==> Synchronizing chroot copy [/home/leming/armv7/root] -> [leming]...done
==> Making package: vapoursynth 79-1 (Thu Sep  3 16:41:57 2026)
==> Retrieving sources...
  -> Updating vapoursynth git repo...
  -> Found vapoursynth.xml
==> WARNING: Skipping verification of source file PGP signatures.
==> Validating source files with b2sums...
    vapoursynth ... Passed
    vapoursynth.xml ... Passed
==> Making package: vapoursynth 79-1 (Thu Sep  3 22:42:25 2026)
==> Checking runtime dependencies...
==> Installing missing dependencies...
resolving dependencies...
looking for conflicting packages...

Packages (1) zimg-3.0.6-2

Total Download Size:   0.10 MiB
Total Installed Size:  0.34 MiB

:: Proceed with installation? [Y/n] 
:: Retrieving packages...
 zimg-3.0.6-2-armv7h downloading...
checking keyring...
checking package integrity...
loading package files...
checking for file conflicts...
checking available disk space...
:: Processing package changes...
installing zimg...
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
==> Checking buildtime dependencies...
==> Installing missing dependencies...
resolving dependencies...
looking for conflicting packages...

Packages (30) blas-3.12.1-2  cblas-3.12.1-2  lapack-3.12.1-2  meson-1.12.0-1  ninja-1.13.2-3  patchelf-0.19.1-1  perl-error-0.17030-3  perl-mailtools-2.22-3  perl-timedate-2.35-1  python-autocommand-2.2.2-9  python-jaraco.collections-5.1.0-3  python-jaraco.context-6.1.2-1  python-jaraco.functools-4.1.0-3  python-jaraco.text-4.0.0-4  python-more-itertools-11.1.0-1  python-numpy-2.5.2-1  python-packaging-26.3-1  python-platformdirs-4.11.7-1  python-pygments-2.20.0-1  python-pyproject-hooks-1.2.0-6  python-pyproject-metadata-0.9.0-3  python-setuptools-1:84.0.0-1  python-tqdm-4.70.0-1  python-wheel-0.48.0-1  zlib-ng-2.3.3-1  cython-3.2.9-1  git-2.55.0-1  meson-python-0.20.0-1  python-build-1.6.0-1  python-installer-1.0.1-1

