Arch Linux User Repository

At least one backend is needed. The most common are listed as optional dependencies.

This package does not seem to build, could the maintainer for this package correct the issues with the pkgbuild so that it works?

Hello, there can be this problem on some installations (including mine):

/home/xxxxx/.cache/pikaur/build/lc0/PKGBUILD: line 52: gtester: command not found

It can be solved by adding core/glib2-devel as a build dependency.

@FabioLolix Yuu must pin it to the commit that corresponds to the tagged version. For instance, I can build it with the following change:

@@ -29,6 +29,8 @@

 noextract=('$_weights')

+_common='fafda0f'
+
 prepare() {
   cd "$srcdir/$pkgname-$_pkgver/libs"
   if [ -d ./lczero-common ]; then {
@@ -36,6 +38,9 @@ prepare() {
   }
   fi
   git clone https://github.com/LeelaChessZero/lczero-common.git
+
+  cd lczero-common/
+  git checkout $_common
 }

Confirming that this fail to build with devtools

[2/162] Generating 'liblc0_lib.so.p/proto/net.pb.h'
FAILED: liblc0_lib.so.p/proto/net.pb.h 
/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py --proto_path=../../libs/lczero-common --cpp_out=liblc0_lib.so.p ../../libs/lczero-common/proto/net.proto
Expected field or type:
    required string key = 1;  // name of the policy head
    ^^^
Traceback (most recent call last):
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 833, in <module>
    proto_file = ProtoFileParser(Lexer(input.read()))
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 744, in __init__
    self.ParseMessage(lexer)
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 764, in ParseMessage
    ProtoMessageParser(lexer, [self.types], [])
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 558, in __init__
    ProtoMessageParser(lexer, [self.types, *type_stack],
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 566, in __init__
    lexer.Error('Expected field or type')
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 142, in Error
    raise ValueError("Parse error: %s at line %d column %d." %
ValueError: Parse error: Expected field or type at line 144 column 4.
[3/162] Generating 'encoder_test.p/proto/net.pb.h'
FAILED: encoder_test.p/proto/net.pb.h 
/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py --proto_path=../../libs/lczero-common --cpp_out=encoder_test.p ../../libs/lczero-common/proto/net.proto
Expected field or type:
    required string key = 1;  // name of the policy head
    ^^^
Traceback (most recent call last):
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 833, in <module>
    proto_file = ProtoFileParser(Lexer(input.read()))
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 744, in __init__
    self.ParseMessage(lexer)
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 764, in ParseMessage
    ProtoMessageParser(lexer, [self.types], [])
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 558, in __init__
    ProtoMessageParser(lexer, [self.types, *type_stack],
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 566, in __init__
    lexer.Error('Expected field or type')
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 142, in Error
    raise ValueError("Parse error: %s at line %d column %d." %
ValueError: Parse error: Expected field or type at line 144 column 4.
[4/162] Generating 'lc0.p/proto/net.pb.h'
FAILED: lc0.p/proto/net.pb.h 
/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py --proto_path=../../libs/lczero-common --cpp_out=lc0.p ../../libs/lczero-common/proto/net.proto
Expected field or type:
    required string key = 1;  // name of the policy head
    ^^^
Traceback (most recent call last):
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 833, in <module>
    proto_file = ProtoFileParser(Lexer(input.read()))
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 744, in __init__
    self.ParseMessage(lexer)
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 764, in ParseMessage
    ProtoMessageParser(lexer, [self.types], [])
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 558, in __init__
    ProtoMessageParser(lexer, [self.types, *type_stack],
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 566, in __init__
    lexer.Error('Expected field or type')
  File "/build/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 142, in Error
    raise ValueError("Parse error: %s at line %d column %d." %
ValueError: Parse error: Expected field or type at line 144 column 4.
[5/162] Generating 'lc0.p/neural/onnx/onnx.pb.h'
ninja: build stopped: subcommand failed.
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /usr/bin/ninja -C /build/lc0/src/lc0-0.30.0/build/release
==> ERROR: A failure occurred in build().

