v0.32.0-rc2

[borg323]

In this version:

• Fix for onnx-trt bug, where the wrong network could be used from the cache.
• Added code to detect RPE nets and give an error instead of bad results.
• Better instructions in the readme and install script for onnx-trt.
• Made UCI_ShowWDL again off by default again as some GUIs have issues.
• Fixed a long standing issue when compiled with -ffast-math (or icx -O3).
• Several improvements to the sycl backend.
• Several improvements to the metal backend.
• Refactored the rescorer code and training data header to make them usable by external tools.
• Relaxed cuda/cudnn version checks so that no warnings are shown for mismatched versions that are supported.
• Several build system updates.
• Assorted small fixes and improvements.

---

This discussion was created from the release v0.32.0-rc2.

[sroller]

On Ubuntu 24.04 with a NVidia RTX 3060 I could not build the source as described.
To make it work I had to call

CXXFLAGS="-I/usr/include/eigen3" meson setup build --reconfigure
ninja -C build

then it worked.

[borg323]

What was the error?

[sroller]

I used the build.sh script.
the last lines of output were like this:

Found ninja-1.11.1 at /usr/bin/ninja
WARNING: Running the setup command as `meson [options]` instead of `meson setup [options]` is ambiguous and deprecated.
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /usr/bin/ninja -C /home/steffenr/lc0/build/release
ninja: Entering directory `/home/steffenr/lc0/build/release'
[215/326] Compiling C++ object lc0.p/src_neural_backends_blas_convolution1.cc.o
FAILED: lc0.p/src_neural_backends_blas_convolution1.cc.o
c++ -Ilc0.p -I. -I../.. -I../../src -I../../src/neural/backends/cuda -Isubprojects/abseil-cpp-20240722.0 -I../../subprojects/abseil-cpp-20240722.0 -flto=auto -fdiagnostics-color=always -DNDEBUG -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Wpedantic -std=c++20 -O3 -march=native -DHAS_FLOAT16 -DNO_PEXT -pthread -isystem../../subprojects/abseil-cpp-20240722.0 -isystemsubprojects/abseil-cpp-20240722.0 -isystem/usr/lib/cuda/include -isystem/usr/local/cuda/include -isystem../../third_party -MD -MQ lc0.p/src_neural_backends_blas_convolution1.cc.o -MF lc0.p/src_neural_backends_blas_convolution1.cc.o.d -o lc0.p/src_neural_backends_blas_convolution1.cc.o -c ../../src/neural/backends/blas/convolution1.cc
../../src/neural/backends/blas/convolution1.cc:22:10: fatal error: Eigen/Dense: No such file or directory
   22 | #include <Eigen/Dense>
      |          ^~~~~~~~~~~~~
compilation terminated.
[224/326] Generating cuda fp16 code with a custom command
ninja: build stopped: subcommand failed.

[borg323]

Thanks. Can you look a bit further up, towards the start of the loop and see what it says about "dependency eigen3"? Here is what I see:

Run-time dependency eigen3 found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency eigen3

[sroller]

Run-time dependency eigen3 found: YES 3.4.0

here's the complete log
eigen3.log

[borg323]

Thank you, really appreciate taking the time for all those tests.

[sroller]

I was also able to compile on CentOS 9 x86_64 without a GPU.
I couldn't compile v0.32.0-rc2 on a Raspberry Pi 5, but I could build the latest master - if that's of any interest to you.

[borg323]

I couldn't compile v0.32.0-rc2 on a Raspberry Pi 5, but I could build the latest master

This is very strange, there is no code difference. Here is the diff of the two trees:

diff --git a/.circleci/config.yml b/.circleci/config.yml
index f6c837b7..567b4fe0 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -121,7 +121,7 @@ jobs:
             gh release upload \
               "$CIRCLE_TAG" \
               /tmp/lc0-$CIRCLE_TAG-macos_12.6.1 \
-              --clobber
+              --clobber --repo LeelaChessZero/lc0
 workflows:
   version: 2
   builds:
diff --git a/src/version.inc b/src/version.inc
index fb2de25c..ccb71f6d 100644
--- a/src/version.inc
+++ b/src/version.inc
@@ -1,4 +1,4 @@
 #define LC0_VERSION_MAJOR 0
-#define LC0_VERSION_MINOR 32
+#define LC0_VERSION_MINOR 33
 #define LC0_VERSION_PATCH 0
-#define LC0_VERSION_POSTFIX "rc2"
+#define LC0_VERSION_POSTFIX "dev"

[borg323]

BTW, I'm interested in all build errors.

[sroller]

I take it back. There were tons of warnings building lc0 v0.32.0-rc2 on the Pi but no errors. The created binary works.