How can I compile the latest Stockfish from its source codes without embedded NNUE?

[hamzainaan]

000

[scchess]

Stockfish offers UCI option for you not to use NNUE.

[hamzainaan]

You are right but it compiles with NNUE file (21MB). How can I do if I have the ability to compile without an embedded NNUE file?

[ianfab]

You need to enable NNUE_EMBEDDING_OFF, see

Stockfish/src/evaluate.cpp

Lines 46 to 47 in 77eeea4

	#if !defined(_MSC_VER) && !defined(NNUE_EMBEDDING_OFF)
	INCBIN(EmbeddedNNUE, EvalFileDefaultName);

i.e., add -DNNUE_EMBEDDING_OFF to the CXXFLAGS.

[hamzainaan]

Thank you so much. I'm so grateful.

[mrdcvlsc]

You need to enable NNUE_EMBEDDING_OFF, see

Stockfish/src/evaluate.cpp

Lines 46 to 47 in 77eeea4

	#if !defined(_MSC_VER) && !defined(NNUE_EMBEDDING_OFF)
	INCBIN(EmbeddedNNUE, EvalFileDefaultName);

i.e., add -DNNUE_EMBEDDING_OFF to the CXXFLAGS.

Noob question, how can I add this flag using only make commands?

make -j4 build ARCH=x86-64 COMP=clang COMPCXX=clang++

[vondele]

CXXFLAGS=-DNNUE_EMBEDDING_OFF make -j4 build ARCH=x86-64 COMP=clang COMPCXX=clang++

[mrdcvlsc]

It's been a while but I just want to also share this.

When using make to build stockfish and if you want to keep the original values of the CXXFLAGS while disabling the the NNUE embedding, you better use (+=) CXXFLAGS+=-DNNUE_EMBEDDING_OFF instead of (=) CXXFLAGS=-DNNUE_EMBEDDING_OFF at least in my observation, because the latter seems to overwrite the CXXFLAGS values.

So it would be something like this:

make -j4 build ARCH=x86-64 COMP=clang COMPCXX=clang++ CXXFLAGS+=-DNNUE_EMBEDDING_OFF