grub_script.yy.c #define fprintf(...) 0 no effect

[Carl Karsten]

grub-2.02.tar.gz

Debian 9.8 (stretch):

builds, no errors.

Ubuntu 18.04.2 LTS:

grub_script.yy.c: In function ‘yy_fatal_error’:
grub_script.yy.c:19:22: error: statement with no effect [-Werror=unused-value]
 #define fprintf(...) 0
                      ^
grub_script.yy.c:2367:2: note: in expansion of macro ‘fprintf’
  fprintf( stderr, "%s\n", msg );
  ^~~~~~~

here are some interesting diffs:

ubuntu:

#define YY_FLEX_SUBMINOR_VERSION 4

debian:

#define YY_FLEX_SUBMINOR_VERSION 1

grep fprintf grub_script.yy.c

ubuntu:

#define fprintf(...) 0
    fprintf( stderr, "%s\n", msg );
address@hidden:~/temp/grub-2.02$

debian:

#define fprintf(...) 0
    (void) fprintf( stderr, "%s\n", msg );

--

Carl K