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Original question:

CC2564C: [REQ] How to use TI-BT-4-2-STACK-LINUX-ADDON SDK on cortexA7 wo float point?

CC2564C: n/a

Nan Shao
Prodigy 70 points

Part Number: CC2564C

I have met such issue when cross compile TI Bluetooth add-on for Linux version v4.2.1.1.1.0 

Compile error as below

LN BTPMSRVR_S.o libBTPM_S.a libBTPM_HAL_S.a libSS1BTAUD.a libSS1BTGAV.a libSS1BTAVC.a libSS1BTAVR.a libSS1SBC.a libSS1BTFTP.a libSS1BTHDP.a libSS1BTHDS.a libSS1BTHIDH.a libSS1BTHID.a libSS1BTPAN.a libBTPS_VNET.a libSS1BTPBA.a libSS1BTHFR.a libSS1BTMAP.a libSS1BTOPP.a libSS1BTCTS.a libSS1BTNDCS.a libSS1BTRTUS.a libSS1BTDIS.a libSS1BTGAT.a libSS1BTGAPS.a libSS1BTCSCS.a libSS1BTHIDS.a libSS1BTNDC.a libSS1BTRTU.a libSS1BTIAS.a libSS1BTHRS.a libSS1BTSCP.a libSS1BTLLS.a libSS1BTBAS.a libSS1BTTPS.a libBTPS.a libBTPS_PLA.a libBTPS_OSA.a -o SS1BTPM

/nshao_repo/tmo/HB_Tools/32/toolchain/bin/../lib/gcc/arm-openwrt-linux-muslgnueabi/5.2.0/../../../../arm-openwrt-linux-muslgnueabi/bin/ld: error: obj/BTPMSRVR_S.o uses VFP register arguments, ../BluetopiaPM/bin/SS1BTPM does not

/nshao_repo/tmo/HB_Tools/32/toolchain/bin/../lib/gcc/arm-openwrt-linux-muslgnueabi/5.2.0/../../../../arm-openwrt-linux-muslgnueabi/bin/ld: failed to merge target specific data of file obj/BTPMSRVR_S.o

/nshao_repo/tmo/HB_Tools/32/toolchain/bin/../lib/gcc/arm-openwrt-linux-muslgnueabi/5.2.0/../../../../arm-openwrt-linux-muslgnueabi/bin/ld: error: ../BluetopiaPM/lib/libBTPM_S.a(BTPMMAIN_S.o) uses VFP register arguments, ../BluetopiaPM/bin/SS1BTPM does not

/nshao_repo/tmo/HB_Tools/32/toolchain/bin/../lib/gcc/arm-openwrt-linux-muslgnueabi/5.2.0/../../../../arm-openwrt-linux-muslgnueabi/bin/ld: failed to merge target specific data of file ../BluetopiaPM/lib/libBTPM_S.a(BTPMMAIN_S.o)

It seems trying to link BTPMSRVR_S.o with libBTPM_S.a and other static library

I checked BTPMMAIN_S.o(inside libBTPM_S.a) with readelf -A

nshao@TMO_Env:/nshao_repo/tmo/AM335xBluetopiaLinuxProduction-4.2.1.1.1.0/build$ readelf -A  BTPMMAIN_S.o

Attribute Section: aeabi

File Attributes

  Tag_CPU_name: "7-A"

  Tag_CPU_arch: v7

  Tag_CPU_arch_profile: Application

  Tag_ARM_ISA_use: Yes

  Tag_THUMB_ISA_use: Thumb-2

  Tag_FP_arch: VFPv3

  Tag_Advanced_SIMD_arch: NEONv1

  Tag_ABI_PCS_wchar_t: 4

  Tag_ABI_FP_denormal: Needed

  Tag_ABI_FP_exceptions: Needed

  Tag_ABI_FP_number_model: IEEE 754

  Tag_ABI_align_needed: 8-byte

  Tag_ABI_align_preserved: 8-byte, except leaf SP

  Tag_ABI_enum_size: int

  Tag_ABI_VFP_args: VFP registers

  Tag_ABI_optimization_goals: Aggressive Speed

  Tag_CPU_unaligned_access: v6

Then I update compile parameter with -mfpu=neon and -mfloat-abi = hard to recompile BTPMSRVR_S.o, after compile success, I also check BTPMSRVR_S.o with readelf -A, result as below

nshao@TMO_Env:/nshao_repo/tmo/AM335xBluetopiaLinuxProduction-4.2.1.1.1.0/build$ readelf -A obj/BTPMSRVR_S.o

Attribute Section: aeabi

File Attributes

  Tag_CPU_name: "7-A"

