parse error before `{', stray '\' in program

parse error before `{', stray '\' in program

[Graf Alex]

Hello,

If I have some defines which have '\' inside ...

#define BIND_DESC_ALM \
{ \
	CAlmSourceProp::IdxBindingGrp; \
}

my cross compiler produce following output:

ppc_8xx-gcc -fPIC -DPIC -D_DEBUG -Wall -ansi -g3 -O0
-I/home/projects/Nscu/_Inc -I/home/projects/Nscu/_Inc_PC -c -o main.o
main.cpp
main.cpp:15: parse error before `{'
main.cpp:15: stray '\' in program
main.cpp:16: stray '\' in program

I have have SuSE 8.1 and the cross compiler (ppc_8xx-gcc) has version
2.95.4.

The troubles are coming from the dos <cr><lf> at line end. With gcc 3.2
(from host) I don't have this problems.
I don't want to remove the <cr>s (dos2unix), because these files have to be
used on Windows too.

Any suggestions? Unfortunately there is no ppc_8xx-gcc with version 3.2 out.
Or is it?

Alex


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Re: parse error before `{', stray '\' in program

[Wolfgang Denk]

In message <791B3205DB661A42B4BFE5464A7D1D02010E44F3@chzugexch02.zug.ch.abatos.com> you wrote:
>
> If I have some defines which have '\' inside ...
>
> #define BIND_DESC_ALM \
> { \
> 	CAlmSourceProp::IdxBindingGrp; \
> }
>
> my cross compiler produce following output:
>
> ppc_8xx-gcc -fPIC -DPIC -D_DEBUG -Wall -ansi -g3 -O0
> -I/home/projects/Nscu/_Inc -I/home/projects/Nscu/_Inc_PC -c -o main.o
> main.cpp
> main.cpp:15: parse error before `{'
> main.cpp:15: stray '\' in program
> main.cpp:16: stray '\' in program

This is usually caused by illegal file formats.

> The troubles are coming from the dos <cr><lf> at line end. With gcc 3.2
> (from host) I don't have this problems.

Use Unix file formats (plain '\n' line termination).



Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Brain off-line, please wait.

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Re: parse error before `{', stray '\' in program

[Eugene Surovegin]

At 02:23 AM 4/10/2003, you wrote:

>The troubles are coming from the dos <cr><lf> at line end. With gcc 3.2
>(from host) I don't have this problems.
>I don't want to remove the <cr>s (dos2unix), because these files have to be
>used on Windows too.

There is an old patch (dated 1999) for preprocessor which solves this problem.
Search the net or use the distribution which has this patch applied e.g. MVL.

Eugene


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Re: parse error before `{', stray '\' in program

[Wolfgang Denk]

In message <3E96684D.7000601@imc-berlin.de> you wrote:
>
> Good you please post the URL to the list if you find one!
> I am facing this problem from time to time ...
>
> Does anyone know if the ppc_8xx-gcc 2.95.4 from DENX ELDK has this
> patch applied?

No, it has not, and will not.

I see no sense in a modification that supports violations  of  the  C
standard.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Work 8 hours, sleep 8 hours; but not the same 8 hours.

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Re: parse error before `{', stray '\' in program

[Ron Flory]

Wolfgang Denk wrote:
> In message <3E96684D.7000601@imc-berlin.de> you wrote:
>
>>Good you please post the URL to the list if you find one!
>>I am facing this problem from time to time ...
>>
>>Does anyone know if the ppc_8xx-gcc 2.95.4 from DENX ELDK has this
>>patch applied?
>
>
> No, it has not, and will not.
>
> I see no sense in a modification that supports violations  of  the  C
> standard.

  especially when its so easy to cleanup text files by piping them
through 'tr':

    cat "$src_file" | tr -d \\015 > "$tmp_file"
    mv -f $tmp_file $src_file

  which removes those funky MsDos carriage returns.

(depending on your shell, you may be able to skip the tmp_file above)

  Just write a small shell-script that iterates through your source
files, applying this filter.


  Like you, I also develop on several platforms.  I find it convenient
to add a new 'fix' target to the makefiles, then run the above filter
on all source and header files in the project.

   <import file from MsDos/windoze>
   make fix           # with implied 'make clean'
   make

  works great, on lots and lots of projects...

ron


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Re: parse error before `{', stray '\' in program

[Eugene Surovegin]

At 10:37 AM 4/11/2003, Ron Flory wrote:

>Wolfgang Denk wrote:
>>In message <3E96684D.7000601@imc-berlin.de> you wrote:
>>
>>>Does anyone know if the ppc_8xx-gcc 2.95.4 from DENX ELDK has this
>>>patch applied?
>>
>>
>>No, it has not, and will not.
>>
>>I see no sense in a modification that supports violations  of  the  C
>>standard.


Well, it doesn't violate any existing C/C++ standard:

This is excerpt from ISO/IEC 9899 (p. 9):

   5.1.1.2 Translation phases

     1 The precedence among the syntax rules of translation is specified
       by the following phases

         1. Physical source file multibyte characters are mapped,
            in an implementation-defined manner, to the source character set
            (introducing new-line characters for end-of-line indicators)
             if necessary.
             ....

         2. Each instance of a backslash character (\) immediately
            followed by a new-line character is deleted, splicing physical
            source lines to form logical source lines.
            ....

So, it's clearly implementation-defined behavior. In this sense both
preprocessor implementations (with or without patch) are standard compliant.

I think this trivial patch make more cleaner solution than any ugly makefile
hacks like dos2unix or tr or whatever... And definitely more user/developer
friendly.

Eugene


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Re: parse error before `{', stray '\' in program

[Wolfgang Denk]

In message <5.1.0.14.2.20030411115316.0416be20@mail.zultys.com> you wrote:
>
>          1. Physical source file multibyte characters are mapped,
>             in an implementation-defined manner, to the source character set
>             (introducing new-line characters for end-of-line indicators)
>              if necessary.
>              ....

"\r\n" is not a  multibyte  character  but  a  sequence  of  the  two
characters C and NL.


>          2. Each instance of a backslash character (\) immediately
>             followed by a new-line character is deleted, splicing physical
>             source lines to form logical source lines.
>             ....

This sentence contains the word "immediat" which does not  allow  for
an  additional  CR  character between the backslash character and the
new-line character.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
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