8-bit char problem

[Paul Kienzle]

Under mingw and cygwin, toascii(setstr(200)) == 72 and
toascii(setstr(-100)) == 28.  It seems we only have 7-bit 
characters to work with.

I'm recompiling with -funsigned-char to see if I can get
toascii(setstr(200)) == 200, but the proper solution is 
to tag all chars with unsigned.  Otherwise we have to 
figure out how to tell all the compilers that can compile 
octave how to force unsigned chars.  Or is there already 
an autoconf test to do this?  The only one I see is 
AC_C_CHAR_UNSIGNED which defines __CHAR_UNSIGNED__ but 
doesn't modify CFLAGS and CXXFLAGS so that they are 
forced to be unsigned.

Paul Kienzle
address@hidden