cygwin can not be compiled with gcc 8.3.0

cygwin can not be compiled with gcc 8.3.0

[Biswapriyo Nath]

make command shows:

```
In file included from /d/newlib-cygwin/winsup/cygwin/aio.cc:10:
/d/newlib-cygwin/winsup/cygwin/path.h: In member function 'path_conv&
path_conv::eq_worker(const path_conv&, const char*)':
/d/newlib-cygwin/winsup/cygwin/path.h:316:33: error: 'void*
memcpy(void*, const void*, size_t)' writing to an object of type
'class path_conv' with no trivial copy-assignment; use copy-assignment
or copy-initialization instead [-Werror=class-memaccess]
     memcpy (this, &pc, sizeof pc);
                                 ^
/d/newlib-cygwin/winsup/cygwin/path.h:133:7: note: 'class path_conv'
declared here
 class path_conv
       ^~~~~~~~~
cc1plus: all warnings being treated as errors
make[3]: *** [/d/newlib-cygwin/winsup/cygwin/../Makefile.common:41:
aio.o] Error 1
```

Am I doing anything wrong? I have installed all the required
packges[1]. It will be better if cygwin code is fixed for gcc 8.3.0
instead of downgrading gcc version.

[1]: https://cygwin.com/faq.html#faq.programming.building-cygwin

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Re: cygwin can not be compiled with gcc 8.3.0

[Houder]

On Fri, 5 Jul 2019 13:15:46, Biswapriyo Nath  wrote:
[snip]

> Am I doing anything wrong? I have installed all the required

.. uhm, sort of ... [1] is deprecated

cygwin is built using cygport ...

 - install the cygport package (subsequently invoke "man cygport" from bash)
 - using cygport to build cygwin requires the cygwin.cygport file in the Cygwin
   source tarball (will not use gcc 8.3.0)
 - extract the source tarball, then ...

Reminder (zie man cygport)
cygport <options> cygwin.cygport prep           create working directory, unpack sources and apply patches
cygport <options> cygwin.cygport compile        run all compiliation steps (including configure)
cygport <options> cygwin.cygport install        installinto a DESTDIR, and run post-installation steps
cygport <options> cygwin.cygport package        create binary and source package
cygport <options> cygwin.cygport finish         delete working directory

Regards,
Henri

> packges[1]. It will be better if cygwin code is fixed for gcc 8.3.0
> instead of downgrading gcc version.
> 
> [1]: https://cygwin.com/faq.html#faq.programming.building-cygwin


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Re: cygwin can not be compiled with gcc 8.3.0

[Houder]

On Fri, 05 Jul 2019 10:21:49, Houder  wrote:
[snip]

> cygwin is built using cygport ...
> 
>  - install the cygport package (subsequently invoke "man cygport" from bash)
>  - using cygport to build cygwin requires the cygwin.cygport file in the Cygwin
>    source tarball (will not use gcc 8.3.0)

Sorry. I should have written: gcc is invoked with different options when using
cygport, among them: -std=gnu++98 ...

>  - extract the source tarball, then ...
> 
> Reminder (zie man cygport)
> cygport <options> cygwin.cygport prep           create working directory, unpack sources and apply patches
> cygport <options> cygwin.cygport compile        run all compiliation steps (including configure)
> cygport <options> cygwin.cygport install        installinto a DESTDIR, and run post-installation steps
> cygport <options> cygwin.cygport package        create binary and source package
> cygport <options> cygwin.cygport finish         delete working directory
> 
> Regards,
> Henri


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Re: cygwin can not be compiled with gcc 8.3.0

[Biswapriyo Nath]

> .. uhm, sort of ... [1] is deprecated

If it is deprecated then why the FAQ is not fixed yet?

> cygwin is built using cygport ...

Is there any docs about it? I don't find the cygwin.cygport file in source
tree. Also I don't use source tarballs, git is my first choice. Also the
configure script or Makefile didn't warn me that I've not that cygport
package/script.

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Re: cygwin can not be compiled with gcc 8.3.0

[Marco Atzeri]

Am 05.07.2019 um 19:03 schrieb Biswapriyo Nath:
>> .. uhm, sort of ... [1] is deprecated
>
> If it is deprecated then why the FAQ is not fixed yet?
>
>> cygwin is built using cygport ...
>
> Is there any docs about it? I don't find the cygwin.cygport file in source
> tree. Also I don't use source tarballs, git is my first choice. Also the
> configure script or Makefile didn't warn me that I've not that cygport
> package/script.
>

it is included in the source package, as reported on

https://cygwin.com/packages/x86/cygwin-src/cygwin-3.0.7-1-src

cygwin-src: The UNIX emulation engine (source)

     2019-04-30 18:07           0 cygwin-3.0.7-1.src/
     2019-04-30 18:07        3090 cygwin-3.0.7-1.src/cygwin.cygport
     2019-04-30 18:07    13425098
cygwin-3.0.7-1.src/newlib-cygwin-3.0.7.tar.bz2

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Re: cygwin can not be compiled with gcc 8.3.0

[Biswapriyo Nath]

Now I'm sure that the issue in cygwin source code. I've installed all the
components. Also find same issue[1] provided a year ago. Cygwin needs some
papering[2] for gcc 8.3.0.


[1]: https://github.com/Tencent/rapidjson/issues/1246

[2]:
https://github.com/mintty/mintty/commit/f7df4adf1775638b2aa75defb01822c0c21d6bcd

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Re: cygwin can not be compiled with gcc 8.3.0

[Sam Edge]

On 05/07/2019 21:46, Biswapriyo Nath wrote:
> Now I'm sure that the issue in cygwin source code. I've installed all the
> components. Also find same issue[1] provided a year ago. Cygwin needs some
> papering[2] for gcc 8.3.0.
>
Hi again.

