> That is a strange error; I do not know what would cause
> it.  Try without
> the -j4 flag (i.e. a single-core build) and see what
> happens.

Okay. Looks like another single processor compile. I removed the libcaldav package and the -j4 flag.

The package built. So the only remaining test for this package is to compile with and without libcarddav.

Whew!