Build fails without Snappy

[IanEmmons]

According to your documentation, RocksDB should build without the dependency Snappy. However, attempting to do so results in this compiler error:

% make static_lib
$DEBUG_LEVEL is 0, $LIB_MODE is static
$DEBUG_LEVEL is 0, $LIB_MODE is static
  CC       cache/cache.o
...
  CC       util/compression.o
util/compression.cc:1395:40: error: unused parameter 'args' [-Werror,-Wunused-parameter]
 1395 |   Status ExtractUncompressedSize(Args& args) override {
      |                                        ^
1 error generated.
make: *** [util/compression.o] Error 1

This is easily fixed by changing line 1395 of compression.cc from this:

  Status ExtractUncompressedSize(Args& args) override {

to this:

  Status ExtractUncompressedSize([[maybe_unused]] Args& args) override {

I am building on Mac OS 15.7.3 (Sequoia) with Apple clang version 17.0.0 (clang-1700.6.3.2).

[jtmoon79]

I ran into this error on Ubuntu 24, gcc 13.3.0.
I built RocksDB 10.6.2, and RocksDB 10.8.3. (I just tried those two versions).
I ran build command make static_lib.

The suggested workaround, adding [[maybe_unused]], fixed it.