Error while compailing for raspberry pi "error: no matching function for call to ‘min(size_t&, long unsigned int)’"

[overclock98]

I'm trying to build torchvision on raspberry pi but getting thiss error. how can i fix?

/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:58:47: error: no matching function for call to ‘min(size_t&, long unsigned int)’
buffer_.resize(std::min(maxBytes, 4 * 1024UL));
^
In file included from /usr/include/c++/8/bits/char_traits.h:39,
from /usr/include/c++/8/string:40,
from /usr/include/c++/8/stdexcept:39,
from /usr/include/c++/8/array:39,
from /home/pi/vision/torchvision/csrc/cpu/decoder/defs.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:1:
/usr/include/c++/8/bits/stl_algobase.h:195:5: note: candidate: ‘template constexpr const _Tp& std::min(const _Tp&, const _Tp&)’
min(const _Tp& __a, const _Tp& __b)
^~~
/usr/include/c++/8/bits/stl_algobase.h:195:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:58:47: note: deduced conflicting types for parameter ‘const Tp’ (‘unsigned int’ and ‘long unsigned int’)
buffer.resize(std::min(maxBytes, 4 * 1024UL));
^
In file included from /usr/include/c++/8/bits/char_traits.h:39,
from /usr/include/c++/8/string:40,
from /usr/include/c++/8/stdexcept:39,
from /usr/include/c++/8/array:39,
from /home/pi/vision/torchvision/csrc/cpu/decoder/defs.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:1:
/usr/include/c++/8/bits/stl_algobase.h:243:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)’
min(const _Tp& __a, const _Tp& __b, _Compare __comp)
^~~
/usr/include/c++/8/bits/stl_algobase.h:243:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:58:47: note: deduced conflicting types for parameter ‘const Tp’ (‘unsigned int’ and ‘long unsigned int’)
buffer.resize(std::min(maxBytes, 4 * 1024UL));
^
In file included from /usr/include/c++/8/algorithm:62,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Registry.h:12,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Flags.h:36,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Logging.h:12,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:2:
/usr/include/c++/8/bits/stl_algo.h:3450:5: note: candidate: ‘template constexpr _Tp std::min(std::initializer_list<_Tp>)’
min(initializer_list<_Tp> __l)
^~~
/usr/include/c++/8/bits/stl_algo.h:3450:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:58:47: note: mismatched types ‘std::initializer_list<Tp>’ and ‘unsigned int’
buffer.resize(std::min(maxBytes, 4 * 1024UL));
^
In file included from /usr/include/c++/8/algorithm:62,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Registry.h:12,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Flags.h:36,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Logging.h:12,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:2:
/usr/include/c++/8/bits/stl_algo.h:3456:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr _Tp std::min(std::initializer_list<_Tp>, _Compare)’
min(initializer_list<Tp> l, Compare comp)
^~~
/usr/include/c++/8/bits/stl_algo.h:3456:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:58:47: note: mismatched types ‘std::initializer_list<Tp>’ and ‘unsigned int’
buffer.resize(std::min(maxBytes, 4 * 1024UL));
^
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:69:24: warning: comparison of integer expressions of different signedness: ‘long int’ and ‘size_t’ {aka ‘unsigned int’} [-Wsign-compare]
while (!eof && end < maxBytes && (hasTime = watcher())) {
~~~~~^~~~~~~~~~
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:74:16: warning: comparison of integer expressions of different signedness: ‘long int’ and ‘std::vector::size_type’ {aka ‘unsigned int’} [-Wsign-compare]
if (end == buffer.size()) {
~~~~~^~~~~~~~~~~~~~~~~
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:75:53: error: no matching function for call to ‘min(long unsigned int, size_t&)’
buffer.resize(std::min(end * 4UL, maxBytes));
^
In file included from /usr/include/c++/8/bits/char_traits.h:39,
from /usr/include/c++/8/string:40,
from /usr/include/c++/8/stdexcept:39,
from /usr/include/c++/8/array:39,
from /home/pi/vision/torchvision/csrc/cpu/decoder/defs.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:1:
/usr/include/c++/8/bits/stl_algobase.h:195:5: note: candidate: ‘template constexpr const _Tp& std::min(const _Tp&, const _Tp&)’
min(const _Tp& __a, const _Tp& _b)
^~~
/usr/include/c++/8/bits/stl_algobase.h:195:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:75:53: note: deduced conflicting types for parameter ‘const Tp’ (‘long unsigned int’ and ‘size_t’ {aka ‘unsigned int’})
buffer.resize(std::min(end * 4UL, maxBytes));
^
In file included from /usr/include/c++/8/bits/char_traits.h:39,
from /usr/include/c++/8/string:40,
from /usr/include/c++/8/stdexcept:39,
from /usr/include/c++/8/array:39,
from /home/pi/vision/torchvision/csrc/cpu/decoder/defs.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.h:3,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:1:
/usr/include/c++/8/bits/stl_algobase.h:243:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)’
min(const _Tp& __a, const _Tp& __b, _Compare _comp)
^~~
/usr/include/c++/8/bits/stl_algobase.h:243:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:75:53: note: deduced conflicting types for parameter ‘const Tp’ (‘long unsigned int’ and ‘size_t’ {aka ‘unsigned int’})
buffer.resize(std::min(end * 4UL, maxBytes));
^
In file included from /usr/include/c++/8/algorithm:62,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Registry.h:12,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Flags.h:36,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Logging.h:12,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:2:
/usr/include/c++/8/bits/stl_algo.h:3450:5: note: candidate: ‘template constexpr _Tp std::min(std::initializer_list<_Tp>)’
min(initializer_list<_Tp> _l)
^~~
/usr/include/c++/8/bits/stl_algo.h:3450:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:75:53: note: mismatched types ‘std::initializer_list<Tp>’ and ‘long unsigned int’
buffer.resize(std::min(end * 4UL, maxBytes));
^
In file included from /usr/include/c++/8/algorithm:62,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Registry.h:12,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Flags.h:36,
from /home/pi/.local/lib/python3.7/site-packages/torch/include/c10/util/Logging.h:12,
from /home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:2:
/usr/include/c++/8/bits/stl_algo.h:3456:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr _Tp std::min(std::initializer_list<_Tp>, _Compare)’
min(initializer_list<_Tp> __l, _Compare _comp)
^~~
/usr/include/c++/8/bits/stl_algo.h:3456:5: note: template argument deduction/substitution failed:
/home/pi/vision/torchvision/csrc/cpu/decoder/seekable_buffer.cpp:75:53: note: mismatched types ‘std::initializer_list<Tp>’ and ‘long unsigned int’
buffer.resize(std::min(end * 4UL, maxBytes));
^
error: command 'arm-linux-gnueabihf-gcc' failed with exit status 1

