MDEV-16525: MyRocks linking fails with: Undefined reference to `ZDICT_trainFromBuffer'

RocksDB will only build with libzstd support if libzstd version is
>=1.1.13. Unfortunately CMake's FindPackage claims it found version
1.1.13 when we have 1.1.12-1 installed, so a workaround with
CheckFunctionExists is used to properly check for correct libzstd
support.

storage/rocksdb/build_rocksdb.cmake

@@ -64,10 +64,20 @@ if(SNAPPY_FOUND  AND (NOT WITH_ROCKSDB_SNAPPY STREQUAL "OFF"))
   list(APPEND THIRDPARTY_LIBS ${SNAPPY_LIBRARIES})
 endif()
 
+include(CheckFunctionExists)
 if(ZSTD_FOUND AND (NOT WITH_ROCKSDB_ZSTD STREQUAL "OFF"))
-  add_definitions(-DZSTD)
-  include_directories(${ZSTD_INCLUDE_DIR})
-  list(APPEND THIRDPARTY_LIBS ${ZSTD_LIBRARY})
+  SET(CMAKE_REQUIRED_LIBRARIES zstd)
+  CHECK_FUNCTION_EXISTS(ZDICT_trainFromBuffer ZSTD_VALID)
+  UNSET(CMAKE_REQUIRED_LIBRARIES)
+  if (WITH_ROCKSDB_ZSTD STREQUAL "ON" AND NOT ZSTD_VALID)
+    MESSAGE(FATAL_ERROR
+      "WITH_ROCKSDB_ZSTD is ON and ZSTD library was found, but the version needs to be >= 1.1.3")
+  endif()
+  if (ZSTD_VALID)
+    add_definitions(-DZSTD)
+    include_directories(${ZSTD_INCLUDE_DIR})
+    list(APPEND THIRDPARTY_LIBS ${ZSTD_LIBRARY})
+  endif()
 endif()
 
 add_definitions(-DZLIB)
@@ -119,7 +129,6 @@ int main() {
   endif()
 endif()
 
-include(CheckFunctionExists)
 CHECK_FUNCTION_EXISTS(malloc_usable_size HAVE_MALLOC_USABLE_SIZE)
 if(HAVE_MALLOC_USABLE_SIZE)
   add_definitions(-DROCKSDB_MALLOC_USABLE_SIZE)