GNU Radio, One Step at a Time

Saturday, March 14, 2026

Problem with 3.10.12.0

I recently upgraded to the subject version and am now missing some blocks.

I tried to rebuild one of my blocks and the following was the result:

cmake ../

CMake Deprecation Warning at CMakeLists.txt:12 (cmake_minimum_required):

Compatibility with CMake < 3.10 will be removed from a future version of

CMake.

Update the VERSION argument <min> value. Or, use the <min>...<max> syntax

to tell CMake that the project requires at least <min> but has been updated

to work with policies introduced by <max> or earlier.

-- The CXX compiler identification is GNU 14.2.0

-- The C compiler identification is GNU 14.2.0

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Check for working CXX compiler: /usr/bin/c++ - skipped

-- Detecting CXX compile features

-- Detecting CXX compile features - done

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Check for working C compiler: /usr/bin/cc - skipped

-- Detecting C compile features

-- Detecting C compile features - done

-- Build type not specified: defaulting to release.

-- Using GMP.

CMake Warning (dev) at /usr/share/cmake-3.31/Modules/CMakeFindDependencyMacro.cmake:76 (find_package):

Policy CMP0167 is not set: The FindBoost module is removed. Run "cmake

--help-policy CMP0167" for policy details. Use the cmake_policy command to

set the policy and suppress this warning.

Call Stack (most recent call first):

/usr/lib/aarch64-linux-gnu/cmake/gnuradio/GnuradioConfig.cmake:28 (find_dependency)

CMakeLists.txt:77 (find_package)

This warning is for project developers. Use -Wno-dev to suppress it.

-- Found Boost: /usr/lib/aarch64-linux-gnu/cmake/Boost-1.83.0/BoostConfig.cmake (found suitable version "1.83.0", minimum required is "1.83.0") found components: date_time program_options system regex thread unit_test_framework

-- User set python executable /usr/bin/python3

CMake Warning (dev) at /usr/lib/aarch64-linux-gnu/cmake/gnuradio/GrPython.cmake:21 (find_package):

Policy CMP0148 is not set: The FindPythonInterp and FindPythonLibs modules

are removed. Run "cmake --help-policy CMP0148" for policy details. Use

the cmake_policy command to set the policy and suppress this warning.

Call Stack (most recent call first):

/usr/lib/aarch64-linux-gnu/cmake/gnuradio/GnuradioConfig.cmake:37 (include)

CMakeLists.txt:77 (find_package)

This warning is for project developers. Use -Wno-dev to suppress it.

-- Found PythonInterp: /usr/bin/python3 (found version "3.13.5")

CMake Warning (dev) at /usr/lib/aarch64-linux-gnu/cmake/gnuradio/GrPython.cmake:27 (find_package):

Policy CMP0148 is not set: The FindPythonInterp and FindPythonLibs modules

are removed. Run "cmake --help-policy CMP0148" for policy details. Use

the cmake_policy command to set the policy and suppress this warning.

Call Stack (most recent call first):

/usr/lib/aarch64-linux-gnu/cmake/gnuradio/GnuradioConfig.cmake:37 (include)

CMakeLists.txt:77 (find_package)

This warning is for project developers. Use -Wno-dev to suppress it.

-- Found PythonLibs: /usr/lib/aarch64-linux-gnu/libpython3.11.so (Required is exact version "3.13")

-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)

-- Found pybind11: /usr/include (found version "2.13.6")

-- Using install prefix: /usr/local

-- Building for version: v1.0-compat-xxx-xunknown / 1.0.0git

-- No C++ unit tests... skipping

-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)

-- PYTHON and GRC components are enabled

-- Python checking for pygccxml - found

-- Configuring done (10.5s)

CMake Error in python/bindings/CMakeLists.txt:

Imported target "pybind11::module" includes non-existent path

"/usr/include/python3.11"

in its INTERFACE_INCLUDE_DIRECTORIES. Possible reasons include:

* The path was deleted, renamed, or moved to another location.

* An install or uninstall procedure did not complete successfully.

* The installation package was faulty and references files it does not

provide.

-- Generating done (0.2s)

CMake Generate step failed. Build files cannot be regenerated correctly.

What is happening here?

Jim

Virus-free.www.avg.com

Re: gnuradio-digital build failure, newly appearing

Hi,
yep, latest version, I'm working on that.
But: already fixed in git, see the thread "Pybind11 ver 3.0.2 errors" on the mailing list.

