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MDEV-12933 sort out the compression library chaos

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bzip2/lz4/lzma/lzo/snappy compression is now provided via *services*

they're almost like normal services, but in include/providers/
and they're supposed to provide exactly the same interface
as original compression libraries (but not everything,
only enough of if for the code to compile).

the services are implemented via dummy functions that return
corresponding error values (LZMA_PROG_ERROR, LZO_E_INTERNAL_ERROR, etc).

the actual compression libraries are linked into corresponding
provider plugins. Providers are daemon plugins that when loaded
replace service pointers to point to actual compression functions.

That is, run-time dependency on compression libraries is now on plugins,
and the server doesn't need any compression libraries to run, but
will automatically support the compression when a plugin is loaded.

InnoDB and Mroonga use compression plugins now. RocksDB doesn't,
because it comes with standalone utility binaries that cannot
load plugins.
This commit is contained in:
Kartik Soneji 2021-08-31 14:09:47 +02:00 • committed by Sergei Golubchik
commit bf8b699f64
94 changed files with 1954 additions and 451 deletions
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16
storage/mroonga/CMakeLists.txt
View file

@ -110,19 +110,9 @@ if(MRN_GROONGA_BUNDLED)
set(GROONGA_NORMALIZER_MYSQL_EMBED ON)
endif()
file(READ "${MRN_BUNDLED_GROONGA_DIR}/bundled_lz4_version"
MRN_BUNDLED_LZ4_VERSION)
string(STRIP
"${MRN_BUNDLED_LZ4_VERSION}"
MRN_BUNDLED_LZ4_VERSION)
set(MRN_BUNDLED_LZ4_DIR
"${MRN_BUNDLED_GROONGA_DIR}/vendor/lz4-${MRN_BUNDLED_LZ4_VERSION}")
if(EXISTS ${MRN_BUNDLED_LZ4_DIR})
set(GRN_WITH_BUNDLED_LZ4 ON)
set(GRN_WITH_LZ4 "yes")
else()
set(GRN_WITH_LZ4 "no")
endif()
set(GRN_WITH_LZ4 "yes")
set(LIBLZ4_FOUND TRUE)
set(LZ4_LIBS "" CACHE STRING "" FORCE)
add_subdirectory("${MRN_BUNDLED_GROONGA_RELATIVE_DIR}")
else()