Bug#1069144: ADvice about htis pocl issue on armel

[PICCA Frederic-Emmanuel]

Hello Andreas, 

I have another autopkgtest failure on armel with silx and pocl

The content of check_atomic32 is

def check_atomic32(device):
    try:
        ctx = pyopencl.Context(devices=[device])
    except:
        return False, f"Unable to create context on {device}"
    else:
        queue = pyopencl.CommandQueue(ctx)
    src = """
kernel void check_atomic32(global int* ary){
int res = atom_inc(ary);
}
"""
    try:
        prg = pyopencl.Program(ctx, src).build()
    except Exception as err:
        return False, f"{type(err)}: {err}"
    a = numpy.zeros(1, numpy.int32)
    d = cla.to_device(queue, a)
    prg.check_atomic32(queue, (1024,), (32,), d.data).wait()
    value = d.get()[0]
    return value == 1024, f"Got the proper value 1024=={value}"


1019s Testing with python3.12:
1024s pocl warning: encountered incomplete implementation in ./lib/CL/clGetDeviceInfo.c:98
1026s dlopen("/tmp/autopkgtest-lxc.1tg98r_u/downtmp/autopkgtest_tmp/.cache/pocl/kcache/GI/PODCELNLNPFCGBFNGLEIHDEIECBKNFCDBNAPP/check_atomic32/0-0-0/check_atomic32.so") failed with '/tmp/autopkgtest-lxc.1tg98r_u/downtmp/autopkgtest_tmp/.cache/pocl/kcache/GI/PODCELNLNPFCGBFNGLEIHDEIECBKNFCDBNAPP/check_atomic32/0-0-0/check_atomic32.so: undefined symbol: __atomic_fetch_add_4'.
1026s note: missing symbols in the kernel binary might be reported as 'file not found' errors.

I found something similar about scipy here

https://github.com/scipy/scipy/issues/19982

I am wondering if this is an issue with pocl or llvm on armel.

Fred