On Sun, 21 Jan 2001, Jun-ichiro itojun Hagino wrote:

: 	this is my proposed fix.  unfortunately, since ctype.h defines
: 	macros for is*, binaries need to be recompiled to use the new isprint()
: 	declaration.

This breaks the ABI.  "Binaries need to be recompiled" is not an acceptable
solution for libc; old binaries must continue to work as they have been.

Typical resolution for this type of situation:  Version the array, providing
a new-name array for future binaries to use, and the old-name array for old
binaries.

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