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Re: [testcase] Simplified testcases why current gcc trunk cannot compile glibc
- To: Richard Henderson <rth at redhat dot com>
- Subject: Re: [testcase] Simplified testcases why current gcc trunk cannot compile glibc
- From: Roland McGrath <roland at gnu dot org>
- Date: Mon, 15 Oct 2001 16:06:22 -0400 (EDT)
- Cc: Jakub Jelinek <jakub at redhat dot com>, gcc-patches at gcc dot gnu dot org,aoliva at redhat dot com, libc-alpha at sources dot redhat dot com
> We definitely want some mechanism by which we force static
> functions to be emitted -- referencing C from assembly like
> this is not uncommon.
>
> I guess __attribute__((unused)) seems as good a way as any.
It is existing practice to use `__attribute__((unused))' on functions
defined in header files to suppress the warnings, with the expectation that
they will be optimized out rather than become dead code. I don't know that
this practice is entirely wise (that's what `extern inline' is for), but it
has been done and is consistent with what the GCC manual says about
`unused' (i.e., the manual mentions suppressing the warning, implying that
is the primary reason for using it and it might have reasonably been
inferred that it doesn't have other effects that might be detrimental to
optimization). So I don't think it would be ideal to change that behavior.