errors occur when make FullSystem.cpp

[zhangletian2]

the errors are as follows:
make[2]: *** [CMakeFiles/dso.dir/build.make:63: CMakeFiles/dso.dir/src/FullSystem/FullSystem.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:105: CMakeFiles/dso.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

and here are the specific errors(_1 _2 _3 are also not declared)
/home/happy/dso/src/FullSystem/FullSystem.cpp:646:117: error: ‘_4’ was not declared in this scope
646 | ointsMT_Reductor, this, &optimized, &toOptimize, _1, _2, _3, _4), 0, toOptimize.size(), 50);
|

[owlshrimp]

I'm experiencing the same problem. Does anyone know when the last time was when DSO compiled successfully or what may have changed?

For me the problem first appears in dso/src/FullSystem/FullSystem.cpp

dso/src/FullSystem/FullSystem.cpp:646:109: error: ‘_2’ was not declared in this scope
646 | treadReduce.reduce(boost::bind(&FullSystem::activatePointsMT_Reductor, this, &optimized, &toOptimize, _1, _2, _3, _4), 0, toOptimize.size(), 50);
|

Though strangely it's immediately followed by suggestions of alternative definitions from various places.

[owlshrimp]

I have no idea if this is correct at all, but I got around that error by adding std::placeholders:: in front of every _1 _2 _3 and _4 in
dso/src/util/IndexThreadReduce.h
and
dso/src/FullSystem.cpp

Now there are new errors though, so something is still not right.

EDIT: 7.6MB of new errors, so I think this is clearly not the right path forward.

[lukasvst]

I think the reason is the newer Boost version.
You could try adding using namespace boost::placeholders; to line 36 of dso/src/util/IndexThreadReduce.h

That's what I did to make DM-VIO work with new Boost versions.

[owlshrimp]

That did the trick. I also had to swap:

CV_LOAD_IMAGE_GRAYSCALE with cv::IMREAD_GRAYSCALE
CV_LOAD_IMAGE_COLOR with cv::IMREAD_COLOR0
CV_LOAD_IMAGE_UNCHANGED cv::IMREAD_UNCHANGED

in dso/src/IOWrapper/OpenCV/ImageRW_OpenCV.cpp:

[minz27]

Just pointing out a small typo, it's cv::IMREAD_COLOR not cv::IMREAD_COLOR0. Thanks for posting the solution though, it works for me now