BUILD ON AIX:
It can appear that the build fails with the error
"rpl_malloc" or "rpl_realloc" not defined.
This bug is known and the issue can be worked around
by exporting the following variables in the environment
before running the "configure" script:
$ export ac_cv_func_realloc_0_nonnull=yes
$ export ac_cv_func_malloc_0_nonnull=yes