Total Download Size:    20.15 MiB
Total Installed Size:  171.14 MiB

:: Proceed with installation? [Y/n] 
:: Retrieving packages...
 python-numpy-2.5.2-1-armv7h downloading...
 lapack-3.12.1-2-armv7h downloading...
 cython-3.2.9-1-armv7h downloading...
 meson-1.12.0-1-any downloading...
 python-pygments-2.20.0-1-any downloading...
 python-setuptools-1:84.0.0-1-any downloading...
 blas-3.12.1-2-armv7h downloading...
 ninja-1.13.2-3-armv7h downloading...
 python-tqdm-4.70.0-1-any downloading...
 python-more-itertools-11.1.0-1-any downloading...
 patchelf-0.19.1-1-armv7h downloading...
 meson-python-0.20.0-1-any downloading...
 python-wheel-0.48.0-1-any downloading...
 cblas-3.12.1-2-armv7h downloading...
 python-platformdirs-4.11.7-1-any downloading...
 python-pyproject-metadata-0.9.0-3-any downloading...
 python-autocommand-2.2.2-9-any downloading...
 python-jaraco.collections-5.1.0-3-any downloading...
 python-jaraco.text-4.0.0-4-any downloading...
 python-jaraco.functools-4.1.0-3-any downloading...
 python-jaraco.context-6.1.2-1-any downloading...
checking keyring...
checking package integrity...
loading package files...
checking for file conflicts...
checking available disk space...
:: Processing package changes...
installing blas...
installing cblas...
installing lapack...
installing python-numpy...
Optional dependencies for python-numpy
    blas-openblas: faster linear algebra
installing python-pygments...
installing python-more-itertools...
installing python-jaraco.functools...
installing python-jaraco.context...
installing python-autocommand...
installing python-jaraco.text...
Optional dependencies for python-jaraco.text
    python-inflect: for show-newlines script
installing python-jaraco.collections...
installing python-packaging...
installing python-platformdirs...
installing python-wheel...
Optional dependencies for python-wheel
    python-keyring: for wheel.signatures
    python-xdg: for wheel.signatures
    python-setuptools: for legacy bdist_wheel subcommand [pending]
installing python-setuptools...
installing cython...
installing perl-error...
installing perl-timedate...
installing perl-mailtools...
installing zlib-ng...
installing git...
Optional dependencies for git
    git-zsh-completion: upstream zsh completion
    tk: gitk and git gui
    openssh: ssh transport and crypto
    man: show help with `git command --help`
    perl-libwww: git svn
    perl-term-readkey: git svn and interactive.singlekey setting
    perl-io-socket-ssl: git send-email TLS support
    perl-authen-sasl: git send-email TLS support
    perl-cgi: gitweb (web interface) support
    python: git svn & git p4 [installed]
    subversion: git svn
    org.freedesktop.secrets: keyring credential helper
    libsecret: libsecret credential helper [installed]
    less: the default pager for git
installing ninja...
installing python-tqdm...
Optional dependencies for python-tqdm
    python-requests: telegram
installing meson...
installing patchelf...
installing python-pyproject-metadata...
installing meson-python...
Optional dependencies for meson-python
    python-colorama: colored output
installing python-pyproject-hooks...
installing python-build...
Optional dependencies for python-build
    python-pip: to use as the Python package installer (default)
    python-uv: to use as the Python package installer
    python-virtualenv: to use virtualenv for build isolation
installing python-installer...
:: Running post-transaction hooks...
(1/3) Creating system user accounts...
Creating group 'git' with GID 967.
Creating user 'git' (git daemon user) with UID 967 and GID 967.
(2/3) Reloading system manager configuration...
  Skipped: Current root is not booted.
(3/3) Arming ConditionNeedsUpdate...
==> Retrieving sources...
  -> Found vapoursynth.xml
==> WARNING: Skipping all source file integrity checks.
==> Extracting sources...
  -> Creating working copy of vapoursynth git repo...
Cloning into 'vapoursynth'...
done.
Switched to a new branch 'makepkg'
==> Starting prepare()...
Auto-merging meson.build
==> Starting build()...
* Getting build dependencies for wheel...
* Building wheel...
+ meson setup /build/vapoursynth/src/vapoursynth /build/vapoursynth/src/vapoursynth/.mesonpy-d11ont41 -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=/build/vapoursynth/src/vapoursynth/.mesonpy-d11ont41/meson-python-native-file.ini
The Meson build system
Version: 1.12.0
Source dir: /build/vapoursynth/src/vapoursynth
Build dir: /build/vapoursynth/src/vapoursynth/.mesonpy-d11ont41
Build type: native build
Project name: VapourSynth
Project version: 79
C compiler for the host machine: cc (gcc 16.1.1 "armv7l-unknown-linux-gnueabihf-gcc (GCC) 16.1.1 20260430")
C linker for the host machine: cc ld.bfd 2.46.0
C++ compiler for the host machine: c++ (gcc 16.1.1 "c++ (GCC) 16.1.1 20260430")
C++ linker for the host machine: c++ ld.bfd 2.46.0
Cython compiler for the host machine: cython (cython 3.2.9)
Host machine cpu family: arm
Host machine cpu: armv7l
Run-time dependency dl found: YES
Program python found: YES (/usr/bin/python)
Found pkg-config: YES (/usr/bin/pkg-config) 3.0.6
Run-time dependency python found: YES 3.14
Compiler for C++ supports arguments -D_CRT_SECURE_NO_WARNINGS: YES 
Compiler for C++ supports arguments -DNOMINMAX: YES 
Compiler for C++ supports arguments -DVS_CURRENT_RELEASE=79: YES 
Compiler for C++ supports arguments -DVS_GRAPH_API: YES 
Compiler for C++ supports arguments -DVS_USE_LATEST_API: YES 
Compiler for C++ supports arguments -DVSSCRIPT_USE_LATEST_API: YES 
Compiler for C++ supports arguments -Wno-ignored-attributes: YES 
Checking if "sched_getaffinity" links: YES 
Checking if "cpuset_getaffinity" links: NO 
Run-time dependency threads found: YES
Run-time dependency zimg found: YES 3.0.6
Configuring vapoursynth.pc using configuration
Build targets in project: 5

