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From: Lei Zhang <zhanglei.april@gmail.com>
To: Luca Barbato <lu_zero@gentoo.org>
Cc: gentoo-musl@lists.gentoo.org
Subject: Re: [gentoo-musl] [GSoC] _GNU_SOURCE in C++
Date: Thu, 16 Jun 2016 11:36:15 +0800	[thread overview]
Message-ID: <CAOYuCc3Q69t-iLG837Virh4iOjZpsTHa6g_B3+9_UaqwFC-vOw@mail.gmail.com> (raw)
In-Reply-To: <19f9f66f-5dd4-786a-3b29-0a57c407548e@gentoo.org>

[-- Attachment #1: Type: text/plain, Size: 1016 bytes --]

2016-06-15 17:36 GMT+08:00 Luca Barbato <lu_zero@gentoo.org>:
> On 15/06/16 03:45, Lei Zhang wrote:
>> This issue is probably not as simple as I thought. Supposing C++
>> header iostream depends on some non-standard functions from stdio.h,
>> it may look like:
>>
>> // iostream
>> #define _BSD_SOURCE
>> #include <stdio.h>
>> #undef _BSD_SOURCE
>> ...
>>
>> But if a user writes some code like:
>>
>
> Makes a mistake.
>
> You should not mix C headers and C++ headers like that =) There is a
> reason why you have <cstdio> and such =)
>
> The correct visibility macros can be extracted by reading the man pages
> for each of those functions.
>
> Please make the full list of them, once it is known we can discuss where
> to put them.

Attached is what I've got so far.

Some of them are not documented in man pages, so I checked their
declarations in musl's headers. Functions strtold_l, strtoll_l and
strtoull_l are not available in musl, but libc++ is smart enough to
not use them when linked against musl.


Lei

[-- Attachment #2: libcxx-nonstd-funcs.txt --]
[-- Type: text/plain, Size: 1019 bytes --]

# _ISOC11_SOURCE
aligned_alloc

# _BSD_SOURCE | _SVID_SOURCE | _ISOC99_SOURCE | _XOPEN_SOURCE >= 600 \
# | _POSIX_C_SOURCE >= 200112L
atoll           
strtoll        
strtoull      

# _ISOC99_SOURCE | _XOPEN_SOURCE >= 600 | _POSIX_C_SOURCE >= 200112L
_Exit     
isblank   
iswblank  
llabs     
lldiv     
strtof    
strtold   
vfscanf   
vscanf    
vsscanf   

# _ISOC99_SOURCE | _XOPEN_SOURCE >= 500 | _POSIX_C_SOURCE >= 200112L
fwide         
fwprintf      
fwscanf       
swprintf      
vfwprintf     
vswprintf     

# _BSD_SOURCE | _ISOC99_SOURCE | _XOPEN_SOURCE >= 500 \
# | _POSIX_C_SOURCE >= 200112L
snprintf      
vsnprintf    

# _XOPEN_SOURCE >= 700
uselocale

# _GNU_SOURCE | _BSD_SOURCE
vasprintf

# _BSD_SOURCE | _SVID_SOURCE | _XOPEN_SOURCE
isascii

# _POSIX_SOURCE | _POSIX_C_SOURCE | _XOPEN_SOURCE | _GNU_SOURCE | _BSD_SOURCE
iswalpha_l
iswblank_l
iswcntrl_l
iswdigit_l
iswlower_l
iswprint_l
iswpunct_l
iswspace_l
iswupper_l
iswxdigit_l

# _GNU_SOURCE (absent in musl)
strtold_l
strtoll_l
strtoull_l

  parent reply	other threads:[~2016-06-16  3:36 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-14  7:44 [gentoo-musl] [GSoC] _GNU_SOURCE in C++ Lei Zhang
2016-06-14  8:10 ` Felix Janda
2016-06-14  8:28   ` Lei Zhang
     [not found]     ` <4228046b-02f1-1b65-f56d-6e79347e4390@gentoo.org>
2016-06-14  9:17       ` Lei Zhang
     [not found]         ` <20302d1d-92ff-1c4b-8939-08894c3589ca@gentoo.org>
2016-06-14  9:35           ` Lei Zhang
     [not found]             ` <8e7cafd9-97c7-6ca1-ad3f-95bdb0060ce0@gentoo.org>
2016-06-14 11:48               ` Lei Zhang
     [not found]                 ` <e1f362ee-7755-9a54-78e3-19e0733ebd3b@gentoo.org>
2016-06-15  1:45                   ` Lei Zhang
     [not found]                     ` <19f9f66f-5dd4-786a-3b29-0a57c407548e@gentoo.org>
2016-06-16  3:36                       ` Lei Zhang [this message]
     [not found]                         ` <1c93fa87-e2c3-2737-1222-ae93003e21ad@gentoo.org>
2016-06-16 12:47                           ` Lei Zhang
     [not found]                             ` <7d6fa9d6-1134-1d2a-1d06-33029b82429d@gentoo.org>
2016-06-16 13:42                               ` Lei Zhang
2016-06-17 11:12                                 ` Lei Zhang
2016-06-17 11:13                                   ` Lei Zhang
     [not found]                                   ` <37117cc0-2af1-306d-6ec5-d8d37d8c588c@gentoo.org>
2016-06-17 12:44                                     ` Lei Zhang
2016-06-21  4:54                                       ` Lei Zhang
2016-06-22 13:21                                         ` Lei Zhang
2016-06-22 13:54                                         ` Lei Zhang
2016-06-22 14:02                                           ` Lei Zhang
2016-06-14  9:55     ` Felix Janda
     [not found] ` <20160615033804.GA2473@gmail.com>
2016-06-15  3:55   ` Lei Zhang

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