[overclock98]

issue solved.

https://github.com/nmilosev/pytorch-arm-builds/blob/master/pytorch-armv7hl.sh

I updated the packages and flags mentioned in the above file, that's it ¯_(ツ)_/¯

[jekriske-lilly]

So your solution was to drop the version to 0.4.0?

For me, I had to explicitly cast to size_t (preferred) or uint at:

https://github.com/pytorch/vision/blob/master/torchvision/csrc/cpu/decoder/seekable_buffer.cpp#L58
https://github.com/pytorch/vision/blob/master/torchvision/csrc/cpu/decoder/seekable_buffer.cpp#L75
and
https://github.com/pytorch/vision/blob/master/torchvision/csrc/cpu/decoder/util.cpp#L398-L399

[fmassa]

@jekriske-lilly can you send a PR with the casts that you mentioned?

[jekriske-lilly]

@fmassa Created #2389

[fmassa]

Merged #2389, so this should hopefully fix the issues that @overclock98 was seeing.

[DoubleJ9279]

So your solution was to drop the version to 0.4.0?

For me, I had to explicitly cast to size_t (preferred) or uint at:

https://github.com/pytorch/vision/blob/master/torchvision/csrc/cpu/decoder/seekable_buffer.cpp#L58
https://github.com/pytorch/vision/blob/master/torchvision/csrc/cpu/decoder/seekable_buffer.cpp#L75
and
https://github.com/pytorch/vision/blob/master/torchvision/csrc/cpu/decoder/util.cpp#L398-L399

it works~ for me

[jekriske-lilly]

@DoubleJ9279 yes the changes were merged.