initial merge of GCC 12.3.0.

this doesn't include any of the changes to the .c -> .cc files renamed,
and reverts our local changes to the vax port and libsanitizer subdir.
vax GCC was rewritten and our local fixes no longer are relevant, and
the new libsanitizer is more updated than our old one, and merging via
gcc10->gcc12 is not really possible.

unfortunately, our local changes to libsanitizer that aren't related
to the general update of those sources (ie, the netbsd code) will need
to be re-checked and perhaps re-ported.

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

merge GCC 9.3.0.

merge GCC 8.3.0 pass 1. will not compile yet. thare are still
about 25 files with merge issues.

branches: 1.3.2;
make structure that demands alignment be that alignment.

branches: 1.2.2;
first pass at merging GCC 7.4.0. unlikely to compile..

branches: 1.1.1;
Initial revision

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

merge GCC 9.3.0.

merge GCC 8.3.0 pass 1. will not compile yet. thare are still
about 25 files with merge issues.

branches: 1.3.2;
make structure that demands alignment be that alignment.

branches: 1.2.2;
first pass at merging GCC 7.4.0. unlikely to compile..

branches: 1.1.1;
Initial revision

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

merge GCC 9.3.0.

merge GCC 8.3.0 pass 1. will not compile yet. thare are still
about 25 files with merge issues.

branches: 1.3.2;
make structure that demands alignment be that alignment.

branches: 1.2.2;
first pass at merging GCC 7.4.0. unlikely to compile..

branches: 1.1.1;
Initial revision

merge GCC 9.3.0.

merge GCC 8.3.0 pass 1. will not compile yet. thare are still
about 25 files with merge issues.

branches: 1.3.2;
make structure that demands alignment be that alignment.

branches: 1.2.2;
first pass at merging GCC 7.4.0. unlikely to compile..

branches: 1.1.1;
Initial revision

merge GCC 8.3.0 pass 1. will not compile yet. thare are still
about 25 files with merge issues.

branches: 1.3.2;
make structure that demands alignment be that alignment.

branches: 1.2.2;
first pass at merging GCC 7.4.0. unlikely to compile..

branches: 1.1.1;
Initial revision

make structure that demands alignment be that alignment.

branches: 1.2.2;
first pass at merging GCC 7.4.0. unlikely to compile..

branches: 1.1.1;
Initial revision