Big Sur no longer has a libc library, so ttfautohint.memory fails #6
Description
ttfautohint.memory does this:
libc_path = find_library("c")
if libc_path is None:
raise OSError("Could not find the libc shared library")
On Big Sur there is no libc(!) I know there are efforts to fix ctypes loading on Python 3.8 and 3.9 but I'm not clear if that includes a workaround to the missing libc issue.
See fonttools/fontbakery#3107 for more context.