Arch Linux User Repository

This package provides the cli version of waifu2x-caffe. A readme for all of the flags is located in /usr/share/docs/waifu2x-caffe/README. The models are located at /usr/share/waifu2x-caffe/models.

@ginnokami By using makepkg.conf, naturally (https://wiki.archlinux.org/title/Makepkg#Building_optimized_binaries) and by having Clang installed.

I build almost all packages with Clang.

@Neko-san No idea how you are getting clang into the chroot. This uses gcc to compile.

I can't get this to build for some reason, even in a chroot :/

-- The C compiler identification is Clang 15.0.7
-- The CXX compiler identification is Clang 15.0.7
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Deprecation Warning at caffe/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- The CUDA compiler identification is NVIDIA 12.2.91
-- Detecting CUDA compiler ABI info
-- Detecting CUDA compiler ABI info - done
-- Check for working CUDA compiler: /opt/cuda/bin/nvcc - skipped
-- Detecting CUDA compile features
-- Detecting CUDA compile features - done
CMake Warning (dev) at caffe/cmake/Misc.cmake:32 (set):
  implicitly converting 'BOOLEAN' to 'STRING' type.
Call Stack (most recent call first):
  caffe/CMakeLists.txt:33 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - no
CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find Threads (missing: Threads_FOUND)
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake/Modules/FindThreads.cmake:226 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  /usr/share/cmake/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
  /usr/lib/cmake/boost_thread-1.81.0/boost_thread-config.cmake:118 (find_dependency)
  /usr/lib/cmake/Boost-1.81.0/BoostConfig.cmake:141 (find_package)
  /usr/lib/cmake/Boost-1.81.0/BoostConfig.cmake:262 (boost_find_component)
  /usr/share/cmake/Modules/FindBoost.cmake:594 (find_package)
  caffe/cmake/Dependencies.cmake:8 (find_package)
  caffe/CMakeLists.txt:83 (include)


-- Configuring incomplete, errors occurred!
==> ERROR: A failure occurred in prepare().
    Aborting...

@nx-que Thank you for the patch. I confirmed that it builds in a chroot and have updated it here.

It seems there were quite a few breaking changes, here is a working PKGBUILD patch

diff --git a/PKGBUILD b/PKGBUILD
index 462777b..8a0c383 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -24,7 +24,7 @@ depends=(
 makedepends=(
     'git'
     'cmake'
-    'qt5-base'
+    'qt6-base'
 )
 optdepends=()
 provides=('waifu2x-caffe')
@@ -55,15 +55,20 @@ prepare() {
     cd "${srcdir}/waifu2x-caffe"
     git submodule update --init --recursive

-    # Change Source.cpp to update the model file location
-    sed -i 's+models/cunet+/usr/share/waifu2x-caffe/models/cunet+g' waifu2x-caffe/Source.cpp
-    
     # create symlink to caffe
     ln -sf ../caffe ./caffe
     ln -sf ../caffe ./libcaffe

+    # compile targets under C++17
+    sed -i 's~-std=c++14~-std=c++17~g' CMakeLists.txt
+    sed -i 's~-std=c++14~-std=c++17~g' caffe/Makefile.config
+    sed -i 's~-std=c++14~-std=c++17~g' caffe/Makefile.config.example
+
+    # Change Source.cpp to update the model file location
+    sed -i 's+models/cunet+/usr/share/waifu2x-caffe/models/cunet+g' waifu2x-caffe/Source.cpp
+
     cd ${srcdir}/build
-    cmake "${srcdir}/waifu2x-caffe" -DCUDA_NVCC_FLAGS="-D_FORCE_INLINES  -gencode arch=compute_86,code=sm_86 "
+    cmake "${srcdir}/waifu2x-caffe" -DCMAKE_EXE_LINKER_FLAGS="-Wl,--copy-dt-needed-entries" -DCMAKE_SHARED_LINKER_FLAGS="-Wl,--copy-dt-needed-entries" -DCUDA_NVCC_FLAGS="-D_FORCE_INLINES  -gencode arch=compute_86,code=sm_86 "
     # Fix issue with the compile failing. These flags need to be removed from the CUDA_FLAGS, but I can't find which CMakeFile is generating this line. So just remove it with sed.
     sed -i 's/-Xcudafe --diag_suppress=set_but_not_used -DBOOST_ALL_NO_LIB;-DUSE_LMDB;-DUSE_LEVELDB;-DUSE_CUDNN;-DUSE_OPENCV;-DWITH_PYTHON_LAYER//g' libcaffe/src/caffe/CMakeFiles/caffe.dir/flags.make
 }

Bumped everything to C++17 (forced by other dependencies), libopencv_highgui requires qt6-base libraries now and applied (temporary) workaround for linker failure around this protobuf issue until it's fixed upstream.
Note that missing headers for cblas is still an issue, when blas-openblas is installed.

Unable to build this with clean chroot for a while now, seems to spit a lot of generic C++ errors. This is a wild guess, but to me it seems one of build dependencies requires c++17 now, taking this opencv issue as point of reference.

In file included from /usr/include/google/protobuf/stubs/common.h:44,
                 from /usr/include/google/protobuf/io/coded_stream.h:130,
                 from .build_release/src/caffe/proto/caffe.pb.h:24,
                 from tools/compute_image_mean.cpp:11:
/usr/include/absl/strings/string_view.h:52:26: error: ‘string_view’ in namespace ‘std’ does not name a type
   52 | using string_view = std::string_view;
      |                          ^~~~~~~~~~~
/usr/include/absl/strings/string_view.h:52:21: note: ‘std::string_view’ is only available from C++17 onwards
   52 | using string_view = std::string_view;
      |          

Also seems to have issues with cblas headers if blas-openblas (which should provide cblas) is used instead openblas as make dependency - it's fine right now in chroot, but gives include errors when built on host using blas-openblas.

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.

@lurkingaround This happens because that library (which is linked against when compiling waifu2x) got updated. When this happens you will need to rebuild waifu2x. I will try to update the package rel when I notice it happening, but if you notice before I do just make a comment like you did and just rebuild for the meantime.

Getting this error.

waifu2x-caffe: error while loading shared libraries: libboost_filesystem.so.1.80.0: cannot open shared object file: No such file or directory

@lurkingaround I am able to build this in a chroot. So I believe you have somehow configured your path so that CMake can't find CUDA.