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From: Pavel M <pavel.morozkin@gmail.com>
Date: Tue, 10 May 2022 21:09:16 +0300
Message-ID: <CAL9Mx1uj7ZYaf9Z3Tu43BtWpZ-U1muofWzr3aXUEj9uQnixtnw@mail.gmail.com>
Subject: Re: Issue: CMPLX is not defined
To: joel@rtems.org
Cc: Newlib <newlib@sourceware.org>
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Thanks! Now I can compile clean (GCC only, Clang produces "error: use of
unknown builtin '__builtin_complex'").

On Tue, 10 May 2022 at 18:49, Joel Sherrill <joel@rtems.org> wrote:

>
>
> On Tue, May 10, 2022 at 10:40 AM Pavel M <pavel.morozkin@gmail.com> wrote:
>
>> Hi all,
>>
>> Issue: CMPLX is not defined.
>>
>> $ cat t649.c
>> #if __STDC_NO_COMPLEX__ != 1
>> #include <complex.h>
>> #ifndef CMPLX
>> #error
>> #endif
>> #endif
>>
>> $ gcc t649.c -std=c11 -pedantic -Wall -Wextra
>> t649.c:4:2: error: #error
>>     4 | #error
>>       |  ^~~~~
>>
>> C11:
>> > 7.3.9.3 The CMPLX macros
>>
>> Please fix.
>>
>
> If you really need these, they are simple to implement and patches are
> always welcomed. This is the entirety of the implementation for glibc:
>
> #if defined __USE_ISOC11 && __GNUC_PREREQ (4, 7)
> /* Macros to expand into expression of specified complex type.  */
> # define CMPLX(x, y) __builtin_complex ((double) (x), (double) (y))
> # define CMPLXF(x, y) __builtin_complex ((float) (x), (float) (y))
> # ifndef __NO_LONG_DOUBLE_MATH
> #  define CMPLXL(x, y) __builtin_complex ((long double) (x), (long double)
> (y))
> # endif
> #endif
>
> Should be a simple patch to complex.h
>
> --joel
>