Re: Too many warnings building Emacs with GCC 6 on MSYS2-MinGW64

[Angelo Graziosi]

Il 31/08/2016 20:47, Eli Zaretskii ha scritto:
> > Cc: address@hidden
> > From: Ken Brown <address@hidden>
> > Date: Wed, 31 Aug 2016 14:11:41 -0400
> >
> > According to
> >
> >    http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html
> >    http://man7.org/linux/man-pages/man2/execve.2.html
> >
> > you should include <unistd.h>, and the return type should be int.
>
> Thanks.  On MS-Windows, execve is not declared in unistd.h, it's
> declared in process.h (which we cannot include, because it conflicts
> with our own process.h).  Nevertheless, doing what you suggest is
> worth a try, since there are no other ideas.

As always, Ken's suggestions are right!

Now this test case,

$ cat test.c
/*#include <stdint.h>*/
#include <unistd.h>

/*extern intptr_t execve (const char *, char * const *, char * const *);*/
/*extern intptr_t execve (const char *, char * const [], char * const []);*/
extern int execve (const char *, char * const *, char * const *);

int main()
{
  return 0;
}

builds without warnings with

$ gcc -Wall test.c


BTW, I tried my first test case (that with the Emacs definition of 
'execve') with the other compilers in MSYS2/MinGW-64/32, and both MSYS2 
gcc 5.3 and MinGW64 gcc-6.1 give the warning, instead MinGW32 gcc-6.1 
does not print warnings.

Ciao,
Angelo.