I don't want to sound mean (https://cygwin.com/acronyms/#WJM) but ...

Since you're the one who wants to build Cygwin using gcc 8.3.0, then why
don't you create appropriate patches and submit them for consideration?

https://cygwin.com/acronyms/#PTC and all that.

Regards.



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Re: cygwin can not be compiled with gcc 8.3.0

[Sam Edge]

On 05/07/2019 18:03, Biswapriyo Nath wrote:
>
> If it is deprecated then why the FAQ is not fixed yet?
>
As is normal, I'll think you'll find https://cygwin.com/acronyms/#PTC.



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Re: cygwin can not be compiled with gcc 8.3.0

[Houder]

On Fri, 5 Jul 2019 22:33:20, Biswapriyo Nath  wrote:
[snip]

> > cygwin is built using cygport ...
> 
> Is there any docs about it? I don't find the cygwin.cygport file in source
> tree. Also I don't use source tarballs, git is my first choice. Also the
> configure script or Makefile didn't warn me that I've not that cygport
> package/script.

Documents about using cygport? Well, sort of ...
 - https://cygwin.com/packages.html
 - https://cygwin.com/packaging-contributors-guide.html
-
 - https://cygwinports.github.io/cygport/cygport.1.html
 - https://github.com/cygwinports/cygport/blob/master/README
 - https://cygwinports.github.io/cygport/toc_index.html

Using (Cygwin) git as starting point?
 - https://cygwin.com/git/gitweb.cgi?p=newlib-cygwin.git
 - git is 'bleeding edge' (unstable by definition)

cygwin.cygport file?
 - No, not present in git ... (not present in the git for newlib-cygwin)
 - a cygwin source tarball (to be found on any Cygwin mirror) is composed
   of a tarball, which represents git at a 'specific moment' in time plus
   the cygwin.cygport file
 - specific moment? Look for the 'cygwin-3_x_y' tags in git ...

mirrors: https://cygwin.com/mirrors.html

cygport build/ cygport package
 - the cygport build system is basically a wrapper around autoconf etc.
   (and build systems like cmake)
 - i.e. configure, make (Makefile) do not know about cygport

Regards,
Henri


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Re: cygwin can not be compiled with gcc 8.3.0

[Brian Inglis]

On 2019-07-06 02:24, Houder wrote:
> On Fri, 5 Jul 2019 22:33:20, Biswapriyo Nath  wrote:
>>> cygwin is built using cygport ...
>> Is there any docs about it? I don't find the cygwin.cygport file in source
>> tree. Also I don't use source tarballs, git is my first choice. Also the
>> configure script or Makefile didn't warn me that I've not that cygport
>> package/script.
> Documents about using cygport? Well, sort of ...
>  - https://cygwin.com/packages.html
>  - https://cygwin.com/packaging-contributors-guide.html
>  - https://cygwinports.github.io/cygport/cygport.1.html
>  - https://github.com/cygwinports/cygport/blob/master/README
>  - https://cygwinports.github.io/cygport/toc_index.html
> Using (Cygwin) git as starting point?
>  - https://cygwin.com/git/gitweb.cgi?p=newlib-cygwin.git
>  - git is 'bleeding edge' (unstable by definition)
> cygwin.cygport file?
>  - No, not present in git ... (not present in the git for newlib-cygwin)
>  - a cygwin source tarball (to be found on any Cygwin mirror) is composed
>    of a tarball, which represents git at a 'specific moment' in time plus
>    the cygwin.cygport file
>  - specific moment? Look for the 'cygwin-3_x_y' tags in git ...
> mirrors: https://cygwin.com/mirrors.html
> cygport build/ cygport package
>  - the cygport build system is basically a wrapper around autoconf etc.
>    (and build systems like cmake)
>  - i.e. configure, make (Makefile) do not know about cygport

Files like ....cygport and ....hint are for packaging and appear only in
packaged sources not git repos.

Install cygport package and dependencies then:

	$ cygstart /usr/share/doc/cygport/html/manual/index.html
or
	https://cygwinports.github.io/cygport/

There are also source snapshots after Cygwin or newlib patches:

	https://cygwin.com/snapshots/
e.g.
	https://cygwin.com/snapshots/x86_64/cygwin-20190628-src.tar.xz

Using cygport makes it relatively trivial to build upstream packages, from
standard upstream mirrors or repos; using standard autotools, or configure and
make; cross building libraries for Mingw; addon modules for girepository, lua,
ocaml, perl, php, python2, python3, R, ruby, tcl, tex, vala; GUI libraries for
widget sets like qt and wx; or desktop window manager environments like GNOME,
KDE, LXDE, MATE, XFCE.

Whereas cygport automates a lot of the standard upstream source download, build
and package requirements, and Cygwin package repo upload, on the packager
maintainer client; calm automates a lot of the standard uploaded Cygwin package
repo checks, and maintenance of setup.ini entries, on the package repo primary
server.
Many source package builds also generate ...-debuginfo packages as well as
binary packages for both architectures, so there are three packages added to
each of the arch repos.
Library packages may also generate separate ...-devel packages for each arch to
support developer APIs, as well as the cyg....dlls in the binary packages.

-- 
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Re: cygwin can not be compiled with gcc 8.3.0

[Ken Brown]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="utf-8", Size: 400 bytes --]

On 7/5/2019 3:45 AM, Biswapriyo Nath wrote:
> It will be better if cygwin code is fixed for gcc 8.3.0
> instead of downgrading gcc version.

This is now fixed.

Ken
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