found at run-time, as before, the -Wl,-R options that set the run-time
library search path weren't being used. Simply using LDFLAGS without
filtering doesn't work because the configure script appends CFLAGS to
LDFLAGS, and some commonly-used compiler options, e.g. -mcpu=..., which
causes python's makesetup to choke because the options aren't in the list
of recognized linker options. Thanks to D'Arcy J.M. Cain <darcy@druid.net>
for pointing out the error and possible solution.
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