Re: [Bug-gnulib] sysexits.h

[Paul Eggert]

Simon Josefsson <address@hidden> writes:

> made me recall a system that couldn't handle empty .o files.  All *.c
> files must declare at least one symbol, or the resulting *.o file was
> regarded as corrupt when you tried to link it.  I saw this only a few
> months ago, and I don't normally use historic machines (although
> sometimes non-mainstream ones) so it may be relevant.

It is certainly relevant from the point of the C and POSIX standards.
They both require that every C translation unit must contain at least
one external declaration.  "gcc -pedantic" checks for this.