumb_debug_CFLAGS := $(TARGET_thumb_release_CFLAGS) \
     81                              -O0 \
     82                              -UNDEBUG \
     83                              -marm \
     84                              -fno-omit-frame-pointer
     85 
     86 # This function will be called to determine the target CFLAGS used to build
     87 # a C or Assembler source file, based on its tags.
     88 #
     89 TARGET-process-src-files-tags = \
     90 $(eval __arm_sources := $(call get-src-files-with-tag,arm)) \
     91 $(eval __thumb_sources := $(call get-src-files-without-tag,arm)) \
     92 $(eval __debug_sources := $(call get-src-files-with-tag,debug)) \
     93 $(eval __release_sources := $(call get-src-files-without-tag,debug)) \
     94 $(call set-src-files-target-cflags, \
     95     $(call set_intersection,$(__arm_sources),$(__debug_sources)), \
     96     $(TARGET_arm_debug_CFLAGS)) \
     97 $(call set-src-files-target-cflags,\
     98     $(call set_intersection,$(__arm_sources),$(__release_sources)),\
     99     $(TARGET_arm_release_CFLAGS)) \
    100 $(call set-src-files-target-cflags,\
    101     $(call set_intersection,$(__arm_sources),$(__debug_sources)),\
    102     $(TARGET_arm_debug_CFLAGS)) \
    103 $(call set-src-files-target-cflags,\
    104     $(call set_intersection,$(__thumb_sources),$(__release_sources)),\
    105     $(TARGET_thumb_release_CFLAGS)) \
    106 $(call set-src-files-target-cflags,\
    107     $(call set_intersection,$(__thumb_sources),$(__debug_sources)),\
    108     $(TARGET_thumb_debug_CFLAGS)) \
    109 $(call add-src-files-target-cflags,\
    110     $(call get-src-files-with-tag,neon),\
    111     $(TARGET_CFLAGS.neon)) \
    112 $(call set-src-files-text,$(__arm_sources),arm) \
    113 $(call set-src-files-text,$(__thumb_sources),thumb)
    114