Error when building from master branch

Error when building from master branch

[Kaushal Modi]

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Hello,

When building emacs from master branch, I get the below error:

OS: CentOS Linux release 7.6.1810 (Core)

Other than --prefix, my configure switches are "--with-modules
--with-harfbuzz --with-imagemagick".

I tried running "make bootstrap" and still got the same error.

=====
In file included from /usr/lib/glib-2.0/include/glibconfig.h:9,
                 from /usr/include/glib-2.0/glib/gtypes.h:32,
                 from /usr/include/glib-2.0/glib/galloca.h:32,
                 from /usr/include/glib-2.0/glib.h:30,
                 from /usr/include/gtk-3.0/gdk/gdkconfig.h:13,
                 from /usr/include/gtk-3.0/gdk/gdk.h:30,
                 from /usr/include/gtk-3.0/gtk/gtk.h:30,
                 from xterm.h:49,
                 from emacsgtkfixed.c:25:
emacsgtkfixed.c: In function ‘emacs_fixed_get_type’:
emacsgtkfixed.c:51:1: error: size of array
‘_GStaticAssertCompileTimeAssertion_3’ is negative
   51 | G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
      | ^~~~~~~~~~~~~
emacsgtkfixed.c:51:1: error: size of array
‘_GStaticAssertCompileTimeAssertion_4’ is negative
   51 | G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
      | ^~~~~~~~~~~~~
emacsgtkfixed.c:51:1: error: size of array
‘_GStaticAssertCompileTimeAssertion_5’ is negative
   51 | G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
      | ^~~~~~~~~~~~~
make[2]: *** [emacsgtkfixed.o] Error 1
=====

--
Kaushal Modi

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Re: Error when building from master branch

[Paul Eggert]

On 7/12/20 10:48 AM, Kaushal Modi wrote:

> emacsgtkfixed.c: In function ‘emacs_fixed_get_type’:
> emacsgtkfixed.c:51:1: error: size of array
> ‘_GStaticAssertCompileTimeAssertion_3’ is negative
>     51 | G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
>        | ^~~~~~~~~~~~~

I'm not seeing the problem on Fedora 31.

My guess is that your pkg-config setup doesn't match your libraries. This sort 
of thing can be a pain to debug. Possibly you can work around the problem by 
setting PKG_CONFIG_LIBDIR in your environment.

Re: Error when building from master branch

[Kaushal Modi]

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On Sun, Jul 12, 2020 at 2:36 PM Paul Eggert <eggert@cs.ucla.edu> wrote:

> On 7/12/20 10:48 AM, Kaushal Modi wrote:
>
> > emacsgtkfixed.c: In function ‘emacs_fixed_get_type’:
> > emacsgtkfixed.c:51:1: error: size of array
> > ‘_GStaticAssertCompileTimeAssertion_3’ is negative
> >     51 | G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
> >        | ^~~~~~~~~~~~~
>
> I'm not seeing the problem on Fedora 31.
>
> My guess is that your pkg-config setup doesn't match your libraries. This
> sort
> of thing can be a pain to debug. Possibly you can work around the problem
> by
> setting PKG_CONFIG_LIBDIR in your environment.
>

Hello Paul,

Sorry for the late reply. I was waiting to find some time so that I could
do a deep-dive into this issue.

I spent few hours on this today, but couldn't get emacs to build on CentOS
7. I tried with the default pkg-config 0.27.1. That failed with the same
error.

Then I installed pkg-config 0.28.0 (which worked well for me on RHEL 6.8),
but the same error using that.

And then the same thing with pkg-config 0.29.2 as well.

I also tried out your suggestion to set the env var PKG_CONFIG_LIBDIR. I
set it with the same value of my default PKG_CONFIG_DIR that contains the
paths of all the necessary pkgconfig dirs (I hope that is the right value
to set for PKG_CONFIG_LIBDIR). But still couldn't get past this error.

What does that G_DEFINE_TYPE check do in emacsgtkfixed.c? Is there some
local hack I can do to that .c file so that I can get past this error?

Thanks.

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Re: Error when building from master branch

[Kaushal Modi]

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Finally, I could get past that error!

I noticed that I had this in my PKG_CONFIG_DIR:
"/usr/lib/pkgconfig:/usr/lib64/pkgconfig:.."

While searching for a similar error message online, I came across this
unrelated forum[1] which this comment caught my attention:

> The issue was that I included 32 bit glib2 in the of my *.pro file. I
deleted those and retained only the 64 bit library paths, and it compiled
without the above error.

So I removed "/usr/lib/pkgconfig" from PKG_CONFIG_DIR and that issue was
gone, just like that.

Though, I need to make a note of that myself, and see if removing
/usr/lib/pkgconfig from PKG_CONFIG_DIR breaks builds of anything else.

[1]:
https://www.linuxquestions.org/questions/slackware-14/status_notifier_get_type-error-size-of-array-4175539700/

>

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