error when creating an archive of my cocos2d app

This is the error in kazmath if you just change in neon_matrix_impl.c only

Undefined symbols for architecture arm64:  
  "_NEON_Matrix4Mul", referenced from:  
      _kmMat4Multiply in libcocos2d-library.a(mat4.o)  
ld: symbol(s) not found for architecture arm64  
clang: error: linker command failed with exit code 1 (use -v to see invocation)

You have to change ARM_NEON to ARMARCH_7 in two files:

1. neon_matrix_impl.c
2. mat4.c

In both files search for the #if and replace it.

#if defined(__ARM_NEON__)

With

#if defined(_ARM_ARCH_7)

64-bit should work fine after that.

I had to replace:

#if defined(__ARM_NEON__)

by:

#if defined(_ARM_ARCH_7)

in the file neon_matrix_impl.c.