Daniel Richard G. wrote:
> So to make a long story short: After I add \x15 and remove \x25 to/from
> _C_CTYPE_CNTRL for EBCDIC, the test passes in the signed-char case.

Thanks, given all that history let's rewrite it so that the compiler can decide 
what '\n' maps to, that way it'll work even in EBCDIC environments that agree 
with IANA instead of IBM.  I installed the attached patch, which should fix the 
bugs you mentioned.