  Tag_CPU_arch: v7

  Tag_CPU_arch_profile: Application

  Tag_ARM_ISA_use: Yes

  Tag_THUMB_ISA_use: Thumb-2

  Tag_FP_arch: VFPv3

  Tag_Advanced_SIMD_arch: NEONv1

  Tag_ABI_PCS_wchar_t: 4

  Tag_ABI_FP_denormal: Needed

  Tag_ABI_FP_exceptions: Needed

  Tag_ABI_FP_number_model: IEEE 754

  Tag_ABI_align_needed: 8-byte

  Tag_ABI_align_preserved: 8-byte, except leaf SP

  Tag_ABI_enum_size: int

  Tag_ABI_VFP_args: VFP registers

  Tag_ABI_optimization_goals: Aggressive Size

  Tag_CPU_unaligned_access: v6

It seems both these files use VFPv3 and VPF registers. So I don’t know why I still get link failed?

Could you please help?

  • 0
    TI__Mastermind 27090 points

    Which host processor and tool chain are you using? The BluetopiaPM libraries are built with Linaro toolchain for Cortex-A (v7) with hard floating point option.

    Thanks

  • 0 in reply to Hari Nagalla
    Prodigy 70 points

    Hi, 

    I am running on Intel X86 CPU with Qualcomm cross compile toolchain.

    The toolchain support cortex-A7 CPU, below is supported CPU list

    arm-openwrt-linux-gcc: note: valid arguments to '-mcpu=' are: arm1020e arm1020t arm1022e arm1026ej-s arm10e arm10tdmi arm1136j-s arm1136jf-s arm1156t2-s arm1156t2f-s arm1176jz-s arm1176jzf-s arm2 arm250 arm3 arm6 arm60 arm600 arm610 arm620 arm7 arm70 arm700 arm700i arm710 arm7100 arm710c arm710t arm720 arm720t arm740t arm7500 arm7500fe arm7d arm7di arm7dm arm7dmi arm7m arm7tdmi arm7tdmi-s arm8 arm810 arm9 arm920 arm920t arm922t arm926ej-s arm940t arm946e-s arm966e-s arm968e-s arm9e arm9tdmi cortex-a12 cortex-a15 cortex-a15.cortex-a7 cortex-a17 cortex-a17.cortex-a7 cortex-a5 cortex-a53 cortex-a57 cortex-a57.cortex-a53 cortex-a7 cortex-a72 cortex-a72.cortex-a53 cortex-a8 cortex-a9 cortex-m0 cortex-m0.small-multiply cortex-m0plus cortex-m0plus.small-multiply cortex-m1 cortex-m1.small-multiply cortex-m3 cortex-m4 cortex-m7 cortex-r4 cortex-r4f cortex-r5 cortex-r7 ep9312 exynos-m1 fa526 fa606te fa626 fa626te fa726te fmp626 generic-armv7-a iwmmxt iwmmxt2 marvell-pj4 mpcore mpcorenovfp native strongarm strongarm110 strongarm1100 strongarm1110 xgene1 xscale

    Below is supported fpu list

    arm-openwrt-linux-gcc: note: valid arguments to '-mfpu=' are: crypto-neon-fp-armv8 fp-armv8 fpv4-sp-d16 fpv5-d16 fpv5-sp-d16 neon neon-fp-armv8 neon-fp16 neon-vfpv4 vfp vfp3 vfpv3 vfpv3-d16 vfpv3-d16-fp16 vfpv3-fp16 vfpv3xd vfpv3xd-fp16 vfpv4 vfpv4-d16

    When I compile TI Bluetopia add-on, I add following compile parameter to toolschain.mak

    CFLAGS+=-mfpu=neon -O2 -fno-strict-aliasing -Os -pipe -march=armv7-a -mtune=cortex-a7 -fno-caller-saves -Wa,--noexecstack -fhonour-copts -mfloat-abi=hard -fPIC -fstack-protector --sysroot=$(TOOLCHAIN_PATH_TARGET) -I$(TOOLCHAIN_PATH_TARGET)/usr/include

    Please help how can I pass compile?

    br

    Shao nan

  • 0 in reply to Nan Shao
    Prodigy 70 points

    Dear

    Any update about this?

    br

    Shao nan

  • 0 in reply to Nan Shao
    TI__Mastermind 27090 points

    Even, though your tool chain supports ARMV7-a instruction set. how is your file system built? Is it built for same architecture version and floating point options?

    I believe, this thread is followed privately too right? 

    Thanks

  • 0 in reply to Hari Nagalla
    Prodigy 70 points

    Hi,

    What's "file system" meaning here? Do you mean my OS which use cross compiler should be compiled by ARMv7 toolschain?

    br

    Shao nan

  • 0 in reply to Nan Shao
    TI__Mastermind 27090 points

    I mean the target file system with glibc and other runtime libraries.

    Thanks