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Message-ID: <933ee03d-d786-4edc-b0de-6d56cf995268@SystematicSW.ab.ca>
Date: Wed, 9 Apr 2025 14:33:04 -0600
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Subject: Re: Latest c-ares build compile failure from sys/unistd.h
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From: Brian Inglis via Cygwin <cygwin AT cygwin DOT com>
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On 2025-04-09 13:49, Brian Inglis via Cygwin wrote:
> Hi folks,
> 
> Latest c-ares build failing with gcc 12.4 and Cygwin 3.6.0 header:
> 
> $ uname -srvmo
> CYGWIN_NT-10.0-19045 3.6.0-1.x86_64 2025-03-18 17:01 UTC x86_64 Cygwin
> $ gcc --version
> gcc (GCC) 12.4.0
> Copyright (C) 2022 Free Software Foundation, Inc.
> ...
> 
> /usr/include/sys/unistd.h:218:14: error: expected ';' before 'void'
>    218 | static inline void setproctitle_init (int _c, char *_a[], char *_e[]) {}
>        |              ^~~~~
>        |              ;
> 
> $ ll -gG /usr/include/sys/unistd.h
> -rw-r--r-- 1 23K Mar 18 11:09 /usr/include/sys/unistd.h
> ...
> 215     #if defined(__CYGWIN__) && __BSD_VISIBLE
> 216     /* Stub for Linux libbsd compatibility. */
> 217     #define initsetproctitle(c, a, e) setproctitle_init((c), (a), (e))
> 218     static inline void setproctitle_init (int _c, char *_a[], char *_e[]) {}
> 219
> 220     void setproctitle (const char *, ...)
> 221                        _ATTRIBUTE ((__format__ (__printf__, 1, 2)));
> 222     #endif
> ...
> 
> includes latest fix to definition; also tried with original definition.
> 
> Not seeing any obvious issues with storage class and type specifiers mentioned.
> 
> For now, build working with !defined(__CYGWIN__) hack.
> 
> No problem with other builds! Ideas welcome ;^>

Doing some more `make`-ing in that directory with permutations of specifiers, 
complaint comes after `inline`; seems like it does not like `inline` anywhere in 
that line, although `__inline__` works just fine!

Perhaps a patch is warranted, possibly conditional on GCC <= 12?

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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