Re: Bison 1.49b on Cygwin

[Akim Demaille]

| Compiling Bison 1.49b on Cygwin gives me warnings like this in most source
| files:
| 
| gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../src -I../lib    -g -O2  -c `test 
-f ' timevar.c' || echo './'`timevar.c
| In file included from /usr/include/stdlib.h:19,
|                  from ../src/system.h:47,
|                  from timevar.c:34:
| /usr/include/alloca.h:14: warning: `alloca' redefined
| ../src/system.h:27: warning: this is the location of the previous definition
| 
| This is harmless because the definitions in system.h and in alloca.h are
| the same, but perhaps you want to clean it up anyway.

Ha!  Now I understand :(  Thanks!  I had not realized we had a hard
copy of alloca's prototype in system.h.

Well, I have looked at how Jim handles this case in the Coreutils: the
only difference I can see is that he includes stdlib.h *before* the
`alloca' section.  What happens if you do the same?  I.e., if you try
the following system.h instead:

system.h
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