VapourSynth 79

  User defined options
    Native files: /build/vapoursynth/src/vapoursynth/.mesonpy-d11ont41/meson-python-native-file.ini
    b_ndebug    : if-release
    b_vscrt     : md
    buildtype   : release

Found ninja-1.13.2 at /usr/bin/ninja

Generating targets:   0%|          | 0/5 eta ?
                                              

Writing build.ninja:   0%|          | 0/75 eta ?
                                                
+ /usr/bin/ninja
[1/46] Compiling C++ object libvapoursynth.so.4.p/src_core_internalfilters.cpp.o
[2/46] Compiling C++ object libvapoursynth.so.4.p/src_core_cpufeatures.cpp.o
[3/46] Compiling C++ object libvapoursynth.so.4.p/src_core_vslog.cpp.o
[4/46] Compiling C++ object libvapoursynth.so.4.p/src_core_memoryuse.cpp.o
../src/core/memoryuse.cpp:47:13: warning: 'std::size_t vs::{anonymous}::get_total_ram()' defined but not used [-Wunused-function]
[5/46] Compiling C++ object libvapoursynth.so.4.p/src_core_textfilter.cpp.o
[6/46] Compiling C++ object libvapoursynth.so.4.p/src_core_vsresize.cpp.o
[7/46] Compiling C++ object libvapoursynth.so.4.p/src_core_kernel_cpulevel.cpp.o
[8/46] Compiling C++ object libvapoursynth.so.4.p/src_core_vsapi.cpp.o
[9/46] Compiling C++ object vapoursynth.abi3.so.p/src_common_wave.cpp.o
[10/46] Compiling C++ object libvsscript.so.p/src_vsscript_vsscript.cpp.o
In file included from ../src/vsscript/vsscript.cpp:24:
../include/cython/vapoursynth_api.h:26:34: warning: 'void Py_SetProgramName(const wchar_t*)' is deprecated [-Wdeprecated-declarations]
In file included from /usr/include/python3.14/Python.h:134,
                 from ../include/cython/vapoursynth_api.h:12:
/usr/include/python3.14/pylifecycle.h:37:79: note: declared here
   37 | Py_DEPRECATED(3.11) PyAPI_FUNC(void) Py_SetProgramName(const wchar_t *);
      |                                                                               ^                
../src/vsscript/vsscript.cpp: In function 'std::pair<std::filesystem::__cxx11::path, std::filesystem::__cxx11::path> readEnvConfig(const std::filesystem::__cxx11::path&)':
../src/vsscript/vsscript.cpp:155:41: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = std::__cxx11::basic_string<char>; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
In file included from /usr/include/c++/16.1.1/filesystem:55,
                 from ../src/vsscript/vsscript.cpp:27:
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/vsscript/vsscript.cpp:159:49: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = std::__cxx11::basic_string<char>; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/vsscript/vsscript.cpp:159:84: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = std::__cxx11::basic_string<char>; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/vsscript/vsscript.cpp: In function 'void realInit()':
../src/vsscript/vsscript.cpp:206:70: warning: 'void Py_SetProgramName(const wchar_t*)' is deprecated [-Wdeprecated-declarations]
/usr/include/python3.14/pylifecycle.h:37:79: note: declared here
   37 | Py_DEPRECATED(3.11) PyAPI_FUNC(void) Py_SetProgramName(const wchar_t *);
      |                                                                               ^                
../src/vsscript/vsscript.cpp:180:15: warning: ignoring return value of 'int system(const char*)' declared with attribute 'warn_unused_result' [-Wunused-result]
[11/46] Compiling C++ object libvapoursynth.so.4.p/src_core_vscore.cpp.o
../src/core/vscore.cpp:66:79: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = char [4]; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
