Move OPTNONE macro to eficompiler.h

This is also useful in downstream projects so add it
to public header

Signed-off-by: Callum Farmer <gmbr3@opensuse.org>

Tail calls break ctors/dtors

Add macro EFI_NO_TAIL_CALL which disables tail call
optimization on a per-function basis

Signed-off-by: Callum Farmer <gmbr3@opensuse.org>

Commit 3dd05c and subsequent ones introduced the use of the GNU
specific __attribute__((__unused__)), which breaks MSVC compilation...

I'll use this as a reminder that gnu-efi is compiled with more

Commit 3dd05c and subsequent ones introduced the use of the GNU
specific __attribute__((__unused__)), which breaks MSVC compilation...

I'll use this as a reminder that gnu-efi is compiled with more than
GNU toolchains, and that contributors might want to be careful about
adding GNU-specific extensions...

This patch does the following:
Create a new eficompiler.h header that sets all compiler-specific
options and extensions
Create a new EFI_UNUSED macro to be used in lieu of
__attribute__((__unused__)) and applies it to the relevant sources
Move the ALIGN(x) macro, previously defined in efisetjmp.h to the new header

Oh, and it also fixes a bunch of trailing whitespaces (because my code
editor is set to do just that by default).

Signed-off-by: Pete Batard <pbatard@users.sf.net>
Signed-off-by: Nigel Croxon <nigel.croxon@hpe.com>

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