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Crosscompile for AARCH64 with neon fails #60

Open N30dG opened 8 years ago

N30dG commented 8 years ago

Hello, I'm trying to make a X-Compile from debian 8 to AARCH64 with neon using aarch64-linux-gnu-gcc. Without NEON I have no problem's. But with setting the --enable-neon flag it fails.

Here is my build-log: fftw-build.txt

I really don't know what I'm doing wrong.

matteo-frigo commented 8 years ago

The first error is this:

/usr/lib/gcc/aarch64-linux-gnu/4.9/include/arm_neon.h: In function 'vqadd_u8': /usr/lib/gcc/aarch64-linux-gnu/4.9/include/arm_neon.h:2116:3: error: incompatible types when returning type 'int' but 'uint8x8_t' was expected return __builtin_aarch64_uqaddv8qi_uuu (a, b);

I have no idea what this is, but it doesn't seem to have anything to do with us. I.e., a header file declares a function that tries to cast uint8x8_t into int. You'll have to debug your gcc installation, I am afraid.

N30dG commented 8 years ago

You'll have to debug your gcc installation, I am afraid.<

I don't know how to do this. My gcc comes from Debian-Repository. It's simply Installed using apt-get ;)

dfarns commented 8 years ago

What version of gcc are you using? Perhaps your version of GCC is insufficient for the 64 bit neon intrinsics? I think gcc 4.9.3 or later is sufficient, but i don't know if the 4.9.1 arm neon header is new enough.

N30dG commented 8 years ago

Yes you are right! using GCC 5.3 works fine :). Before I used GCC 4.9.2. Can be closed, thanks :)