In file included from /usr/include/c++/16.1.1/filesystem:55,
                 from ../src/core/vscore.h:47,
                 from ../src/core/vscore.cpp:21:
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/core/vscore.cpp: In function 'void loadPlugin(const VSMap*, VSMap*, void*, VSCore*, const VSAPI*)':
../src/core/vscore.cpp:1772:49: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = const char*; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/core/vscore.cpp: In function 'void loadAllPlugins(const VSMap*, VSMap*, void*, VSCore*, const VSAPI*)':
../src/core/vscore.cpp:1780:59: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = const char*; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/core/vscore.cpp: In member function 'bool VSCore::loadPluginManifest(const std::filesystem::__cxx11::path&)':
../src/core/vscore.cpp:1887:46: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = std::__cxx11::basic_string<char>; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
[12/46] Compiling C++ object vspipe.p/src_common_wave.cpp.o
[13/46] Compiling C++ object vspipe.p/src_vspipe_ebml.cpp.o
[14/46] Compiling C++ object libvapoursynth.so.4.p/src_core_vsthreadpool.cpp.o
[15/46] Compiling C++ object vspipe.p/src_vspipe_matroska.cpp.o
[16/46] Compiling C++ object vspipe.p/src_vspipe_printgraph.cpp.o
[17/46] Compiling C++ object vspipe.p/src_vspipe_vsjson.cpp.o
[18/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_audioresampling.cpp.o
[19/46] Compiling C++ object vspipe.p/src_vspipe_vspipe.cpp.o
../src/vspipe/vspipe.cpp: In function 'int parseOptions(VSPipeOptions&, int, char**)':
../src/vspipe/vspipe.cpp:1349:67: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = char*; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
In file included from /usr/include/c++/16.1.1/filesystem:55,
                 from ../src/vspipe/vspipe.cpp:36:
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/vspipe/vspipe.cpp:1484:61: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = char*; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/vspipe/vspipe.cpp:1498:56: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = char*; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/vspipe/vspipe.cpp:1502:58: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = std::basic_string_view<char>; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
../src/vspipe/vspipe.cpp:1504:58: warning: 'std::filesystem::__cxx11::path std::filesystem::__cxx11::u8path(const _Source&) [with _Source = std::basic_string_view<char>; _Require = path; _CharT = char]' is deprecated: use 'path((const char8_t*)&*source)' instead [-Wdeprecated-declarations]
/usr/include/c++/16.1.1/bits/fs_path.h:847:5: note: declared here
[20/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_audiofilters.cpp.o
[21/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_coreplugins.cpp.o
[22/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_cpufeatures.cpp.o
[23/46] Linking target libvsscript.so
[24/46] Generating symbol file libvsscript.so.p/libvsscript.so.symbols
[25/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_boxblurfilter.cpp.o
FAILED: [code=1] libvapoursynthfilters.so.p/src_core_boxblurfilter.cpp.o 
