Re: compilation of findutils-4.4.0 with gcc-4.4.0-20090225 -- error with wctype.h in gnulib code

[Bruno Haible]

Frank Erens wrote:
> > Please, on what system? You mentioned the compiler you are using, but the
> > platform (`uname -srm`) is also mandatory information.
> >
> Sorry, I didn't knew this was important:
> Linux 2.6.27-11-server i686

Thanks. Yes it's important so that we know at which copy of <wctype.h> to look 
at.
Namely, the one from glibc. And for reproducing. Building findutils-4.4.0 on a
Linux 2.6.25.5 system with 4.3.1, there are no problems.

> I checked those lines, and they all seem to use a wint_t variable.

Yes, the syntax errors appear to be where 'wint_t' is used as a type.

> I've checked 
> the preprocessed source code, and there was no typedef for wint_t in there.
> I tried compiling the following code:
> ---------------------------------------------------------
> #include <wchar.h>
> #include <wctype.h>
> void test(wint_t _wc) {}
> int main(void) {}
> ---------------------------------------------------------
> But that worked without problems. The prepocessed source code did contain
> the typedef.

So, you have three options:
  - look at the <wchar.h> and <wctype.h> files for the conditions under which
    wint_t is defined or not being defined. Also look at the wchar.h and
    wctype.h files generated in the lib/ directory by gnulib.
  - Reduce the source file mbchar.c, removing includes and code, as long as
    it errs out while compiling. This will give you a hint.
  - Try building with an older compiler. Since you say that it's the first
    build that you are doing with this new, snapshot version of gcc.

> I've used the following quick hack to solve it, however, I'm still not
> certain what the causes of this bug were.
> ---------------------------------------------------------
> --- mbchar.h.orig     2009-02-28 18:37:45.000000000 +0000
> +++ mbchar.h  2009-02-28 18:40:03.000000000 +0000
> @@ -151,6 +151,10 @@
>     <wchar.h>.
>     BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
>     <wchar.h>.  */
> +
> +/* Quick fix for wint_t */
> +typedef unsigned int wint_t;
> +
>  #include <stdio.h>
>  #include <time.h>
>  #include <wchar.h>
> ---------------------------------------------------------

Yes, but such quick hack can not be committed upstream. In other words, such
a quick hack helps you, but no one else who might encounter the same problem.

Bruno