D-10 for GCC: was fcloseall() depricated

[mike acker]

Code: Select all

~/Documents/1 Workareas/Workarea36$ gcc big_file_writer.c -o big_file_writer
big_file_writer.c: In function ‘main’:
big_file_writer.c:34:3: warning: implicit declaration of function ‘fcloseall’; did you mean ‘fclose’? [-Wimplicit-function-declaration]
   fcloseall();
   ^~~~~~~~~
   fclose

why is fcloseall()) rejected?

[ruwolf]

It is not rejected, you have not declared it.
It is GNU C Library extension.
You probably should turn-on these extensions.

[mike acker]

interesting

Code: Select all

#define _GNU_SOURCE /* include in order to use fcloseall() */

it would seem this was changed in D-10; I had not needed that declaration earlier

[stevepusser]

Changed in the update to gcc-8 in Debian 10 would be a better way to say it. The same would also apply to any distro that updates to gcc-8, too.