Re: [cc65] Re: Problem with generating o65 files

From: Ullrich von Bassewitz; on Date: January 21, 2005, at 08:22 AM -0500
>
> On Fri, Jan 21, 2005 at 01:49:28PM +0100, Spiro Trikaliotis wrote:
> > BTW: To compile the cc65 package on my Cygwin box, I had to make
> > sure that src/common/inttypes.h includes stdint.h instead of defining
> > it's own types, or I get an error.
> >
> > Trying to check for __STDC_VERSION__ with a simple test source, I
> > get "No __STDC_VERSION__", so I do not know how this can be
> > distinguished.
>
> That means that the compiler is not conforming to the ISO C99 standard,
> which states that __STDC_VERSION__ must be a predefined macro. The
problem
> why the code doesn't work is probably that the compiler doesn't define
> __STDC_VERSION__, but seems to include stdint.h (which is a header file
> new in C99) somewhere, so there are name collisions. Unfortunately,
there's
> not much I can do about it. I would say it's a Cygwin problem. The
compiler
> should either say that it's C99 conformant, or not use any identifiers
new in
> C99.

Yes, it's a Cygwin bug.  This command:

(cc65/src/common/)$ gcc -H -fsyntax-only xsprintf.c

generates this console output:

. /usr/include/stdio.h
.. /usr/include/sys/types.h
... /usr/include/cygwin/types.h
.... /usr/include/stdint.h
. inttypes.h
In file included from xsprintf.c:44:
inttypes.h:51: error: conflicting types for `intmax_t'
/usr/include/stdint.h:66: error: previous declaration of `intmax_t'
inttypes.h:52: error: conflicting types for `uintmax_t'
/usr/include/stdint.h:67: error: previous declaration of `uintmax_t'

(Cygwin's "stdint.h" defines the maximum integer type as "long long".)

gcc defaults to c89 with extensions.  You must tell gcc version 3 to be
(almost) c99, with extensions, by adding the option "-std=gnu99" to it's
command-line.  Then, it will define __STDC_VERSION__.

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