c++ -Ilibvapoursynthfilters.so.p -I. -I.. -I../include -fvisibility=hidden -flto=auto -fdiagnostics-color=always -DNDEBUG -Wall -Winvalid-pch -std=c++20 -O3 -fno-math-errno -fno-char8_t -D_CRT_SECURE_NO_WARNINGS -DNOMINMAX -DVS_CURRENT_RELEASE=79 -DVS_GRAPH_API -DVS_USE_LATEST_API -DVSSCRIPT_USE_LATEST_API -Wno-ignored-attributes -DVS_TARGET_OS_LINUX -D_FILE_OFFSET_BITS=64 -DHAVE_SCHED_GETAFFINITY -march=armv7-a -mfloat-abi=hard -mfpu=neon -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=3 -Wformat -Werror=format-security -fstack-clash-protection -Wp,-D_GLIBCXX_ASSERTIONS -fPIC -MD -MQ libvapoursynthfilters.so.p/src_core_boxblurfilter.cpp.o -MF libvapoursynthfilters.so.p/src_core_boxblurfilter.cpp.o.d -o libvapoursynthfilters.so.p/src_core_boxblurfilter.cpp.o -c ../src/core/boxblurfilter.cpp
distcc[1351] ERROR: compile ../src/core/boxblurfilter.cpp on 10.3.0.16:3732/8 failed
distcc[1351] (dcc_build_somewhere) Warning: remote compilation of '../src/core/boxblurfilter.cpp' failed, retrying locally
distcc[1351] Warning: failed to distribute ../src/core/boxblurfilter.cpp to 10.3.0.16:3732/8, running locally instead
In file included from ../src/core/boxblurfilter.cpp:29:
../src/core/float16_helper.h: In function ‘constexpr float halfToFloat(uint16_t)’:
../src/core/float16_helper.h:42:25: error: ‘_Float16’ is not supported on this target
   42 |     return std::bit_cast<_Float16>(h);
      |                         ^
../src/core/float16_helper.h:42:25: error: ‘_Float16’ is not supported on this target
../src/core/float16_helper.h:42:17: error: parse error in template argument list
   42 |     return std::bit_cast<_Float16>(h);
      |                 ^~~~~~~~~~~~~~~~~~
../src/core/float16_helper.h:42:35: error: no matching function for call to ‘bit_cast<<expression error> >(uint16_t&)’
   42 |     return std::bit_cast<_Float16>(h);
      |            ~~~~~~~~~~~~~~~~~~~~~~~^~~
  • there is 1 candidate
In file included from /usr/include/c++/16.1.1/bits/stl_algobase.h:75,
                 from /usr/include/c++/16.1.1/bits/stl_uninitialized.h:63,
                 from /usr/include/c++/16.1.1/memory:71,
                 from ../src/core/boxblurfilter.cpp:21:
    • candidate 1: ‘template<class _To, class _From> constexpr _To std::bit_cast(const _From&) requires  sizeof (_To) == sizeof (_From) && (is_trivially_copyable_v<_To>) && (is_trivially_copyable_v<_From>)’
      /usr/include/c++/16.1.1/bit:90:5:
         90 |     bit_cast(const _From& __from) noexcept
            |     ^~~~~~~~
      • template argument deduction/substitution failed:
        • error: template argument 1 is invalid
          ../src/core/float16_helper.h:42:35:
             42 |     return std::bit_cast<_Float16>(h);
                |            ~~~~~~~~~~~~~~~~~~~~~~~^~~
../src/core/float16_helper.h: In function ‘constexpr uint16_t floatToHalf(float)’:
../src/core/float16_helper.h:66:35: error: ‘_Float16’ is not supported on this target
   66 |     return std::bit_cast<uint16_t>(_Float16(x));
      |                                   ^
../src/core/float16_helper.h:66:36: error: expected primary-expression before ‘_Float16’
   66 |     return std::bit_cast<uint16_t>(_Float16(x));
      |                                    ^~~~~~~~
distcc[1351] ERROR: compile ../src/core/boxblurfilter.cpp on localhost failed
[26/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_averageframesfilter.cpp.o
FAILED: [code=1] libvapoursynthfilters.so.p/src_core_averageframesfilter.cpp.o 
