Patch for compilation error for non-optimized builds #1237
Description
| Required Info | |
|---|---|
| Camera Model | D400 |
| Firmware Version | N/A |
| Operating System & Version | Clang, Linux, Debian-based |
| Kernel Version (Linux Only) | N/A |
| Platform | PC |
| SDK Version | 2.9.0 |
Issue Description
In a non-optimized build, the following compilation error occurs. It seems to be due to a call to sort() within src/sync.cpp. The custom comparator should have a const reference arguments according to C++ standard library requirements, but the provided one has non-constant reference arguments. I'm not sure why this only occurs in non-optimized builds... perhaps the function is optimized away otherwise since we're not using it?
The attached patch fixes this by making the comparator function use const reference arguments:
realsense_non_optimized_compilation_fix.patch.txt
Compilation error:
In file included from third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:4:
In file included from third_party/librealsense2/librealsense-2.9.0/src/proc/synthetic-stream.h:6:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/processing.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/streaming.h:5:
In file included from third_party/librealsense2/librealsense-2.
9.0/src/core/options.h:8:
In file included from third_party/librealsense2/librealsense-2.9.0/src/types.h:23:
In file included from third_party/stl/gcc3/algorithm:12:
In file included from third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/algorithm:62:
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:214:11: error: no matching function for call to object of type '(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)'
if (_M_compare(__x, __x))
^~~~~~~~~~
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/predefined_ops.h:141:16: note: in instantiation of function template specialization 'std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)>::operator()<librealsense::frame_holder>' requested here
{ return bool(_M_comp(*__it, __val)); }
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_heap.h:129:42: note: in instantiation of function template specialization '__gnu_cxx::__ops::_Iter_comp_val<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> >::operator()<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, librealsense::frame_holder>' requested here
while (__holeIndex > __topIndex && __comp(__first + __parent, __value))
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_heap.h:228:12: note: in instantiation of function template specialization 'std::__push_heap<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, long, librealsense::frame_holder, __gnu_cxx::__ops::_Iter_comp_val<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__push_heap(__first, __holeIndex, __topIndex,
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_heap.h:333:9: note: in instantiation of function template specialization 'std::__adjust_heap<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, long, librealsense::frame_holder, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__adjust_heap(__first, __parent, __len, _GLIBCXX_MOVE(__value),
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1707:12: note: in instantiation of function template specialization 'std::__make_heap<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__make_heap(__first, __middle, __comp);
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1966:12: note: in instantiation of function template specialization 'std::__heap_select<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__heap_select(__first, __middle, __last, __comp);
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1981:13: note: in instantiation of function template specialization 'std::__partial_sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__partial_sort(__first, __last, __last, __comp);
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:2001:9: note: in instantiation of function template specialization 'std::__introsort_loop<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, long, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__introsort_loop(__first, __last,
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:4751:12: note: in instantiation of function template specialization 'std::__sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__sort(__first, __last, __gnu_cxx::__ops::__iter_comp_iter(__CheckedCompare(__comp)));
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:22: note: in instantiation of function template specialization 'std::sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, (lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)>' requested here
std::sort(match.begin(), match.end(), [](frame_holder& f1, frame_holder& f2)
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: candidate function not viable: 1st argument ('const librealsense::frame_holder') would lose const qualifier
std::sort(match.begin(), match.end(), [](frame_holder& f1, frame_holder& f2)
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: conversion candidate of type 'bool (*)(librealsense::frame_holder &, librealsense::frame_holder &)'
In file included from third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:4:
In file included from third_party/librealsense2/librealsense-2.9.0/src/proc/synthetic-stream.h:6:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/processing.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/streaming.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/options.h:8:
In file included from third_party/librealsense2/librealsense-2.9.0/src/types.h:23:
In file included from third_party/stl/gcc3/algorithm:12:
In file included from third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/algorithm:62:
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:216:11: error: no matching function for call to object of type '(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)'
if (_M_compare(__y, __y))
^~~~~~~~~~
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: candidate function not viable: 1st argument ('const librealsense::frame_holder') would lose const qualifier
std::sort(match.begin(), match.end(), [](frame_holder& f1, frame_holder& f2)
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: conversion candidate of type 'bool (*)(librealsense::frame_holder &, librealsense::frame_holder &)'
In file included from third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:4:
In file included from third_party/librealsense2/librealsense-2.9.0/src/proc/synthetic-stream.h:6:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/processing.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/streaming.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/options.h:8:
In file included from third_party/librealsense2/librealsense-2.9.0/src/types.h:23:
In file included from third_party/stl/gcc3/algorithm:12:
In file included from third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/algorithm:62:
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:218:17: error: no matching function for call to object of type '(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)'
bool lt = _M_compare(__x, __y);
