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Date:	Mon, 14 Dec 2015 13:57:57 +0900
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Subject:	Re: __STRICT_ANSI__ and stdio.h
From:	KIMURA Masaru <hiyuh DOT root AT gmail DOT com>
To:	cygwin AT cygwin DOT com
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oops!
forgot to attach p.c, so resending now...

> Hi,
>
>>> is cygwin's __STRICT_ANSI__ and stdio.h behavior not so compatible to g=
libc's?
>>> especially, i meant routines in POSIX 1003.1:2001 (popen(), pclose(), e=
tc).
>>> for a specific example, see a cparser issue[1] i submitted.
>>>
>>
>> Cygwin isn't wrong.  __STRICT_ANSI__ doesn't mix with POSIX.
>> __STRICT_ANSI__ definitions is what you should look at for the defined
>> API; not POSIX 1003.1:2001.
>
> then why does glibc look accepting -std=3Dc99 -D_POSIX_C_SOURCE=3D200809L?
> so you mean linux (maybe glibc?) is wrong and cygwin (maybe newlib?) is r=
ight?
>
> w/ attached source that uses popen()/pclose() via gcc -std=3Dc99,
>
> on cygwin (maybe newlib?), i got,
> p.c: In function =E2=80=98main=E2=80=99:
> p.c:5:2: warning: implicit declaration of function =E2=80=98popen=E2=80=
=99
> [-Wimplicit-function-declaration]
>   FILE *pp =3D popen("cat", "w");
>   ^
> p.c:5:13: warning: initialization makes pointer from integer without a ca=
st
>   FILE *pp =3D popen("cat", "w");
>              ^
> p.c:12:3: warning: implicit declaration of function =E2=80=98pclose=E2=80=
=99
> [-Wimplicit-function-declaration]
>    int err =3D pclose(pp);
>    ^
>
> on linux (maybe glibc?), i got,
> p.c: In function 'main':
> p.c:4:14: warning: unused parameter 'argc' [-Wunused-parameter]
>  int main(int argc, char *argv[]) {
>               ^
> p.c:4:26: warning: unused parameter 'argv' [-Wunused-parameter]
>  int main(int argc, char *argv[]) {
>
>                           ^                          ^
>
> Peace,

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