Re: cygwin build

[Thomas Wolff <towo@towo.net>]

Hi Jon,

Am 06.08.2023 um 20:53 schrieb Jon Turney:
> On 05/08/2023 19:18, Thomas Wolff wrote:
>>
>>
>> Am 03.08.2023 um 15:12 schrieb Jon Turney:
>>> On 03/08/2023 09:21, Thomas Wolff wrote:
>>>> Am 02.08.2023 um 10:09 schrieb Corinna Vinschen:
>>>>> On Aug  2 08:36, Thomas Wolff wrote:
>>>>>>
>>>>>> Am 01.08.2023 um 23:27 schrieb Corinna Vinschen:
>>>>>>> On Aug  1 23:05, Thomas Wolff wrote:
>>>>>>>> I took some of the latest cygwin snapshots (by the way, there 
>>>>>>>> are no newer
>>>>>>>> ones on the snapshots page):
>>>>>>> Snapshots are no longer produced.  You should download the latest
>>>>>>> test versions via setup.
>>>>>> So what if I need an older version?
>>>>> It's all documented:
>>>>>
>>>>> https://cygwin.com/git.html
>>>>> https://cygwin.com/faq.html#faq.programming.building-cygwin
>>>> Thanks. Actually package mingw zlib was missing (when I installed 
>>>> it, it got mistargeted to my parallel test installation).
>>>> It now worked, kind of, with some build errors after producing the 
>>>> dll.
>>>
>>> Nobody can take any useful action about those "build errors" if you 
>>> keep them secret.
>>>
>> Sure, I just mentioned it and didn't post details as it wasn't 
>> essential for the discussed issue. Anyway, here are the final error 
>> message I often encounter:
>>
>> make[5]: Entering directory 
>> '/cygdrive/c/tmp/newlib-cygwin/build/x86_64-pc-cygwin/winsup/utils'
>>    CXXLD    dumper.exe
>> /usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld: 
>> /usr/lib/gcc/x86_64-pc-cygwin/11/../../../../lib/libbfd.a(compress.o): 
>> in function `decompress_contents':
> Ah, right.
>
> This is a problem with the primitive time-travel technology you are 
> using.
This was an error when building the current version, no time travel 
involved.
>
> dumper relies on libbfd, which since binutils 2.40 relies on zstd.
Takashi suggested to install libzstd-devel which fixed the issue. It's 
not mentioned in the dependency list at 
https://cygwin.com/faq.html#faq.programming.building-cygwin where I'd 
suggest to add it.
By the way, I'm wondering why the build process needs the manual steps 
and quirks mentioned there. A while ago, I'd just run configure and make 
in the main newlib-cygwin directory. Well it wouldn't allow to make 
another build for 32 bit in the same tree then, but that doesn't exist 
anymore, so what.
As a side note, I'd also suggest to check for dependencies in the 
configure script, to facilitate an early hint. No package I ever built 
seems to do that but it would really help.
Thomas

>
> bfd doesn't provide a .pc file, so the dependencies are explicitly 
> listed in our makefile.
>
> You'll either needs to backport the commit [1] which adds zstd to the 
> link line to fix this, or also roll back binutils to the version which 
> was current when this built...
>
> [1] 
> https://cygwin.com/git/?p=newlib-cygwin.git;a=commitdiff;h=1387ea9f984d5a7aa096a66b67d61dc2cc565d21;hp=588624da2b0a921c7e72d12d19c2ac3321de0326
>