linux/gcc, apostrophs display problem

linux/gcc, apostrophs display problem

[towi]

Hi,

when gcc prints warnings or errors it puts identifiers in two strange
single-quotes.

When I do "M-x compile" with "gcc textm.c" the apostrophs are printed
fine.

But, when I have a more complex project with automake and libtool and
everything, when I compile "M-x compile" and "make" the apostrophs get
converted somehow so that emacs displays them as octal codes.
For example:

../../../../trunk/src/mediator/Utils/PortingDBMap.cpp:18: warning:
\342\200\230utils::PortingDBMap::entries\342\200\231 should be
initialized in the member initialization list

I realize that the above codes are UTF-8 apostrophs, and when I copy-
pasted them here they even appeared as apostrophs. Therefor, I gather,
the output is still ok in some sense.

But why is it displayed fine this way and quoted the other way? Do I
have to switch the encoding on the "*compilation*" buffer? And how
would I do that? Or can I pass the output through a filter, just
replacing the nasty UTF-8 chars with a simple '-tick? Can I configure
emacs to do this?

Thanks in advance.

tschau, towi.

PS: I am quite versed in Linux and programming in general, but not as
secure in emacs-lisp -- more a copy-and-paste guy in that area... ;-)

Re: linux/gcc, apostrophs display problem

[Vagn Johansen]

towi <towitowi@gmail.com> writes:

> Hi,
>
> when gcc prints warnings or errors it puts identifiers in two strange
> single-quotes.
>
> When I do "M-x compile" with "gcc textm.c" the apostrophs are printed
> fine.
>
> But, when I have a more complex project with automake and libtool and
> everything, when I compile "M-x compile" and "make" the apostrophs get
> converted somehow so that emacs displays them as octal codes.
> For example:
>
> ../../../../trunk/src/mediator/Utils/PortingDBMap.cpp:18: warning:
> \342\200\230utils::PortingDBMap::entries\342\200\231 should be
> initialized in the member initialization list
>
> I realize that the above codes are UTF-8 apostrophs, and when I copy-
> pasted them here they even appeared as apostrophs. Therefor, I gather,
> the output is still ok in some sense.
>
> But why is it displayed fine this way and quoted the other way? 

fine? you mean differently?

It is probably because of different settings of an environment
variable.

I am able to get different quotes by modifying the LANG variable.

Read more about it here

http://www.mcs.vuw.ac.nz/cgi-bin/info2www?(gcc)Environment+Variables


>> Do I
> have to switch the encoding on the "*compilation*" buffer? And how
> would I do that? Or can I pass the output through a filter, just
> replacing the nasty UTF-8 chars with a simple '-tick? Can I configure
> emacs to do this?

I use the code below to replace the UTF-8 chars with ` and '


(unless standard-display-table          ; Default value is nil!
  (setq standard-display-table (make-display-table)))

(aset standard-display-table #x53978 [96])
(aset standard-display-table #x53979 [39])


-- 
Vagn Johansen

Re: linux/gcc, apostrophs display problem

[towi]

Hi,

"""
(unless standard-display-table          ; Default value is nil!
   (setq standard-display-table (make-display-table)))
 (aset standard-display-table #x53978 [96])
 (aset standard-display-table #x53979 [39])
"""
into .emacs and.... it works! Hey, great! Unbeliable. Do I understand
this...?
Sort of...
  #x53978
is the emacs-internal represenation of that apostroph? What _is_
emacs' internal representation of characters? Can I use this also to
replace all tabs with '*' or all spaces with '_'? lets try...
"""
(aset standard-display-table ?U [?X] )
"""
Cool, making an "X" from a "U" :-). Ok, understuud. Thanks, that was
exacltly what I wanted to know.

I do not recognize the "?..." and "[?...]" form of the arguments here,
they came from the documentation of "standard-display-table". Can I
trouble you to give me an additional hint here?

thanks,
tschau, towi.





On Feb 28, 9:53 am, Vagn Johansen <gonz...@hotmail.com> wrote:
> towi <towit...@gmail.com> writes:
> > Hi,
>
> > when gcc prints warnings or errors it puts identifiers in two strange
> > single-quotes.
>
> > When I do "M-x compile" with "gcc textm.c" theapostrophsare printed
> > fine.
>
> > But, when I have a more complex project with automake and libtool and
> > everything, when I compile "M-x compile" and "make" theapostrophsget
> > converted somehow so that emacs displays them as octalcodes.
> > For example:
>
> > ../../../../trunk/src/mediator/Utils/PortingDBMap.cpp:18: warning:
> > \342\200\230utils::PortingDBMap::entries\342\200\231 should be
> > initialized in the member initialization list
>
> > I realize that theabovecodesareUTF-8apostrophs, and when I copy-
> > pasted them here they even appeared asapostrophs. Therefor, I gather,
> > the output is still ok in some sense.
>
> > But why is it displayed fine this way and quoted the other way?
>
> fine? you mean differently?
>
> It is probably because of different settings of an environment
> variable.
>
> I am able to get different quotes by modifying the LANG variable.
>
> Read more about it here
>
> http://www.mcs.vuw.ac.nz/cgi-bin/info2www?(gcc)Environment+Variables
>
> >> Do I
> > have to switch the encoding on the "*compilation*" buffer? And how
> > would I do that? Or can I pass the output through a filter, just
> > replacing the nastyUTF-8chars with a simple '-tick? Can I configure
> > emacs to do this?
>
> I use the code below to replace theUTF-8chars with ` and '
>
> (unless standard-display-table          ; Default value is nil!
>   (setq standard-display-table (make-display-table)))
>
> (aset standard-display-table #x53978 [96])
> (aset standard-display-table #x53979 [39])
>
> --
> Vagn Johansen

Re: linux/gcc, apostrophs display problem

[towi]

Hello^2,

> """
> (unless standard-display-table          ; Default value is nil!
>    (setq standard-display-table (make-display-table)))
>  (aset standard-display-table #x53978 [96])
>  (aset standard-display-table #x53979 [39])
> """
> into .emacs and.... it works! Hey, great! Unbeliable. Do I understand

ups, I was wrong. I forgot that I got this only in with automake
Makefile "make" emacs-compiles, not when I directly call "gcc" in the
emacs-compile.

But: a) you display-table-tip is also ver useful
and b) your other tip works. now really.

  M-x compile
  LC_ALL=ascii make all
now does _not_ display this nasty UTF-8 apostrophs.

and if I want them back, I can get them with
  M-x compile
  LANG=en_GB.UTF-8 make all
superb.

thanks again.

tt.