环境：
1. Ubuntu 12.04 LTS
2. cmake 3.5.1
3. OpenCV 3.4.1源码
4. Arm Cortex-A7 NXP i.MX6Q
5. 已经sudo为root
执行过程
cd opencv-3.4.1
mkdir build
cd build
cmakd -D CMAKE_BUILD_TYPE=Relase -D CMAKE_INSTALL_PREFIX=/usr/local ..
make
make install
出错提示：
[ 0%] Built target gen-pkgconfig
[ 9%] Built target libwebp
[ 14%] Built target IlmImf
[ 20%] Built target libprotobuf
[ 23%] Built target carotene_objs
[ 24%] Built target tegra_hal
[ 24%] Built target opencv_ts_pch_dephelp
[ 24%] Built target pch_Generate_opencv_ts
[ 25%] Built target opencv_core_pch_dephelp
[ 25%] Built target pch_Generate_opencv_core
[ 31%] Built target opencv_core
[ 31%] Built target opencv_imgproc_pch_dephelp
[ 31%] Built target pch_Generate_opencv_imgproc
[ 31%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/smooth.cpp.o
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp: In function ‘void cv::vlineSmooth1N(const FT* const*, const FT*, int, ET*, int) [with ET = unsigned char, FT = {anonymous}::ufixedpoint16]’:
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2676:31: error: conversion from ‘{anonymous}::ufixedpoint32’ to ‘cv::uint8_t {aka unsigned char}’ is ambiguous
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2676:31: note: candidates are:
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:223:22: note: {anonymous}::ufixedpoint32::operator float() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:222:22: note: {anonymous}::ufixedpoint32::operator double() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:221:22: note: {anonymous}::ufixedpoint32::operator ET() const [with ET = unsigned char]
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp: In function ‘void cv::vlineSmooth1N1(const FT* const*, const FT*, int, ET*, int) [with ET = unsigned char, FT = {anonymous}::ufixedpoint16]’:
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2693:24: error: conversion from ‘const {anonymous}::ufixedpoint16’ to ‘cv::uint8_t {aka unsigned char}’ is ambiguous
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2693:24: note: candidates are:
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:289:22: note: {anonymous}::ufixedpoint16::operator float() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:288:22: note: {anonymous}::ufixedpoint16::operator double() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:287:22: note: {anonymous}::ufixedpoint16::operator ET() const [with ET = unsigned char]
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp: In function ‘void cv::vlineSmooth3N(const FT* const*, const FT*, int, ET*, int) [with ET = unsigned char, FT = {anonymous}::ufixedpoint16]’:
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2740:71: error: conversion from ‘{anonymous}::ufixedpoint32’ to ‘cv::uint8_t {aka unsigned char}’ is ambiguous
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2740:71: note: candidates are:
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:223:22: note: {anonymous}::ufixedpoint32::operator float() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:222:22: note: {anonymous}::ufixedpoint32::operator double() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:221:22: note: {anonymous}::ufixedpoint32::operator ET() const [with ET = unsigned char]
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp: In function ‘void cv::vlineSmooth5N(const FT* const*, const FT*, int, ET*, int) [with ET = unsigned char, FT = {anonymous}::ufixedpoint16]’:
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2816:109: error: conversion from ‘{anonymous}::ufixedpoint32’ to ‘cv::uint8_t {aka unsigned char}’ is ambiguous
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2816:109: note: candidates are:
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:223:22: note: {anonymous}::ufixedpoint32::operator float() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:222:22: note: {anonymous}::ufixedpoint32::operator double() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:221:22: note: {anonymous}::ufixedpoint32::operator ET() const [with ET = unsigned char]
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp: In function ‘void cv::vlineSmooth(const FT* const*, const FT*, int, ET*, int) [with ET = unsigned char, FT = {anonymous}::ufixedpoint16]’:
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2919:18: error: conversion from ‘{anonymous}::ufixedpoint32’ to ‘cv::uint8_t {aka unsigned char}’ is ambiguous
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2914:23: note: candidates are:
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:223:22: note: {anonymous}::ufixedpoint32::operator float() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:222:22: note: {anonymous}::ufixedpoint32::operator double() const
/home/linaro/opencv-3.4.1/modules/imgproc/src/fixedpoint.inl.hpp:221:22: note: {anonymous}::ufixedpoint32::operator ET() const [with ET = unsigned char]
make[2]: *** [modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/smooth.cpp.o] Error 1
make[1]: *** [modules/imgproc/CMakeFiles/opencv_imgproc.dir/all] Error 2
make: *** [all] Error 2
说明：
关键之处是
/home/linaro/opencv-3.4.1/modules/imgproc/src/smooth.cpp:2919:18: error: conversion from ‘{anonymous}::ufixedpoint32’ to ‘cv::uint8_t {aka unsigned char}’ is ambiguous
类型转换错误。
请教各位大侠，这个错误出在哪里，如何解决呢？
谢谢！
