fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Nikhil Benesch 11c5d4741a cross-platform compatibility improvements ... Summary: We've had a couple CockroachDB users fail to build RocksDB on exotic platforms, so I figured I'd try my hand at solving these issues upstream. The problems stem from a) `USE_SSE=1` being too aggressive about turning on SSE4.2, even on toolchains that don't support SSE4.2 and b) RocksDB attempting to detect support for thread-local storage based on OS, even though it can vary by compiler on the same OS. See the individual commit messages for details. Regarding SSE support, this PR should change virtually nothing for non-CMake based builds. `make`, `PORTABLE=1 make`, `USE_SSE=1 make`, and `PORTABLE=1 USE_SSE=1 make` function exactly as before, except that SSE support will be automatically disabled when a simple SSE4.2-using test program fails to compile, as it does on OpenBSD. (OpenBSD's ports GCC supports SSE4.2, but its binutils do not, so `__SSE_4_2__` is defined but an SSE4.2-using program will fail to assemble.) A warning is emitted in this case. The CMake build is modified to support the same set of options, except that `USE_SSE` is spelled `FORCE_SSE42` because `USE_SSE` is rather useless now that we can automatically detect SSE support, and I figure changing options in the CMake build is less disruptive than changing the non-CMake build. I've tested these changes on all the platforms I can get my hands on (macOS, Windows MSVC, Windows MinGW, and OpenBSD) and it all works splendidly. Let me know if there's anything you object to—I obviously don't mean to break any of your build pipelines in the process of fixing ours downstream. Closes https://github.com/facebook/rocksdb/pull/2199 Differential Revision: D5054042 Pulled By: yiwu-arbug fbshipit-source-id: 938e1fc665c049c02ae15698e1409155b8e72171		8 years ago
..
utilities	Add GetAllKeyVersions API	8 years ago
advanced_options.h	Allow IntraL0 compaction in FIFO Compaction	8 years ago
c.h	Add C API to set max_file_opening_threads option	8 years ago
cache.h	Object lifetime in cache	8 years ago
cleanable.h	Pinnableslice (2nd attempt)	8 years ago
compaction_filter.h	Abort compactions more reliably when closing DB	8 years ago
compaction_job_stats.h	Single Delete Mismatch and Fallthrough statistics	8 years ago
comparator.h	Updated all copyright headers to the new format.	9 years ago
convenience.h	Add GetSupportedCompressions() convenience function	8 years ago
db.h	Add bulk create/drop column family API	8 years ago
db_bench_tool.h	Separeate main from bench functionality to allow cusomizations	9 years ago
db_dump_tool.h	Add GPLv2 as an alternative license.	8 years ago
env.h	Blob storage pr	8 years ago
experimental.h	Updated all copyright headers to the new format.	9 years ago
filter_policy.h	Updated all copyright headers to the new format.	9 years ago
flush_block_policy.h	Configure index partition size	8 years ago
iostats_context.h	cross-platform compatibility improvements	8 years ago
iterator.h	Pinnableslice (2nd attempt)	8 years ago
ldb_tool.h	Allow Users to change customized ldb tools' header in help printing	8 years ago
listener.h	Allow IntraL0 compaction in FIFO Compaction	8 years ago
memtablerep.h	Unified InlineSkipList::Insert algorithm with hinting	8 years ago
merge_operator.h	[rocksdb][PR] Remove option min_partial_merge_operands and verify_checksums_in_comp…	8 years ago
metadata.h	Updated all copyright headers to the new format.	9 years ago
options.h	fix WritableFile buffer size in direct IO	8 years ago
perf_context.h	cross-platform compatibility improvements	8 years ago
perf_level.h	Move away from enum char value -1	9 years ago
persistent_cache.h	Dump persistent cache options	8 years ago
rate_limiter.h	Add GPLv2 as an alternative license.	8 years ago
slice.h	Pinnableslice (2nd attempt)	8 years ago
slice_transform.h	Improve documentation of SliceTransform.	8 years ago
snapshot.h	Add GPLv2 as an alternative license.	8 years ago
sst_dump_tool.h	Updated all copyright headers to the new format.	9 years ago
sst_file_manager.h	Add GPLv2 as an alternative license.	8 years ago
sst_file_writer.h	Add GPLv2 as an alternative license.	8 years ago
statistics.h	Add user stats Reset API	8 years ago
status.h	Limit maximum memory used in the WriteBatch representation	8 years ago
table.h	Configure index partition size	8 years ago
table_properties.h	Support SST files with Global sequence numbers [reland]	8 years ago
thread_status.h	cross-platform compatibility improvements	8 years ago
threadpool.h	Add GPLv2 as an alternative license.	8 years ago
transaction_log.h	Updated all copyright headers to the new format.	9 years ago
types.h	Updated all copyright headers to the new format.	9 years ago
universal_compaction.h	Updated all copyright headers to the new format.	9 years ago
version.h	RocksDB Release 5.4 : Update HISTORY.md and build version.	8 years ago
wal_filter.h	Avoid overloaded virtual function	9 years ago
write_batch.h	support PopSavePoint for WriteBatch	8 years ago
write_batch_base.h	support PopSavePoint for WriteBatch	8 years ago
write_buffer_manager.h	Add GPLv2 as an alternative license.	8 years ago