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From:	"Louis Santillan (lpsantil AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Date:	Wed, 25 Jan 2017 17:29:51 -0800
Message-ID:	<CAB9Rao-fsSYtRCEEMOD4NbEnHUiOkmCt8a8tZx6__ZHZrQbABw@mail.gmail.com>
Subject:	Re: micropython djgpp build
To:	"djgpp AT delorie DOT com" <djgpp AT delorie DOT com>
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--gc-sections functionality could probably be replaced by utilizing
`strip` and/or using deep object inspection with `nm` or other tools.

On Wed, Jan 25, 2017 at 4:12 PM, multisosnooley AT gmail DOT com [via
djgpp AT delorie DOT com] <djgpp AT delorie DOT com> wrote:
> On Wednesday, January 25, 2017 at 6:19:02 PM UTC+3, Ozkan Sezer (sezeroz AT gmail DOT com) [via djgpp AT delorie DOT com] wrote:
>> On 1/25/17, multisosnooley AT gmail DOT com [via djgpp AT delorie DOT com]
>> <djgpp AT delorie DOT com> wrote:
>> > On Wednesday, January 25, 2017 at 3:07:30 PM UTC+3, Ozkan Sezer
>> > (sezeroz AT gmail DOT com) [via djgpp AT delorie DOT com] wrote:
>> >> On 1/25/17, multisosnooley AT gmail DOT com [via djgpp AT delorie DOT com]
>> >> <djgpp AT delorie DOT com> wrote:
>> >> > Hi!
>> >> >
>> >> > We have a problem with building micropython with djgpp with
>> >> > '--gc-sections'
>> >> > flag active. It segfaults on linking.
>> >> > More info:
>> >> > https://github.com/micropython/micropython/issues/2560
>> >> > https://github.com/micropython/micropython/pull/2644
>> >> >
>> >>
>> >> Possibly related to this?
>> >> https://sourceware.org/bugzilla/show_bug.cgi?id=20401
>> >>
>> >> Which binutils version are you using?
>> >
>> > I don't exactly now which version of binutils was used in previous cases,
>> > but right now newest available is
>> > http://www.delorie.com/pub/djgpp/deleted/v2gnu/bnu226sr3.zip and in bug you
>> > reference fix comes in 2.27, but it is not released yet. Or?
>> >
>>
>> There is a djgpp port of 2.27:
>> http://www.delorie.com/pub/djgpp/current/v2gnu/bnu227s.zip
>> http://www.delorie.com/pub/djgpp/current/v2gnu/bnu227b.zip
>> Besides, the fix is (should be) applicable to 2.26 too.
>>
>> Looking at the links you provided:
>> https://github.com/micropython/micropython/issues/2560#issuecomment-260157891
>> mentions binutils 2.20.1.20100303: if that is version giving you the
>> segfault then I don't know, because but as far as I remember the
>> --gc-sections support for coff and pe targets began with
>> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=0f088b2a
>> and that corresponds to either 2.25.1 or 2.26
>
> Just tested:
>
> [poh ~/tmp/upython]$ cat test.c
> int main () { return 0; }
> [poh ~/tmp/upython]$ djgpp-6.2.0/bin/i586-pc-msdosdjgpp-gcc -Wl,--gc-sections test.c
> collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core dumped
> compilation terminated.
> [poh ~/tmp/upython]$ djgpp-6.2.0/bin/i586-pc-msdosdjgpp-gcc --version
> i586-pc-msdosdjgpp-gcc (GCC) 6.2.0
> Copyright (C) 2016 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> [poh ~/tmp/upython]$ djgpp-6.2.0/bin/i586-pc-msdosdjgpp-ld --version
> GNU ld (GNU Binutils) 2.26.20160125
> Copyright (C) 2015 Free Software Foundation, Inc.
> This program is free software; you may redistribute it under the terms of
> the GNU General Public License version 3 or (at your option) a later version.
> This program has absolutely no warranty.
>
> Will try to test with 2.27

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