Unused parameter in binary-io.h?

[Reuben Thomas]

I get the following warnings when compiling with that header on a GNU system:

../lib/binary-io.h: In function ‘__gl_setmode_check’:
../lib/binary-io.h:62:25: warning: unused parameter ‘fd’ [-Wunused-parameter]
 __gl_setmode_check (int fd) { return 0; }

Is there some reason that the unused parameter is not suitably
decorated for gcc?

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