Cheers,
Marcus

On 2026-03-14 3:07 PM, Greg Troxel wrote:
> I help with packaging gnuradio in pkgsrc. We have 3.10.12.0 which
> seems to be the latest, even though it's from February 2025.
>
> Sometime after December 2025, the gnuradio-digital package started
> having build errors - except perhaps on aarch64.
>
> The problem is a compiler objection to casting pointers:
> cannot convert from pointer to base class 'gr::basic_block' to pointer to derived class 'gr::digital::ofdm_carrier_allocator_cvc' via virtual base 'gr::tagged_stream_block'
>
> I have pybind11 3.0.2 installed. After downgrading to 3.0.1, it builds
> ok. (I am not running it; this is just building.)
>
> I wonder:
> - is 3.10.12.0 really the latest release?
> - might this be fixed already?
> - is anyone else running into this?
>
>
>
> => Bootstrap dependency digest>=20211023: found digest-20220214
> ===> Checking for vulnerabilities in gnuradio-digital-3.10.12.0nb9
> ===> Building for gnuradio-digital-3.10.12.0nb9
> [1/2] Building CXX object gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o
> FAILED: [code=1] gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o
> /tmp/work/ham/gnuradio-digital/work/.cwrapper/bin/c++ -DBOOST_ATOMIC_DYN_LINK -DBOOST_ATOMIC_NO_LIB -DBOOST_CHRONO_DYN_LINK -DBOOST_CHRONO_NO_LIB -DBOOST_CONTAINER_DYN_LINK -DBOOST_CONTAINER_NO_LIB -DBOOST_DATE_TIME_DYN_LINK -DBOOST_DATE_TIME_NO_LIB -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_PROGRAM_OPTIONS_NO_LIB -DBOOST_REGEX_DYN_LINK -DBOOST_REGEX_NO_LIB -DBOOST_THREAD_DYN_LINK -DBOOST_THREAD_NO_LIB -DBOOST_UNIT_TEST_FRAMEWORK_DYN_LINK -DBOOST_UNIT_TEST_FRAMEWORK_NO_LIB -DHAVE_BUILTIN_PARITYL -Ddigital_python_EXPORTS -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/cmake-pkgsrc-build/gr-digital/python/digital/bindings -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/../../../lib -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/../../../include -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/lib/../include -isystem /usr/pkg/lib/python3.13/site-packages/pybind11/include -isystem /usr/pkg/include/python3.13 -isystem /tmp/work/ham/gnuradio-digital/work/.buildlink/include -isystem /tmp/work/ham/gnuradio-digital/work/.buildlink/include/python3.13 -isystem /usr/pkg/lib/python3.13/site-packages/numpy/_core/include -O2 -pthread -I/usr/pkg/include -I/usr/include -I/usr/pkg/include/portaudio2 -I/usr/pkg/include/cppunit -DSPDLOG_FMT_EXTERNAL -I/usr/pkg/include/python3.13 -I/usr/X11R7/include -I/usr/pkg/include/glib-2.0 -I/usr/pkg/include/gio-unix-2.0 -I/usr/pkg/lib/glib-2.0/include -Dz_off_t=long -I/usr/pkg/include/freetype2 -I/usr/pkg/include/harfbuzz -I/usr/X11R7/include/libdrm -pthread -fvisibility=hidden -Wsign-compare -Wall -Wno-uninitialized -Wignored-qualifiers -Wcast-qual -fcx-limited-range -Wno-unused-command-line-argument -DNDEBUG -std=c++17 -fPIC -fvisibility=hidden -Wno-unused-variable -flto=auto -fno-fat-lto-objects -MD -MT gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o -MF gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o.d -o gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o -c /tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/ofdm_serializer_vcc_python.cc
> In file included from /usr/include/g++/memory:84,
> from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/common.h:225,
> from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/attr.h:13,
> from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/class.h:12,
> from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:12,
> from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/complex.h:12,
> from /tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/ofdm_serializer_vcc_python.cc:20:
> /usr/include/g++/bits/shared_ptr.h: In instantiation of 'std::shared_ptr<_Tp> std::static_pointer_cast(const std::shared_ptr<_Tp>&) [with _Tp = gr::digital::ofdm_carrier_allocator_cvc; _Up = gr::basic_block]':
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/holder_caster_foreign_helpers.h:40:57: required from 'static decltype ((value->shared_from_this(), bool())) pybind11::detail::holder_caster_foreign_helpers::set_via_shared_from_this(type*, std::shared_ptr<_Tp>*) [with type = gr::digital::ofdm_carrier_allocator_cvc; decltype ((value->shared_from_this(), bool())) = bool]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/holder_caster_foreign_helpers.h:60:37: required from 'static bool pybind11::detail::holder_caster_foreign_helpers::set_foreign_holder(pybind11::handle, type*, std::shared_ptr<_Tp>*) [with type = gr::digital::ofdm_carrier_allocator_cvc]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/cast.h:1051:65: required from 'bool pybind11::detail::copyable_holder_caster<type, std::shared_ptr<_Tp>, typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type>::set_foreign_holder(pybind11::handle) [with type = gr::digital::ofdm_carrier_allocator_cvc; typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type = void]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/type_caster_base.h:1207:82: required from 'bool pybind11::detail::type_caster_generic::load_impl(pybind11::handle, bool) [with ThisT = pybind11::detail::copyable_holder_caster<gr::digital::ofdm_carrier_allocator_cvc, std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>, void>]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/cast.h:980:90: required from 'bool pybind11::detail::copyable_holder_caster<type, std::shared_ptr<_Tp>, typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type>::load(pybind11::handle, bool) [with type = gr::digital::ofdm_carrier_allocator_cvc; typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type = void]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/cast.h:2171:51: [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:454:42: required from 'void pybind11::cpp_function::initialize(Func&&, Return (*)(Args ...), const Extra& ...) [with Func = pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute<pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >, {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}>::<lambda(pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool)>; Return = void; Args = {pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool}; Extra = {pybind11::name, pybind11::is_method, pybind11::sibling, pybind11::detail::is_new_style_constructor, pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:324:19: required from 'pybind11::cpp_function::cpp_function(Func&&, const Extra& ...) [with Func = pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute<pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >, {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}>::<lambda(pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool)>; Extra = {pybind11::name, pybind11::is_method, pybind11::sibling, pybind11::detail::is_new_style_constructor, pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; <template-parameter-1-3> = void]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:2249:22: required from 'pybind11::class_<type_, options>& pybind11::class_<type_, options>::def(const char*, Func&&, const Extra& ...) [with Func = pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute<pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >, {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}>::<lambda(pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool)>; Extra = {pybind11::detail::is_new_style_constructor, pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; type_ = gr::digital::ofdm_serializer_vcc; options = {gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc>}]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/init.h:388:15: required from 'void pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute(Class&, const Extra& ...) && [with Class = pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >; Extra = {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; Func = std::shared_ptr<gr::digital::ofdm_serializer_vcc> (*)(const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool); Return = std::shared_ptr<gr::digital::ofdm_serializer_vcc>; Args = {const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool}]'
> /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:2300:32: required from 'pybind11::class_<type_, options>& pybind11::class_<type_, options>::def(pybind11::detail::initimpl::factory<Args ...>&&, const Extra& ...) [with Args = {std::shared_ptr<gr::digital::ofdm_serializer_vcc> (*)(const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool), pybind11::detail::void_type (*)(), std::shared_ptr<gr::digital::ofdm_serializer_vcc>(const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool), pybind11::detail::void_type()}; Extra = {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; type_ = gr::digital::ofdm_serializer_vcc; options = {gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc>}]'
> /tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/ofdm_serializer_vcc_python.cc:69:45: required from here
> /usr/include/g++/bits/shared_ptr.h:584:23: error: cannot convert from pointer to base class 'gr::basic_block' to pointer to derived class 'gr::digital::ofdm_carrier_allocator_cvc' via virtual base 'gr::tagged_stream_block'
> 584 | return _Sp(__r, static_cast<typename _Sp::element_type*>(__r.get()));
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> cc1plus: note: unrecognized command-line option '-Wno-unused-command-line-argument' may have been intended to silence earlier diagnostics
> ninja: build stopped: subcommand failed.
> *** Error code 1
>
> Stop.
> make[1]: stopped in /n0/gdt/pkgsrc-current/pkgsrc/ham/gnuradio-digital
> *** Error code 1
>
> Stop.
> make: stopped in /usr/pkgsrc/ham/gnuradio-digital
>
>
>