This pkgbuild git clone in prepare() instead of properly configuring the git submodule (which haven't been updated in 6 years and may be the build issue cause)

Update: configured to use the git submodule but fails with another error

[3/162] Generating 'encoder_test.p/proto/net.pb.h'
FAILED: encoder_test.p/proto/net.pb.h 
/home/binarydepth/.cache/yay/lc0/src/lc0-0.30.0/scripts/compile_proto.py --proto_path=../../libs/lczero-common --cpp_out=encoder_test.p ../../libs/lczero-common/proto/net.proto
Expected field or type:
    required string key = 1;  // name of the policy head
    ^^^
Traceback (most recent call last):
  File "/home/binarydepth/.cache/yay/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 833, in <module>
    proto_file = ProtoFileParser(Lexer(input.read()))
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/binarydepth/.cache/yay/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 744, in __init__
    self.ParseMessage(lexer)
  File "/home/binarydepth/.cache/yay/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 764, in ParseMessage
    ProtoMessageParser(lexer, [self.types], [])
  File "/home/binarydepth/.cache/yay/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 558, in __init__
    ProtoMessageParser(lexer, [self.types, *type_stack],
  File "/home/binarydepth/.cache/yay/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 566, in __init__
    lexer.Error('Expected field or type')
  File "/home/binarydepth/.cache/yay/lc0/src/lc0-0.30.0/scripts/compile_proto.py", line 142, in Error
    raise ValueError("Parse error: %s at line %d column %d." %
ValueError: Parse error: Expected field or type at line 144 column 4.
[5/162] Generating 'lc0.p/neural/onnx/onnx.pb.h'
ninja: build stopped: subcommand failed.
==> ERROR: A failure occurred in build().
    Aborting...
 -> error making: lc0-exit status 4
 -> Failed to install the following packages. Manual intervention is required:
lc0 - exit status 4

Currently, it does not build due to the changes in lc0-common. Apparently, the build process cannot just willy-nilly checkout the repo and hope it works out fine. It must be tied to a specific commit

If the package doesn't build for you after upgrading to cuda-12.3.0, you will have to apply the following patch:

@@ -21,11 +21,11 @@ MESON=$(PATH="${PATH}:${HOME}/.local/bin" command -v meson || :)
 MESON=${MESON:?"Could not find meson. Is it installed and in PATH?"}

 if [ -f "${BUILDDIR}/build.ninja" ]
 then
-  "${MESON}" configure "${BUILDDIR}" -Dbuildtype="${BUILDTYPE}" -Dprefix="${INSTALL_PREFIX:-/usr/local}" "$@"
+  "${MESON}" configure "${BUILDDIR}" -Dnvcc_ccbin="/opt/cuda/bin/g++" -Dbuildtype="${BUILDTYPE}" -Dprefix="${INSTALL_PREFIX:-/usr/local}" "$@"
 else
-  "${MESON}" "${BUILDDIR}" --buildtype "${BUILDTYPE}" --prefix "${INSTALL_PREFIX:-/usr/local}" "$@"
+  "${MESON}" "${BUILDDIR}" -Dnvcc_ccbin="/opt/cuda/bin/g++" --buildtype "${BUILDTYPE}" --prefix "${INSTALL_PREFIX:-/usr/local}" "$@"
 fi

 "${MESON}" compile -C "${BUILDDIR}"

Please check the changes around Arch openblas and blas-openblas. You might need to switch depends from openblas to blas-openblas. Arch openblas package is incomplete, only blas-openblas carries the full OpenBlas Lapack suite.

Background:

Arch announced on June 14, 2023 a new blas-openblas repo package, which finally offers the full suite of OpenBLAS Lapack, with their blas implementation and corresponding cblas/lapacke interfaces.

@ivanmlerner Perhaps you could backport 37dbca48 to solve problems with building with GCC 13. I believe this is what @shahuda ran into.