dev-cpp-users

[Dev-C++] c++ style comments and porting problems

[<Ger...@ne...>]

Message: 1
Date: Tue, 17 Dec 2002 18:08:11 +0100
From: =?ISO-8859-1?Q?Carlos_Garc=EDa_del_Monte?= <cg...@wo...>
To: dev-cpp-users-list <dev...@li...>
Subject: Re: [Dev-C++] ANSI C project

You used C++ style comments?
mingw generates millions errors if you use them in a C progam; you can 
maintain them if you add the -std=c99 option to the compiler (in mingw 
2.0.0, based on gcc3.2,. If you use previous version, based on gcc 2.95.3-6
 perhaps then you need change the comment style)

/*****so thats the command line option*******************************/
/**************************thanks dude*******************************/

Teresa Raymond wrote:

I opened a project that I had written with Visual C++ 6.0 which had no 
compiler errors in VC6, but in DevC++ there were about 24 compiler 
errors.  The source code is written in C and not C++ but I selected 
the Compiler options to support ANSI C.  Anyone have an idea as to 
what is going on here?

/*id love to help if you can provide sufficient information about your *problem, like source code, windows version, compiler version, compiler *settings, and error/warning messages. 
*
*/


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Re: [Dev-C++] c++ style comments and porting problems

[<cg...@wo...>]

Ger...@ne... wrote:

>Message: 1
>Date: Tue, 17 Dec 2002 18:08:11 +0100
>From: =?ISO-8859-1?Q?Carlos_Garc=EDa_del_Monte?= <cg...@wo...>
>To: dev-cpp-users-list <dev...@li...>
>Subject: Re: [Dev-C++] ANSI C project
>
>You used C++ style comments?
>mingw generates millions errors if you use them in a C progam; you can 
>maintain them if you add the -std=c99 option to the compiler (in mingw 
>2.0.0, based on gcc3.2,. If you use previous version, based on gcc 2.95.3-6
> perhaps then you need change the comment style)
>
>/*****so thats the command line option*******************************/
>/**************************thanks dude*******************************/
>  
>
I'm not sure of understanding this reply, but this is the answer to what 
I've understood:

The option for support ANSI C which Mrs Teresa is talking about, is the 
one you set by clicking "support traditional ANSI C" option in 
compiler's options dialog. That sets the command line option -ansi, 
which is not the same than -std=c99. -ansi stands for -std=c89. The C++ 
style comments are accepted from 1999 ANSI C standard, so any option 
telling the compiler to be within any previous ANSI standard previous to 
c99 (which is the last one) won't accept c++ style comments in a c 
source. The default is std=gnu89, which is the 99 standard plus gnu 
extensions. 99 standard is not fully supported right now, when it be, it 
will be the default.

In gcc-3.2.chm file:
"C++ Style Comments
In GNU C, you may use C++ style comments, which start with // and 
continue until the end of the line. Many other C implementations allow 
such comments, and they are likely to be in a future C standard. 
However, C++ style comments are not recognized if you specify -ansi, a 
-std option specifying a version of ISO C before C99, or -traditional, 
since they are incompatible with traditional constructs like 
dividend//*comment*/divisor. "

Re: [Dev-C++] evident errata correction c++ style comments and porting problems

[<cg...@wo...>]

> [snip]


>   The default is std=gnu89, which is the 99 standard plus gnu 
> extensions. 99 standard is not fully supported right now, when it be, 
> it will be the default. 

[snip]

obviouslu -std=gnu89 is the 89 standard plus gnu extensions