Re: __STRICT_ANSI__ and stdio.h

[KIMURA Masaru <hiyuh.root@gmail.com>]

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Hi,

>> is cygwin's __STRICT_ANSI__ and stdio.h behavior not so compatible to glibc's?
>
> Cygwin is using newlib, newlib is BSD based.  We introduced the
> compatibility checking macros from FreeBSD lately.

i roughly checked FreeBSD include/stdio.h and sys/sys/cdefs.h.
https://github.com/freebsd/freebsd/blob/master/include/stdio.h
https://github.com/freebsd/freebsd/blob/master/sys/sys/cdefs.h

it looks very different to newlib's.
FreeBSD has visibility for popen()/pclose() if __POSIX_VISIBLE >= 199209,
it looks no checking about __STRICT_ANSI__ in their cdefs.h.
only one thing i worried about is _ANSI_SOURCE in their cdefs.h,
(b/c i don't understand where _ANSI_SOURCE comes from...)
but it looks _POSIX_C_SOURCE wins anyway.
for ease to see, i'd attach simplified their cdefs.h for their
visibility handling.

anyway, IIUC, newlib's behavior in regard this point looks not
equivalent to FreeBSD's...

Peace,

[-- Attachment #2: cdefs.h --]
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#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1
 #undef _POSIX_C_SOURCE
 #define _POSIX_C_SOURCE 199009
#endif

#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2
 #undef _POSIX_C_SOURCE
 #define _POSIX_C_SOURCE 199209
#endif

#ifdef _XOPEN_SOURCE
 #if _XOPEN_SOURCE - 0 >= 700
  #define __XSI_VISIBLE 700
  #undef _POSIX_C_SOURCE
  #define _POSIX_C_SOURCE 200809
 #elif _XOPEN_SOURCE - 0 >= 600
  #define __XSI_VISIBLE 600
  #undef _POSIX_C_SOURCE
  #define _POSIX_C_SOURCE 200112
 #elif _XOPEN_SOURCE - 0 >= 500
  #define __XSI_VISIBLE 500
  #undef _POSIX_C_SOURCE
  #define _POSIX_C_SOURCE 199506
 #endif
#endif

#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
 #define _POSIX_C_SOURCE 198808
#endif

#ifdef _POSIX_C_SOURCE
 #if _POSIX_C_SOURCE >= 200809
  #define __POSIX_VISIBLE 200809
  #define __ISO_C_VISIBLE 1999
 #elif _POSIX_C_SOURCE >= 200112
  #define __POSIX_VISIBLE 200112
  #define __ISO_C_VISIBLE 1999
 #elif _POSIX_C_SOURCE >= 199506
  #define __POSIX_VISIBLE 199506
  #define __ISO_C_VISIBLE 1990
 #elif _POSIX_C_SOURCE >= 199309
  #define __POSIX_VISIBLE 199309
  #define __ISO_C_VISIBLE 1990
 #elif _POSIX_C_SOURCE >= 199209
  #define __POSIX_VISIBLE 199209
  #define __ISO_C_VISIBLE 1990
 #elif _POSIX_C_SOURCE >= 199009
  #define __POSIX_VISIBLE 199009
  #define __ISO_C_VISIBLE 1990
 #else
  #define __POSIX_VISIBLE 198808
  #define __ISO_C_VISIBLE 0
 #endif
#else
 #if defined(_ANSI_SOURCE)
  #define __POSIX_VISIBLE 0
  #define __XSI_VISIBLE 0
  #define __BSD_VISIBLE 0
  #define __ISO_C_VISIBLE 1990
 #elif defined(_C99_SOURCE)
  #define __POSIX_VISIBLE 0
  #define __XSI_VISIBLE 0
  #define __BSD_VISIBLE 0
  #define __ISO_C_VISIBLE 1999
 #elif defined(_C11_SOURCE)
  #define __POSIX_VISIBLE 0
  #define __XSI_VISIBLE 0
  #define __BSD_VISIBLE 0
  #define __ISO_C_VISIBLE 2011
 #else
  #define __POSIX_VISIBLE 200809
  #define __XSI_VISIBLE 700
  #define __BSD_VISIBLE 1
  #define __ISO_C_VISIBLE 2011
 #endif
#endif

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