Cannot build sa-solver

[Tsangares]

When I try to run the command sa-solver I come across this error:

Solving default all-zero 140-byte header
Building program
OpenCL build failed (-11). Build log follows:
input.cl:654:18: warning: initializing '__global uchar *' (aka '__global unsigned char *') with an expression of type '__global char *' converts between pointers to integer types with different sign
input.cl:787:37: warning: incompatible pointer types initializing '__global char *' with an expression of type '__global uint *' (aka '__global unsigned int *')
input.cl:787:53: warning: incompatible pointer types initializing '__global char *' with an expression of type '__global uint *' (aka '__global unsigned int *')
<unknown>:0:0: in function kernel_init_ht void (i8 addrspace(1)*, i32 addrspace(1)*): unsupported call to function get_local_size

[prwik]

CL_BUILD_PROGRAM_FAILURE