Errors while compiling 25.2rc2

Errors while compiling 25.2rc2

[Fabrice Popineau]

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I get errors when trying to compile the emacs-25 git branch on
Windows Subsystem for Linux, which is basically Ubuntu 16.04.

I get a bunch of errors like this :

  CC       careadlinkat.o
In file included from ../../emacs/src/conf_post.h:241:0,
                 from ../src/config.h:1917,
                 from ../../emacs/lib/careadlinkat.c:21:
./unistd.h: In function ‘rpl_pipe2’:
./unistd.h:1409:1: error: expected declaration specifiers before
‘_GL_ARG_NONNULL’
 _GL_FUNCDECL_RPL (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL
((1)));
 ^
./unistd.h:1410:1: error: storage class specified for parameter
‘_gl_cxxalias_dummy’
 _GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
 ^
./unistd.h:1415:1: error: storage class specified for parameter
‘_gl_cxxalias_dummy’
 _GL_CXXALIASWARN (pipe2);
 ^
./unistd.h:1415:1: error: redefinition of parameter ‘_gl_cxxalias_dummy’
./unistd.h:1410:1: note: previous definition of ‘_gl_cxxalias_dummy’ was
here
 _GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
 ^
./unistd.h:1538:1: error: storage class specified for parameter
‘_gl_cxxalias_dummy’
 _GL_CXXALIAS_SYS (readlink, ssize_t,
 ^
./unistd.h:1538:1: error: redefinition of parameter ‘_gl_cxxalias_dummy’
./unistd.h:1415:1: note: previous definition of ‘_gl_cxxalias_dummy’ was
here
 _GL_CXXALIASWARN (pipe2);
 ^
./unistd.h:1541:1: error: storage class specified for parameter
‘_gl_cxxalias_dummy’
 _GL_CXXALIASWARN (readlink);
 ^
GCC version :

fabrice@LOBSANG:/mnt/d/Source/emacs/build-emacs-ubuntu$ gcc --version
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
Copyright (C) 2015 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.


What could cause these problems ?

I know the platform may not be the primary target to support but still I'd
like to know what is happening there.

Thanks for any clue,

Fabrice

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Re: Errors while compiling 25.2rc2

[Eli Zaretskii]

> From: Fabrice Popineau <fabrice.popineau@gmail.com>
> Date: Thu, 2 Mar 2017 23:01:38 +0100
> 
> fabrice@LOBSANG:/mnt/d/Source/emacs/build-emacs-ubuntu$ gcc --version
> gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
> Copyright (C) 2015 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.
> 
> What could cause these problems ?
> 
> I know the platform may not be the primary target to support but still I'd like to know what is happening there.

Is WSL stable enough for us to start caring for it?  Last I looked it
was a moving target, with features added and changed all the time.
Trying to chase that could be a gratuitous sink of our resources.

I'm sure Paul will know what causes these problems, but I'm
questioning whether we should do that, before WSL stabilizes and is
released as a product suitable for production work.

Thanks.

Re: Errors while compiling 25.2rc2

[Fabrice Popineau]

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2017-03-03 8:55 GMT+01:00 Eli Zaretskii <eliz@gnu.org>:

> > From: Fabrice Popineau <fabrice.popineau@gmail.com>
> > Date: Thu, 2 Mar 2017 23:01:38 +0100
> >
> > fabrice@LOBSANG:/mnt/d/Source/emacs/build-emacs-ubuntu$ gcc --version
> > gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
> > Copyright (C) 2015 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.
> >
> > What could cause these problems ?
> >
> > I know the platform may not be the primary target to support but still
> I'd like to know what is happening there.
>
> Is WSL stable enough for us to start caring for it?  Last I looked it
> was a moving target, with features added and changed all the time.
> Trying to chase that could be a gratuitous sink of our resources.
>
>
I would agree with you, unfortunately, I tried also to do the same thing in
a genuine Ubuntu release running in a vm
and I got the exact same result, which is a bit annoying.

I am at commit 6e788ef0 on emacs-25 branch.

So either I am doing something very stupid or there is a problem on the
branch.

Fabrice

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Re: Errors while compiling 25.2rc2

[Angelo Graziosi]

Fabrice Popineau wrote:

> I am at commit 6e788ef0 on emacs-25 branch.

I tried with the official RC2 
(http://git.savannah.gnu.org/cgit/emacs.git/snapshot/emacs-25.2-rc2.tar.gz) 
and it builds and seems to work..

Here is W10 Pro (build 14393.693) with WSL:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.5 LTS
Release:        14.04
Codename:       trusty

and GCC version 4.8.4.

As you perhaps remember from previous discussions, in WSL I need this

$ echo 0 | sudo tee /proc/sys/kernel/randomize_va_space

before to start the Emacs build.


Ciao,
   Angelo.

Re: Errors while compiling 25.2rc2

[Fabrice Popineau]

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2017-03-03 15:20 GMT+01:00 Angelo Graziosi <angelo.graziosi@alice.it>:

> Fabrice Popineau wrote:
>
> I am at commit 6e788ef0 on emacs-25 branch.
>>
>
> I tried with the official RC2 (http://git.savannah.gnu.org/c
> git/emacs.git/snapshot/emacs-25.2-rc2.tar.gz) and it builds and seems to
> work..
>
> Thanks Angelo.

Seems I had a problem with 'git pull' telling me I am up to date with the
emacs-25 branch, and that looking closer, it is not the case :-/

So sorry everybody for the noise (and sometimes, git is a PIA !)

Fabrice

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