gnuradio-digital build failure, newly appearing

I help with packaging gnuradio in pkgsrc. We have 3.10.12.0 which
seems to be the latest, even though it's from February 2025.

Sometime after December 2025, the gnuradio-digital package started
having build errors - except perhaps on aarch64.

The problem is a compiler objection to casting pointers:
cannot convert from pointer to base class 'gr::basic_block' to pointer to derived class 'gr::digital::ofdm_carrier_allocator_cvc' via virtual base 'gr::tagged_stream_block'

I have pybind11 3.0.2 installed. After downgrading to 3.0.1, it builds
ok. (I am not running it; this is just building.)

I wonder:
- is 3.10.12.0 really the latest release?
- might this be fixed already?
- is anyone else running into this?

=> Bootstrap dependency digest>=20211023: found digest-20220214
===> Checking for vulnerabilities in gnuradio-digital-3.10.12.0nb9
===> Building for gnuradio-digital-3.10.12.0nb9
[1/2] Building CXX object gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o
FAILED: [code=1] gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o
/tmp/work/ham/gnuradio-digital/work/.cwrapper/bin/c++ -DBOOST_ATOMIC_DYN_LINK -DBOOST_ATOMIC_NO_LIB -DBOOST_CHRONO_DYN_LINK -DBOOST_CHRONO_NO_LIB -DBOOST_CONTAINER_DYN_LINK -DBOOST_CONTAINER_NO_LIB -DBOOST_DATE_TIME_DYN_LINK -DBOOST_DATE_TIME_NO_LIB -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_PROGRAM_OPTIONS_NO_LIB -DBOOST_REGEX_DYN_LINK -DBOOST_REGEX_NO_LIB -DBOOST_THREAD_DYN_LINK -DBOOST_THREAD_NO_LIB -DBOOST_UNIT_TEST_FRAMEWORK_DYN_LINK -DBOOST_UNIT_TEST_FRAMEWORK_NO_LIB -DHAVE_BUILTIN_PARITYL -Ddigital_python_EXPORTS -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/cmake-pkgsrc-build/gr-digital/python/digital/bindings -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/../../../lib -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/../../../include -I/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/lib/../include -isystem /usr/pkg/lib/python3.13/site-packages/pybind11/include -isystem /usr/pkg/include/python3.13 -isystem /tmp/work/ham/gnuradio-digital/work/.buildlink/include -isystem /tmp/work/ham/gnuradio-digital/work/.buildlink/include/python3.13 -isystem /usr/pkg/lib/python3.13/site-packages/numpy/_core/include -O2 -pthread -I/usr/pkg/include -I/usr/include -I/usr/pkg/include/portaudio2 -I/usr/pkg/include/cppunit -DSPDLOG_FMT_EXTERNAL -I/usr/pkg/include/python3.13 -I/usr/X11R7/include -I/usr/pkg/include/glib-2.0 -I/usr/pkg/include/gio-unix-2.0 -I/usr/pkg/lib/glib-2.0/include -Dz_off_t=long -I/usr/pkg/include/freetype2 -I/usr/pkg/include/harfbuzz -I/usr/X11R7/include/libdrm -pthread -fvisibility=hidden -Wsign-compare -Wall -Wno-uninitialized -Wignored-qualifiers -Wcast-qual -fcx-limited-range -Wno-unused-command-line-argument -DNDEBUG -std=c++17 -fPIC -fvisibility=hidden -Wno-unused-variable -flto=auto -fno-fat-lto-objects -MD -MT gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o -MF gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o.d -o gr-digital/python/digital/bindings/CMakeFiles/digital_python.dir/ofdm_serializer_vcc_python.cc.o -c /tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/ofdm_serializer_vcc_python.cc
In file included from /usr/include/g++/memory:84,
from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/common.h:225,
from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/attr.h:13,
from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/class.h:12,
from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:12,
from /usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/complex.h:12,
from /tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/ofdm_serializer_vcc_python.cc:20:
/usr/include/g++/bits/shared_ptr.h: In instantiation of 'std::shared_ptr<_Tp> std::static_pointer_cast(const std::shared_ptr<_Tp>&) [with _Tp = gr::digital::ofdm_carrier_allocator_cvc; _Up = gr::basic_block]':
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/holder_caster_foreign_helpers.h:40:57: required from 'static decltype ((value->shared_from_this(), bool())) pybind11::detail::holder_caster_foreign_helpers::set_via_shared_from_this(type*, std::shared_ptr<_Tp>*) [with type = gr::digital::ofdm_carrier_allocator_cvc; decltype ((value->shared_from_this(), bool())) = bool]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/holder_caster_foreign_helpers.h:60:37: required from 'static bool pybind11::detail::holder_caster_foreign_helpers::set_foreign_holder(pybind11::handle, type*, std::shared_ptr<_Tp>*) [with type = gr::digital::ofdm_carrier_allocator_cvc]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/cast.h:1051:65: required from 'bool pybind11::detail::copyable_holder_caster<type, std::shared_ptr<_Tp>, typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type>::set_foreign_holder(pybind11::handle) [with type = gr::digital::ofdm_carrier_allocator_cvc; typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type = void]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/type_caster_base.h:1207:82: required from 'bool pybind11::detail::type_caster_generic::load_impl(pybind11::handle, bool) [with ThisT = pybind11::detail::copyable_holder_caster<gr::digital::ofdm_carrier_allocator_cvc, std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>, void>]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/cast.h:980:90: required from 'bool pybind11::detail::copyable_holder_caster<type, std::shared_ptr<_Tp>, typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type>::load(pybind11::handle, bool) [with type = gr::digital::ofdm_carrier_allocator_cvc; typename std::enable_if<pybind11::detail::copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled<type>::value, void>::type = void]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/cast.h:2171:51: [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:454:42: required from 'void pybind11::cpp_function::initialize(Func&&, Return (*)(Args ...), const Extra& ...) [with Func = pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute<pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >, {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}>::<lambda(pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool)>; Return = void; Args = {pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool}; Extra = {pybind11::name, pybind11::is_method, pybind11::sibling, pybind11::detail::is_new_style_constructor, pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:324:19: required from 'pybind11::cpp_function::cpp_function(Func&&, const Extra& ...) [with Func = pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute<pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >, {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}>::<lambda(pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool)>; Extra = {pybind11::name, pybind11::is_method, pybind11::sibling, pybind11::detail::is_new_style_constructor, pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; <template-parameter-1-3> = void]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:2249:22: required from 'pybind11::class_<type_, options>& pybind11::class_<type_, options>::def(const char*, Func&&, const Extra& ...) [with Func = pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute<pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >, {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}>::<lambda(pybind11::detail::value_and_holder&, const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool)>; Extra = {pybind11::detail::is_new_style_constructor, pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; type_ = gr::digital::ofdm_serializer_vcc; options = {gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc>}]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/detail/init.h:388:15: required from 'void pybind11::detail::initimpl::factory<Func, pybind11::detail::void_type (*)(), Return(Args ...)>::execute(Class&, const Extra& ...) && [with Class = pybind11::class_<gr::digital::ofdm_serializer_vcc, gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc> >; Extra = {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; Func = std::shared_ptr<gr::digital::ofdm_serializer_vcc> (*)(const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char>&, int, const std::__cxx11::basic_string<char>&, bool); Return = std::shared_ptr<gr::digital::ofdm_serializer_vcc>; Args = {const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool}]'
/usr/pkg/lib/python3.13/site-packages/pybind11/include/pybind11/pybind11.h:2300:32: required from 'pybind11::class_<type_, options>& pybind11::class_<type_, options>::def(pybind11::detail::initimpl::factory<Args ...>&&, const Extra& ...) [with Args = {std::shared_ptr<gr::digital::ofdm_serializer_vcc> (*)(const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool), pybind11::detail::void_type (*)(), std::shared_ptr<gr::digital::ofdm_serializer_vcc>(const std::shared_ptr<gr::digital::ofdm_carrier_allocator_cvc>&, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, int, const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool), pybind11::detail::void_type()}; Extra = {pybind11::arg, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, pybind11::arg_v, const char*}; type_ = gr::digital::ofdm_serializer_vcc; options = {gr::tagged_stream_block, std::shared_ptr<gr::digital::ofdm_serializer_vcc>}]'
/tmp/work/ham/gnuradio-digital/work/gnuradio-3.10.12.0/gr-digital/python/digital/bindings/ofdm_serializer_vcc_python.cc:69:45: required from here
/usr/include/g++/bits/shared_ptr.h:584:23: error: cannot convert from pointer to base class 'gr::basic_block' to pointer to derived class 'gr::digital::ofdm_carrier_allocator_cvc' via virtual base 'gr::tagged_stream_block'
584 | return _Sp(__r, static_cast<typename _Sp::element_type*>(__r.get()));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: note: unrecognized command-line option '-Wno-unused-command-line-argument' may have been intended to silence earlier diagnostics
ninja: build stopped: subcommand failed.
*** Error code 1

Stop.
make[1]: stopped in /n0/gdt/pkgsrc-current/pkgsrc/ham/gnuradio-digital
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/ham/gnuradio-digital

Thursday, March 12, 2026

GSoC 2026 Intro: SDR Developer interested in the 5G Cell Scanner Project

Hi everyone,

I'm Mujtaba Ahmed, a final-year Electrical Engineering student specializing in Embedded Systems. I am planning to apply for GSoC 2026 and am highly interested in contributing to the 5G Cell Scanner project.

