Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r260014, r260099:

gcc: Add support for label attributes and "unavailable" attribute.

Apple GCC has extensions to support for both label attributes and
an "unavailable" attribute. These are critical for objc but are
also useful in regular C/C++.

Obtained from: Apple GCC 4.2 - 5531

MFC r258017, r258429, r258748, r258817:

Merge updates from FSF pre4.3 GCC inspired on Apple's gcc:

Updates to libiberty and mangling.
New align attribute.
Merge Apple updates to libstdc++.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

FreeBSD uses unchanged versions of this files.

Use stock GCC versions on these files.

FreeBSD uses stock versions of these GCC files.

Use pure stock files.

Use the stock (3.1) version.

Use the stock [3.1-snap] file.

Use the stock file now.

Fix conflicts.

Fixed printf format errors. gcc should have a macro HOST_PTR_PRINTF_TYPE
to go with its HOST_PTR_PRINTF[_FORMAT], since if %p is wrong for the
format then `void *' is probably wrong for the type.

This commit was generated by cvs2svn to compensate for changes in r18334,
which included commits to RCS files with non-trunk default branches.

Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the
non-i386, non-unix, and generatable files have been trimmed, but can easily
be added in later if needed.

gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's
handy to have both available for reference for such little cost.

The freebsd-specific changes will then be committed, and once the dust has
settled, the bmakefiles will be committed to use this code.