c++ -Ilibvapoursynthfilters.so.p -I. -I.. -I../include -fvisibility=hidden -flto=auto -fdiagnostics-color=always -DNDEBUG -Wall -Winvalid-pch -std=c++20 -O3 -fno-math-errno -fno-char8_t -D_CRT_SECURE_NO_WARNINGS -DNOMINMAX -DVS_CURRENT_RELEASE=79 -DVS_GRAPH_API -DVS_USE_LATEST_API -DVSSCRIPT_USE_LATEST_API -Wno-ignored-attributes -DVS_TARGET_OS_LINUX -D_FILE_OFFSET_BITS=64 -DHAVE_SCHED_GETAFFINITY -march=armv7-a -mfloat-abi=hard -mfpu=neon -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=3 -Wformat -Werror=format-security -fstack-clash-protection -Wp,-D_GLIBCXX_ASSERTIONS -fPIC -MD -MQ libvapoursynthfilters.so.p/src_core_averageframesfilter.cpp.o -MF libvapoursynthfilters.so.p/src_core_averageframesfilter.cpp.o.d -o libvapoursynthfilters.so.p/src_core_averageframesfilter.cpp.o -c ../src/core/averageframesfilter.cpp
distcc[1348] ERROR: compile ../src/core/averageframesfilter.cpp on 10.3.0.15:3732/8 failed
distcc[1348] (dcc_build_somewhere) Warning: remote compilation of '../src/core/averageframesfilter.cpp' failed, retrying locally
distcc[1348] Warning: failed to distribute ../src/core/averageframesfilter.cpp to 10.3.0.15:3732/8, running locally instead
In file included from ../src/core/averageframesfilter.cpp:34:
../src/core/float16_helper.h: In function ‘constexpr float halfToFloat(uint16_t)’:
../src/core/float16_helper.h:42:25: error: ‘_Float16’ is not supported on this target
   42 |     return std::bit_cast<_Float16>(h);
      |                         ^
../src/core/float16_helper.h:42:25: error: ‘_Float16’ is not supported on this target
../src/core/float16_helper.h:42:17: error: parse error in template argument list
   42 |     return std::bit_cast<_Float16>(h);
      |                 ^~~~~~~~~~~~~~~~~~
../src/core/float16_helper.h:42:35: error: no matching function for call to ‘bit_cast<<expression error> >(uint16_t&)’
   42 |     return std::bit_cast<_Float16>(h);
      |            ~~~~~~~~~~~~~~~~~~~~~~~^~~
  • there is 1 candidate
In file included from /usr/include/c++/16.1.1/bits/stl_algobase.h:75,
                 from /usr/include/c++/16.1.1/algorithm:62,
                 from ../src/core/averageframesfilter.cpp:21:
    • candidate 1: ‘template<class _To, class _From> constexpr _To std::bit_cast(const _From&) requires  sizeof (_To) == sizeof (_From) && (is_trivially_copyable_v<_To>) && (is_trivially_copyable_v<_From>)’
      /usr/include/c++/16.1.1/bit:90:5:
         90 |     bit_cast(const _From& __from) noexcept
            |     ^~~~~~~~
      • template argument deduction/substitution failed:
        • error: template argument 1 is invalid
          ../src/core/float16_helper.h:42:35:
             42 |     return std::bit_cast<_Float16>(h);
                |            ~~~~~~~~~~~~~~~~~~~~~~~^~~
../src/core/float16_helper.h: In function ‘constexpr uint16_t floatToHalf(float)’:
../src/core/float16_helper.h:66:35: error: ‘_Float16’ is not supported on this target
   66 |     return std::bit_cast<uint16_t>(_Float16(x));
      |                                   ^
../src/core/float16_helper.h:66:36: error: expected primary-expression before ‘_Float16’
   66 |     return std::bit_cast<uint16_t>(_Float16(x));
      |                                    ^~~~~~~~
distcc[1348] ERROR: compile ../src/core/averageframesfilter.cpp on localhost failed
[27/46] Linking target libvapoursynth.so.4
[28/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_exprfilter.cpp.o
FAILED: [code=1] libvapoursynthfilters.so.p/src_core_exprfilter.cpp.o 
