Re: [gentoo-dev] musl doesn't provide execinfo.h

[Anthony G. Basile]

On 3/27/20 3:17 PM, Alexis Ballier wrote:
> On Fri, 2020-03-27 at 08:03 -0400, Anthony G. Basile wrote:
>> On 3/26/20 9:25 PM, Joshua Kinard wrote:
>>> On 3/23/2020 04:21, Jaco Kroon wrote:
>>>> Hi,
>>>>
>>>> https://bugs.gentoo.org/713668 relates.
>>>>
>>>>  * Searching for /usr/include/execinfo.h ...
>>>> sys-libs/glibc-2.29-r7 (/usr/include/execinfo.h)
>>>>
>>>> As I see I can either add an explicit depend on glibc which I'd
>>>> prefer
>>>> not to.  Or someone from the musl team could possibly assist on
>>>> how to
>>>> get the backtrace() set of calls on musl please?
>>>>
>>>> Alternatively I need to add a test and simply path debug.c to
>>>> only
>>>> provide stub function for print_backtrace(FILE *fp) that just
>>>> does
>>>> fprintf(fp, "No backtrace() available to print a backtrace.\n");
>>>>
>>>> Suggestions?
>>>>
>>>> Kind Regards,
>>>> Jaco
>>>
>>> Some quick searching on google, it looks like the cleanest fix for
>>> that bug
>>> is dahdi-tools needs to be patched to only include execinfo.h or
>>> only use
>>> backtrace() on glibc-based systems, and that patch then sent to the
>>> dahdi-tools upstream developers for inclusion in a future
>>> release.  That
>>> way, we're not dragging that patch around forever in the tree or in
>>> the musl
>>> overlay.
>>>
>>> It also doesn't look like musl itself will ever implement
>>> execinfo.h or
>>> backtrace(), per this message in 2015 from the lead musl developer:
>>> https://www.openwall.com/lists/musl/2015/04/09/3
>>>
>>
>> Correct.  I've been adding -standalone packages to provide for
>> features
>> like fts, obstack, argp,etc. which are bundled into glibc but not
>> really
>> under the POSIX standard.
>>
>> So either we patch packages to turn off backtrace() or we add
>> libunwind-standalone to the tree.
>>
>
>
> BTW, we had libexecinfo for fbsd, which seems also present in alpine:
> https://pkgs.alpinelinux.org/package/edge/main/x86/libexecinfo
>
>


Had?  Is it in the tree now or should I look into adding it?

-- 
Anthony G. Basile, Ph.D.
Gentoo Linux Developer [Hardened]
E-Mail    : blueness@g.o
GnuPG FP  : 1FED FAD9 D82C 52A5 3BAB  DC79 9384 FA6E F52D 4BBA
GnuPG ID  : F52D4BBA