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rewrite fallthrough to HEIM_FALLTHROUGH to deal with new Apple SDKs

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Apple clang version 14.0.0 (clang-1400.0.17.3.1) fails the build
because stds.h defines `fallthrough` as a macro which is then
expanded when base.h evaluates

  # if __has_attribute(fallthrough) && __clang_major__ >= 5

The macOS SDK defines `DISPATCH_FALLTHROUGH` as the macro instead
of `fallthrough`.

This change replaces the use of `fallthrough` in the tree with
`HEIM_FALLTHROUGH` and updates the declaration in configure logic
to define `HEIM_FALLTHROUGH` based upon existing definitions
(if any) of `fallthrough` or `DISPATCH_FALLTHROUGH`.
This commit is contained in:
Daria Phoebe Brashear
2022-09-16 09:57:24 -04:00
committed by Jeffrey Altman
parent f6d26bce66
commit 133f517482
21 changed files with 48 additions and 44 deletions
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2
lib/kafs/rxkad_kdf.c
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@@ -209,7 +209,7 @@ _kafs_derive_des_key(krb5_enctype enctype, void *keydata, size_t keylen,
ret = compress_parity_bits(keydata, &keylen);
if (ret)
return ret;
fallthrough;
HEIM_FALLTHROUGH;
default:
if (enctype < 0)
return KRB5_PROG_ETYPE_NOSUPP;