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Date: Thu, 31 Mar 2016 16:48:41 +0200
From: Christian Neukirchen <chneukirchen@...il.com>
To: musl@...ts.openwall.com
Subject: Re: Defining __STDC_ISO_10646__, __STDC_IEC_559__ and so on with musl?
Szabolcs Nagy <nsz@...t70.net> writes:
> * Masanori Ogino <masanori.ogino@...il.com> [2016-03-31 20:34:22 +0900]:
>> The C standard specifies some predefined macros to determine
>> implementation-dependent characteristics, e.g. __STDC_ISO_10646__.
>> However, it seems that those macros are omitted with musl-based
>> toolchains. (I read cross-musl patches and tested with Gentoo's musl
>> toolchain.)
>>
>> glibc handles them using a small header file named stdc-predef.h and a
>
> yes, this is the right approach we just never got
> around adding it. i think it should contain
>
> #if __GCC_IEC_559 > 0
> #define __STDC_IEC_559__ 1
> #endif
>
> #if __GCC_IEC_559_COMPLEX > 0
> #define __STDC_IEC_559_COMPLEX__ 1
> #endif
>
> #define __STDC_ISO_10646__ 201505L
What about clang? I don't see similar predefined macros there.
--
Christian Neukirchen <chneukirchen@...il.com> http://chneukirchen.org
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