^~~~~~~~~~
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: candidate function not viable: 1st argument ('const librealsense::frame_holder') would lose const qualifier
std::sort(match.begin(), match.end(), [](frame_holder& f1, frame_holder& f2)
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: conversion candidate of type 'bool (*)(librealsense::frame_holder &, librealsense::frame_holder &)'
In file included from third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:4:
In file included from third_party/librealsense2/librealsense-2.9.0/src/proc/synthetic-stream.h:6:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/processing.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/streaming.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/options.h:8:
In file included from third_party/librealsense2/librealsense-2.9.0/src/types.h:23:
In file included from third_party/stl/gcc3/algorithm:12:
In file included from third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/algorithm:62:
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:227:14: error: no matching function for call to object of type '(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)'
return _M_compare(__x, __y);
^~~~~~~~~~
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/predefined_ops.h:121:23: note: in instantiation of function template specialization 'std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)>::operator()<librealsense::frame_holder, librealsense::frame_holder>' requested here
{ return bool(_M_comp(*__it1, *__it2)); }
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1709:6: note: in instantiation of function template specialization '__gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> >::operator()<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > > >' requested here
if (__comp(__i, __first))
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1966:12: note: in instantiation of function template specialization 'std::__heap_select<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__heap_select(__first, __middle, __last, __comp);
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1981:13: note: in instantiation of function template specialization 'std::__partial_sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__partial_sort(__first, __last, __last, __comp);
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:2001:9: note: in instantiation of function template specialization 'std::__introsort_loop<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, long, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__introsort_loop(__first, __last,
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:4751:12: note: in instantiation of function template specialization 'std::__sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__sort(__first, __last, __gnu_cxx::__ops::__iter_comp_iter(__CheckedCompare(__comp)));
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:22: note: in instantiation of function template specialization 'std::sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, (lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)>' requested here
std::sort(match.begin(), match.end(), [](frame_holder& f1, frame_holder& f2)
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: candidate function not viable: 1st argument ('const librealsense::frame_holder') would lose const qualifier
std::sort(match.begin(), match.end(), [](frame_holder& f1, frame_holder& f2)
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55: note: conversion candidate of type 'bool (*)(librealsense::frame_holder &, librealsense::frame_holder &)'
In file included from third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:4:
In file included from third_party/librealsense2/librealsense-2.9.0/src/proc/synthetic-stream.h:6:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/processing.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/streaming.h:5:
In file included from third_party/librealsense2/librealsense-2.9.0/src/core/options.h:5:
In file included from third_party/stl/gcc3/map:12:
In file included from third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/map:60:
In file included from third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_tree.h:61:
In file included from third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algobase.h:71:
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/predefined_ops.h:166:16: error: no matching function for call to object of type 'std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)>'
{ return bool(_M_comp(__val, *__it)); }
^~~~~~~
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1861:14: note: in instantiation of function template specialization '__gnu_cxx::__ops::_Val_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> >::operator()<librealsense::frame_holder, __gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > > >' requested here
while (__comp(__val, __next))
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1888:11: note: in instantiation of function template specialization 'std::__unguarded_linear_insert<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Val_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__unguarded_linear_insert(__i,
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:1918:9: note: in instantiation of function template specialization 'std::__insertion_sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__insertion_sort(__first, __first + int(_S_threshold), __comp);
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:2004:9: note: in instantiation of function template specialization 'std::__final_insertion_sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__final_insertion_sort(__first, __last, __comp);
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:4751:12: note: in instantiation of function template specialization 'std::__sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, __gnu_cxx::__ops::_Iter_comp_iter<std::_CheckedCompare<(lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)> > >' requested here
std::__sort(__first, __last, __gnu_cxx::__ops::__iter_comp_iter(__CheckedCompare(__comp)));
^
third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:22: note: in instantiation of function template specialization 'std::sort<__gnu_cxx::__normal_iterator<librealsense::frame_holder *, std::vector<librealsense::frame_holder, std::allocator<librealsense::frame_holder> > >, (lambda at third_party/librealsense2/librealsense-2.9.0/src/sync.cpp:323:55)>' requested here
std::sort(match.begin(), match.end(), [](frame_holder& f1, frame_holder& f2)
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:213:10: note: candidate template ignored: substitution failure [with _Tp = librealsense::frame_holder]
bool operator()(const _Tp& __x, const _Tp& __y) {
^
third_party/crosstool/v18/stable/toolchain/bin/../lib/gcc/x86_64-grtev4-linux-gnu/4.9.x-google/../../../../x86_64-grtev4-linux-gnu/include/c++/4.9.x-google/bits/stl_algo.h:226:10: note: candidate template ignored: substitution failure [with _Tp1 = librealsense::frame_holder, _Tp2 = librealsense::frame_holder]
bool operator()(const _Tp1& __x, const _Tp2& __y) {
^
5 errors generated.