gcc errors in compiler output

gcc errors in compiler output

[Julianne]

When using emacs 23.1 on Fedora 12, compiling a simple c file with an 
error yields the following output:


gcc -o my_test my_test.c
my_test.c: In function ‘main’:
my_test.c:58: error: expected ‘;’ before ‘x’

If I run the compiler in an ordinary xterm (or Konsole), the output 
appears to be some colorization of the identifiers in the context of the 
error.

The hex dump shows the missing charaters:

6d 79 5f 74 65 73 74 2e  63 3a 20 49 6e 20 66 75  |my_test.c: In fu|
6e 63 74 69 6f 6e 20 e2  80 98 6d 61 69 6e e2 80  |nction ...main..|
99 3a 0a 6d 79 5f 74 65  73 74 2e 63 3a 35 38 3a  |.:.my_test.c:58:|
20 65 72 72 6f 72 3a 20  65 78 70 65 63 74 65 64  | error: expected|
20 e2 80 98 3b e2 80 99  20 62 65 66 6f 72 65 20  | ...;... before |
e2 80 98 78 e2 80 99 0a                           |...x....|

What is the solution to either a) get gcc to not output terminal color 
settings around identifiers or b) make emacs ignore the extraneous stuff 
around the identifiers?

Julianne

Re: gcc errors in compiler output

[Pascal J. Bourguignon]

Julianne <juliannerc@gmail.com> writes:

> When using emacs 23.1 on Fedora 12, compiling a simple c file with an
> error yields the following output:
>
>
> gcc -o my_test my_test.c
> my_test.c: In function ‘main’:
> my_test.c:58: error: expected ‘;’ before ‘x’
>
> If I run the compiler in an ordinary xterm (or Konsole), the output
> appears to be some colorization of the identifiers in the context of
> the error.

That's where your error lies.  It is not a colorization, but an
encoding in utf-8 of the characters ‘ and ’:

my_test.c: In function ‘main’:
my_test.c:58: error: expected ‘;’ before ‘x’


> The hex dump shows the missing charaters:
>
> 6d 79 5f 74 65 73 74 2e  63 3a 20 49 6e 20 66 75  |my_test.c: In fu|
> 6e 63 74 69 6f 6e 20 e2  80 98 6d 61 69 6e e2 80  |nction ...main..|
> 99 3a 0a 6d 79 5f 74 65  73 74 2e 63 3a 35 38 3a  |.:.my_test.c:58:|
> 20 65 72 72 6f 72 3a 20  65 78 70 65 63 74 65 64  | error: expected|
> 20 e2 80 98 3b e2 80 99  20 62 65 66 6f 72 65 20  | ...;... before |
> e2 80 98 78 e2 80 99 0a                           |...x....|

I see no missing character here.


> What is the solution to either a) get gcc to not output terminal color
> settings around identifiers or b) make emacs ignore the extraneous
> stuff around the identifiers?

Configure the same encoding in your terminal and in your shell!


If your terminal handles UTF-8:

[pjb@hubble :0.0 tmp]$ export LC_CTYPE=en_US.UTF-8
[pjb@hubble :0.0 tmp]$ cc  -c -o a.o a.c
a.c: In function ‘main’:
a.c:3: error: expected ‘;’ before ‘x’


If your terminal handles ISO-8859-1:

[pjb@hubble :0.0 tmp]$ export LC_CTYPE=en_US.ISO-8859-1
[pjb@hubble :0.0 tmp]$ cc  -c -o a.o a.c
a.c: In function 'main':
a.c:3: error: expected ';' before 'x'

etc...




-- 
__Pascal Bourguignon__                     http://www.informatimago.com/

Re: gcc errors in compiler output

[tomas]

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On Sun, Dec 27, 2009 at 02:01:22AM +0100, Pascal J. Bourguignon wrote:
> Julianne <juliannerc@gmail.com> writes:
> 
> > When using emacs 23.1 on Fedora 12, compiling a simple c file with an
> > error yields the following output:

[...]

> That's where your error lies.  It is not a colorization, but an
> encoding in utf-8 of the characters ‘ and ’:

[...]

> [pjb@hubble :0.0 tmp]$ export LC_CTYPE=en_US.ISO-8859-1
> [pjb@hubble :0.0 tmp]$ cc  -c -o a.o a.c
> a.c: In function 'main':
> a.c:3: error: expected ';' before 'x'

Exactly. Since ggcc 4.0 [1], the output of GCC is uTF-8, if the locale
allows. So your best bet is to do what Pascal suggests or even more
radically call "LC_ALL = C gcc" instead of just "gcc" to turn off this
"feature". You might tweak the environment your compile subprocess sees
with setenv in Emacs.

[1] See <http://gcc.gnu.org/gcc-4.0/changes.html> under "Caveats", and
search for the phrase "English-language diagnostic messages".

Regards
- -- tomás
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Re: gcc errors in compiler output

[Vagn Johansen]

Julianne <juliannerc@gmail.com> writes:

> When using emacs 23.1 on Fedora 12, compiling a simple c file with an
> error yields the following output:
>
>
> gcc -o my_test my_test.c
> my_test.c: In function ‘main’:
> my_test.c:58: error: expected ‘;’ before ‘x’
>

[...]


See also

http://groups.google.co.zm/group/gnu.emacs.help/browse_thread/thread/5b78cc295848008f
"linux/gcc, apostrophs display problem"
-- 
Vagn Johansen