[SCM] MIG branch, master, updated. v1.8-32-g403007d

[Samuel Thibault]

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commit 403007dc55222d4ca1120dd7730baa7579d12d88
Author: Sergey Bugaev <bugaevc@gmail.com>
Date:   Sun Feb 12 14:10:38 2023 +0300

    Drop -undef -ansi from cpp flags
    
    Since GNU Mach commit d30481122a5d24ad6b921062f93b9172ef922fc3,
    i386/machine_types.defs defines types based on defined(__x86_64__).
    Supressing the built-in macro definitions will now result in the wrong
    type being silently selected.
    
    -undef was initially introduced in commit
    78b6a7665db7b2eae367e17102821cbdca231d19 without much of an explanation.
    -ansi was introduced in commit 6940fb91859e46b2e96a331a029f2dc2a0ee51c9
    "to avoid -Di386=1 and the like".
    
    Since glibc has been using MIG with CPP set to a custom GCC invocation
    which did *not* use either flag, it appears that everything works well
    enough even without them. On the other hand, not having __x86_64__
    defined most definetely causes issues for anything that does not set a
    custom CPP when invoking MIG (i.e., most users). Other built-in
    definitions could be used in the future in a similar way (e.g. on other
    architectures); it's really more of a coincidence that they have not
    been used until now, and things kept working with -undef.
    Message-Id: <20230212111044.610942-8-bugaevc@gmail.com>

-----------------------------------------------------------------------

Summary of changes:
 mig.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


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