Compilation on Ultrix cc

[Hrvoje.Niksic@public.srce.hr (Hrvoje Niksic)]

I had problems compiling zsh on Ultrix 4.2 with cc.

1. configure determined that the compiler is non-ANSI, which is true enough,
but ansi2knr is still unnecessary since all it does is converting the
function declarations to ANSI-style, and the cc can handle them.

2. In several places the name of a variable is the same as the name of a cpp
macro. The newer cpp-s ignore the variable, whereas the Ultrix cpp gives a
warning, but still makes the substitution with an empty argument. This
prevents the compilation of builtin.c (because of iword macro/variables) and
zle_tricky.c (because of nonempty macro/variables). The solution is to
rename either the macro or the variables in both cases. Note that
zle_tricky.c uses both forms of nonempty.

3. glob.c contains the things that make Ultrix compiler happy wrapped within
#ifdef ULTRIX. However, the Ultrix cc defines only ultrix (lower-case),
which is why a %s/ULTRIX/ultrix is welcome in glob.c. Without it, glob.c
will not compile.

These things done, the shell compiles and works well.

-- 
hniksic@srce.hr              |  Student of electrical engineering
hniksic@fly.cc.fer.hr        |  University of Zagreb, Croatia
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