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

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. "