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armclang compile arm_neon.h, there is error: unknown type name '__simd64_int8_t'

Chien-Ming Lu

I use ARM Development Studio and use it's ARM C compiler for Embedded 6. 

When I include "arm_neon.h" and using

armclang.exe --target=arm-arm-none-eabi -mcpu=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -marm -fvectorize -O0 -g -MD -MP -c -o "src/sfp_interest_point.o" "../src/sfp_interest_point.c"

../src\arm_neon.h:57:9: error: unknown type name '__simd64_int8_t'

../src\arm_neon.h:58:9: error: unknown type name '__simd64_int16_t'

../src\arm_neon.h:59:9: error: .........

According to some information, I have set the mfpu=neon-vfpv4, -mfloat-abi=hard, but the error still there.

Could some people know why I will have error?

 

Regards

Gilbert

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  • 0 Arm Employee Badge in reply to Chien-Ming Lu

    Hi GIlbert, that makes sense! Thanks for posting your solution back here.

    Indeed, the header file arm_neon.h has the same name in GCC and Armclang: this is for your user code to be portable between compilers, BUT that header file is part of the toolchain and you must not copy it out and use it with a different toolchain. You must always use the header file that is packaged with the toolchain you are using. This is true for GCC vs Armclang, but also between different versions of the same toolchain, e.g. a heder file from GCC12 might not work with GCC13.

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  • 0 Arm Employee Badge in reply to Chien-Ming Lu

    Hi GIlbert, that makes sense! Thanks for posting your solution back here.

    Indeed, the header file arm_neon.h has the same name in GCC and Armclang: this is for your user code to be portable between compilers, BUT that header file is part of the toolchain and you must not copy it out and use it with a different toolchain. You must always use the header file that is packaged with the toolchain you are using. This is true for GCC vs Armclang, but also between different versions of the same toolchain, e.g. a heder file from GCC12 might not work with GCC13.

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