I'm actively working in this exact domain right now. I am currently building a distributed system to detect and localize radio transmitters using TDOA algorithms, working directly with HackRF One and ADALM-PLUTO SDRs. Because I spend my time in Ubuntu bridging physical radio hardware with software-level signal processing, I am very comfortable with the exact challenges of passively detecting and capturing RF signals, and I want to bring that hands-on experience to GNU Radio.

I am setting up my development environment this weekend to compile GNU Radio from source. Are there any specific "good first issues," existing flowgraphs, or 5G protocol parsers the mentors recommend I tackle to demonstrate my skills before the formal application period opens?

Looking forward to learning from you all!

Wednesday, March 11, 2026

Re: Releasing the next 3.10.x soon – complain, please

I would like it and think I would benefit from it.

John

On Wed, Mar 11, 2026, 6:44 PM Marcus Müller <mmueller@gnuradio.org> wrote:

Hi Wael,

because I'd like to be careful about changing buffer infra on the released branch, I can do that, but would only do it if someone definitely benefits from it more than it just being included in a GNU Radio 3.11.0.0 some ~1 month in the future.

Would backporting this specifically help you / cascade? Then, it's totally doable!

Best,
Marcus

On 2026-03-10 11:49 PM, Wael Farah wrote:

Hey Marcus,

That's awesome!

Might there be a chance to include the subclassing buffer_double_mapped and the gr::buffer::on_transfer_type to the release?

They're not technically API-breaking, but I understand and respect if you have other criteria you usually follow.

Best,

Wael

On Mar 10, 2026, at 2:57 AM, Marcus Müller <mmueller@gnuradio.org> wrote:

Dear Community,

this weekend, I finally have gotten around to backport all (but one) of the changes made to `main` to `maint-3.10`, as far as I've been keeping track of them [1], or decide that they can't and/or shan't be backported.

I might have missed something! If there's some feature that doesn't need an API-breaking change to be backported that I'm missing which you'd really like to see in 3.10.13.0, let me know. I'm aiming for a release candidate coming weekend.

Best regards,
Marcus

[1] https://github.com/orgs/gnuradio/projects/12/views/1

Re: Releasing the next 3.10.x soon – complain, please

Hi Wael,

because I'd like to be careful about changing buffer infra on the released branch, I can do that, but would only do it if someone definitely benefits from it more than it just being included in a GNU Radio 3.11.0.0 some ~1 month in the future.

Would backporting this specifically help you / cascade? Then, it's totally doable!

Best,
Marcus

On 2026-03-10 11:49 PM, Wael Farah wrote:

Hey Marcus,

That's awesome!

Might there be a chance to include the subclassing buffer_double_mapped and the gr::buffer::on_transfer_type to the release?

They're not technically API-breaking, but I understand and respect if you have other criteria you usually follow.

Best,

Wael

On Mar 10, 2026, at 2:57 AM, Marcus Müller <mmueller@gnuradio.org> wrote:

Dear Community,

this weekend, I finally have gotten around to backport all (but one) of the changes made to `main` to `maint-3.10`, as far as I've been keeping track of them [1], or decide that they can't and/or shan't be backported.

I might have missed something! If there's some feature that doesn't need an API-breaking change to be backported that I'm missing which you'd really like to see in 3.10.13.0, let me know. I'm aiming for a release candidate coming weekend.

Best regards,
Marcus

[1] https://github.com/orgs/gnuradio/projects/12/views/1

interp_resampler_pfb crashes with huge samples

Hi all!

Here you can see that when the polyphase interpolator computes an index out of bounds it throws a runtime error instead of just truncating or wrapping it around.

We've encountered a situation in which a normal stream coming from a SDR has a few huge samples (~ 1e28) and this block crashes the entire flowgraph.

From my understanding of polyphase filters (thanks fharris&trondeau!), wouldn't it be better to just wrap it?

Thanks!

Francisco.