Re: compile-error: stdin is not a constant

[Daniel Jacobowitz <drow@false.org>]

On Wed, Nov 03, 1999 at 01:25:44PM +0100, Wolfgang Haeuptli wrote:
> 
> Hello people
> 
> sorry for the (probably) basic question...
> 
> Since I installed R5, some programs (that used to compile OK on R4) 
> complain about : 
> 
> initializer element for 'foo' is not constant
> 
> while compiling constructs like:
> 
> FILE *foo = stdin;   (or FILE *foo = {(FILE *) stdin};  )

Because it isn't a constant any more.

> 
> when I replaced this line with: FILE *foo = STDIN_FILENO; 
> ( defined in unistd.h), compilation works, but the resulting program
> segfaults...

Which should generate one hell of a warning, since STDIN_FILENO is a
small number, not a struct FILE *.

You need to initialize the variable early in main() or something along
those lines, or you can declare a constructor using __attribute__,
although I do not remember the syntax (search list archives).

Dan

/--------------------------------\  /--------------------------------\
|       Daniel Jacobowitz        |__|        SCS Class of 2002       |
|   Debian GNU/Linux Developer    __    Carnegie Mellon University   |
|         dan@debian.org         |  |       dmj+@andrew.cmu.edu      |
\--------------------------------/  \--------------------------------/

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