Error in building

[zjuzuhe]

I'm getting some errors when I'm trying to build the library.And I need some advice.

Environment info

Operating System: Windows 10 x64
Compiler: Visual Studio 14 2015 Win 64/ openblas + CUDA SDK 8.0.44

Error Message

I have used cmake-3.10.1 to obtian the bulid folder.Then I try to bulid the libmxnet.dll. However, I am having difficulties compiling the .sln file.This is the error message part:

2>  Building NVCC (Device) object CMakeFiles/cuda_compile_1.dir/src/ndarray/Release/cuda_compile_1_generated_ndarray_function.cu.obj
2>  ndarray_function.cu
2>d:\python3ex\mxnetyolo\mxnet\dmlc-core\include\dmlc\./optional.h(26): warning : "constexpr" is ignored here in Microsoft mode
2>
2>d:\python3ex\mxnetyolo\mxnet\dmlc-core\include\dmlc\./optional.h(26): warning : "constexpr" is ignored here in Microsoft mode
2>
2>  ndarray_function.cu
2>  Building NVCC (Device) object CMakeFiles/cuda_compile_1.dir/src/operator/Release/cuda_compile_1_generated_activation.cu.obj
2>  activation.cu
2>d:\python3ex\mxnetyolo\mxnet\dmlc-core\include\dmlc\./optional.h(26): warning : "constexpr" is ignored here in Microsoft mode
2>
2>d:\python3ex\mxnetyolo\mxnet\dmlc-core\include\dmlc\./optional.h(26): warning : "constexpr" is ignored here in Microsoft mode
2>
2>  activation.cu
2>  Building NVCC (Device) object CMakeFiles/cuda_compile_1.dir/src/operator/Release/cuda_compile_1_generated_batch_norm.cu.obj
2>  batch_norm.cu
2>d:\python3ex\mxnetyolo\mxnet\dmlc-core\include\dmlc\./optional.h(26): warning : "constexpr" is ignored here in Microsoft mode
2>
2>d:\python3ex\mxnetyolo\mxnet\dmlc-core\include\dmlc\./optional.h(26): warning : "constexpr" is ignored here in Microsoft mode
2>
2>  batch_norm.cu
2>  Building NVCC (Device) object CMakeFiles/cuda_compile_1.dir/src/operator/Release/cuda_compile_1_generated_batch_norm_v1.cu.obj
2>  batch_norm_v1.cu
2>d:\python3ex\mxnetyolo\mxnet\dmlc-core\include\dmlc\./optional.h(26): warning : "constexpr" is ignored here in Microsoft mode

help please.

[zhreshold]

please show where error occurs, these are warnings which don't matter.

[zjuzuhe]

My apologies.Error like that

1>  yolo_output.cu
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>d:\python3ex\mxnetyolo\mxnet\src\operator\contrib\./yolo_output-inl.h(61): error C2398: conversion from 'double' to 'float' requires a narrowing conversion
1>  CMake Error at cuda_compile_1_generated_yolo_output.cu.obj.Release.cmake:279 (message):
1>    Error generating file
1>    D:/python3ex/mxnetyolo/mxnet/build/CMakeFiles/cuda_compile_1.dir/src/operator/contrib/Release/cuda_compile_1_generated_yolo_output.cu.obj

And the statements in line 61:

    DMLC_DECLARE_FIELD(anchors)
    .set_default({1.08, 1.19, 3.42, 4.41, 6.63, 11.38, 9.42, 5.11, 16.62, 10.52})
    .describe("Predefined anchor box widths and heights.");

[zhreshold]

Use

.set_default({1.08f, 1.19f, 3.42f, 4.41f, 6.63f, 11.38f, 9.42f, 5.11f, 16.62f, 10.52f})

for visual studio, I will fix it later.

[zjuzuhe]

Thx.I had force it to be float in another way.
It seems to be OK.