Hi Paul, Hi L4Re Hackers,
while examining this discussion and also while doing a bit of porting
work I revisited that decision we discussed here.
The choice to go with __BEGIN_DECLS was not ideal, since the __ in the
beginning already indicates that this is a name internal to the libc and
/ or the compiler and cdefs.h is not a POSIX standard header.
So to rectify this we have introduced an additional define specific to
L4Re [0] which uses L4_BEGIN_DECLS and L4_END_DECLS. The L4 naming
should avoid further name clashes which was the cause of the initial
change and this should be available irrespective of C library or
compiler support. We still also define __BEGIN_DECLS and __END_DECLS to
be backwards compatible for now.
I just thought I'd bring this up here, since we just recently had this
discussion and you might have to adapt code. So maybe it is a good idea
to go with the new symbol right away :)
Best regards,
- Marcus
[0]
https://github.com/kernkonzept/l4re-core/commit/9908610b97c86ef6fae55db44d525e9ec79138c5
On 2025-05-19 22:35, Adam Lackorzynski wrote:
Hi Paul,
On Sat May 17, 2025 at 23:56:56 +0200, Paul Boddie wrote:
Hello,
Taking the opportunity to use a newer snapshot of L4Re, I notice that
EXTERN_C_BEGIN and EXTERN_C_END now cause errors like this:
error: unknown type name
‘DO_NOT_USE_EXTERN_C_END_ANY_MORE__USE__END_DECLS’
The commit introducing this behaviour seems to be this one:
https://github.com/kernkonzept/l4re-core/commit/
e04b50e0e4f7c7a3316a2d8b658db6d81bd3e88d
It would appear that throughout L4Re, a mass renaming has occurred
from these
symbols to __BEGIN_DECLS and __END_DECLS. Was there a particular
reason for
EXTERN_C_BEGIN/EXTERN_C_END were self-made defines and we changed that
to the more commonly used __BEGIN_DECLS/__END_DECLS (as seen in
cdefs.h).
Adam
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