Android; ARM NEON; Can't compile project with "arm_neon.h";

[Denis Pozharskiy]

Hi everybody.

I try to work with ARM_NEON coprocessor.
To turn on support of NEON I include "arm_neon.h" in my project. When I tryed to compile this I got error message (see below). 
I think problem connected with compilator flags. 

Could you give me advice, please. Which flags I need to use. Or any other solution?
Thanks in advance.

PS I'm using latest NDK "android-ndk-r6b" from "android.com", Platform ARM Cortex-A8.

Error message (showing only for first function, the same situation for each other function definitions).

In file included from D:/work/sdk/h264enc/src/encoder/process_row/jni/../../../opt/noOPT/preproc.c:4:
D:\android-ndk-r6\toolchains\arm-linux-androideabi-4.4.3\prebuilt\windows\bin\../lib/gcc/arm-linux-androideabi/4.4.3/inc
lude/arm_neon.h: In function 'vadd_s8':
D:\android-ndk-r6\toolchains\arm-linux-androideabi-4.4.3\prebuilt\windows\bin\../lib/gcc/arm-linux-androideabi/4.4.3/inc
lude/arm_neon.h:402: error: incompatible type for argument 1 of '__builtin_neon_vaddv8qi'
D:\android-ndk-r6\toolchains\arm-linux-androideabi-4.4.3\prebuilt\windows\bin\../lib/gcc/arm-linux-androideabi/4.4.3/inc
lude/arm_neon.h:402: note: expected '__builtin_neon_qi __vector__' but argument is of type 'int8x8_t'
D:\android-ndk-r6\toolchains\arm-linux-androideabi-4.4.3\prebuilt\windows\bin\../lib/gcc/arm-linux-androideabi/4.4.3/inc
lude/arm_neon.h:402: error: incompatible type for argument 2 of '__builtin_neon_vaddv8qi'
D:\android-ndk-r6\toolchains\arm-linux-androideabi-4.4.3\prebuilt\windows\bin\../lib/gcc/arm-linux-androideabi/4.4.3/inc
lude/arm_neon.h:402: note: expected '__builtin_neon_qi __vector__' but argument is of type 'int8x8_t'
make: *** [/cygdrive/d/work/sdk/h264enc/src/encoder/process_row/obj/local/armeabi-v7a/objs/vsshencoderlib/../../../opt/n
oOPT/preproc.o] Error 1

[David Turner]

Quick question, did you follow the instructions at docs/CPU-ARM-NEON.html to enable NEON compilation too?

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