c++ -Ilibvapoursynthfilters.so.p -I. -I.. -I../include -fvisibility=hidden -flto=auto -fdiagnostics-color=always -DNDEBUG -Wall -Winvalid-pch -std=c++20 -O3 -fno-math-errno -fno-char8_t -D_CRT_SECURE_NO_WARNINGS -DNOMINMAX -DVS_CURRENT_RELEASE=79 -DVS_GRAPH_API -DVS_USE_LATEST_API -DVSSCRIPT_USE_LATEST_API -Wno-ignored-attributes -DVS_TARGET_OS_LINUX -D_FILE_OFFSET_BITS=64 -DHAVE_SCHED_GETAFFINITY -march=armv7-a -mfloat-abi=hard -mfpu=neon -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=3 -Wformat -Werror=format-security -fstack-clash-protection -Wp,-D_GLIBCXX_ASSERTIONS -fPIC -MD -MQ libvapoursynthfilters.so.p/src_core_exprfilter.cpp.o -MF libvapoursynthfilters.so.p/src_core_exprfilter.cpp.o.d -o libvapoursynthfilters.so.p/src_core_exprfilter.cpp.o -c ../src/core/exprfilter.cpp
distcc[1360] ERROR: compile ../src/core/exprfilter.cpp on 10.3.0.16:3732/8 failed
distcc[1360] (dcc_build_somewhere) Warning: remote compilation of '../src/core/exprfilter.cpp' failed, retrying locally
distcc[1360] Warning: failed to distribute ../src/core/exprfilter.cpp to 10.3.0.16:3732/8, running locally instead
In file included from ../src/core/exprfilter.cpp:35:
../src/core/float16_helper.h: In function ‘constexpr float halfToFloat(uint16_t)’:
../src/core/float16_helper.h:42:25: error: ‘_Float16’ is not supported on this target
   42 |     return std::bit_cast<_Float16>(h);
      |                         ^
../src/core/float16_helper.h:42:25: error: ‘_Float16’ is not supported on this target
../src/core/float16_helper.h:42:17: error: parse error in template argument list
   42 |     return std::bit_cast<_Float16>(h);
      |                 ^~~~~~~~~~~~~~~~~~
../src/core/float16_helper.h:42:35: error: no matching function for call to ‘bit_cast<<expression error> >(uint16_t&)’
   42 |     return std::bit_cast<_Float16>(h);
      |            ~~~~~~~~~~~~~~~~~~~~~~~^~~
  • there is 1 candidate
In file included from /usr/include/c++/16.1.1/bits/stl_algobase.h:75,
                 from /usr/include/c++/16.1.1/algorithm:62,
                 from ../src/core/exprfilter.cpp:21:
    • candidate 1: ‘template<class _To, class _From> constexpr _To std::bit_cast(const _From&) requires  sizeof (_To) == sizeof (_From) && (is_trivially_copyable_v<_To>) && (is_trivially_copyable_v<_From>)’
      /usr/include/c++/16.1.1/bit:90:5:
         90 |     bit_cast(const _From& __from) noexcept
            |     ^~~~~~~~
      • template argument deduction/substitution failed:
        • error: template argument 1 is invalid
          ../src/core/float16_helper.h:42:35:
             42 |     return std::bit_cast<_Float16>(h);
                |            ~~~~~~~~~~~~~~~~~~~~~~~^~~
../src/core/float16_helper.h: In function ‘constexpr uint16_t floatToHalf(float)’:
../src/core/float16_helper.h:66:35: error: ‘_Float16’ is not supported on this target
   66 |     return std::bit_cast<uint16_t>(_Float16(x));
      |                                   ^
../src/core/float16_helper.h:66:36: error: expected primary-expression before ‘_Float16’
   66 |     return std::bit_cast<uint16_t>(_Float16(x));
      |                                    ^~~~~~~~
distcc[1360] ERROR: compile ../src/core/exprfilter.cpp on localhost failed
[29/46] Compiling C++ object libvapoursynthfilters.so.p/src_core_expr_expr.cpp.o
distcc[1372] (dcc_build_somewhere) Warning: failed to distribute, running locally instead
[30/46] Compiling Cython source /build/vapoursynth/src/vapoursynth/src/cython/vapoursynth.pyx
ninja: build stopped: subcommand failed.

TIP pass --env-dir and --sdist-extract-dir to keep the build environment and sources, then see https://build.pypa.io/en/stable/how-to/troubleshooting.html#debug-a-failed-build for help debugging a failed build
ERROR Backend subprocess exited when trying to invoke build_wheel
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Build failed, check /home/leming/armv7/leming/build
[?12l[?25h[?12l[?25h