Airsim: build error

[alter409]

when I run build.cmd, the error log as follows,how to fix it?

3>已完成生成项目“D:\github\AirSim\Examples\Examples.vcxproj”(默认目标)的操作。
5>D:\github\AirSim\AirLib\include\vehicles\multirotor\RotorParams.hpp(55,59): error C2220: 以下警告被视为错误 [D:\github\Ai
rSim\AirLibUnitTests\AirLibUnitTests.vcxproj]
5>D:\github\AirSim\AirLib\include\vehicles\multirotor\RotorParams.hpp(55,59): warning C4244: “=”: 从“double”转 换到“msr
::airlib::real_T”，可能丢失数据 [D:\github\AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj]
5>D:\github\AirSim\AirLib\include\vehicles\multirotor\RotorParams.hpp(56,88): warning C4244: “=”: 从“double”转 换到“msr
::airlib::real_T”，可能丢失数据 [D:\github\AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj]
9>FinalizeBuildStatus:
正在删除文件“D:\github\AirSim\MavLinkCom\MavLinkTest\temp\MavLinkTest\x64\Debug\MavLinkTest.tlog\unsuccessfulbuild”。
正在对“D:\github\AirSim\MavLinkCom\MavLinkTest\temp\MavLinkTest\x64\Debug\MavLinkTest.tlog\MavLinkTest.lastbuilds
tate”执行 Touch 任务。
9>已完成生成项目“D:\github\AirSim\MavLinkCom\MavLinkTest\MavLinkTest.vcxproj”(默认目标)的操作。
5>已完成生成项目“D:\github\AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj”(默认目标)的操作 - 失败。
1>已完成生成项目“D:\github\AirSim\AirSim.sln”(默认目标)的操作 - 失败。

生成失败。

   “D:\github\AirSim\AirSim.sln”(默认目标) (1) ->
   “D:\github\AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj”(默认目标) (5) ->
   (ClCompile 目标) ->
     D:\github\AirSim\AirLib\include\vehicles\multirotor\RotorParams.hpp(55,59): warning C4244: “=”: 从“double” 转换到“m
   sr::airlib::real_T”，可能丢失数据 [D:\github\AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj]
     D:\github\AirSim\AirLib\include\vehicles\multirotor\RotorParams.hpp(56,88): warning C4244: “=”: 从“double” 转换到“m
   sr::airlib::real_T”，可能丢失数据 [D:\github\AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj]


   “D:\github\AirSim\AirSim.sln”(默认目标) (1) ->
   “D:\github\AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj”(默认目标) (5) ->
   (ClCompile 目标) ->
     D:\github\AirSim\AirLib\include\vehicles\multirotor\RotorParams.hpp(55,59): error C2220: 以下警告被视为错误 [D:\github\
   AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj]

2 个警告
1 个错误

已用时间 00:00:19.85

Build failed - see messages above.

[xxEoD2242]

I just had this issue. This is talking about a conversion warning that I'm pretty sure isn't going to be fixed anytime soon, since msr::airlib::real_T is a struct with whatever precision they gave it.

What I would recommend (what I did), was go to the file AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj and scroll down in the XML until you find a section that looks like this.

Once you have that, look at the tag that says DisableSpecificWarnings and add in this particular warning, which is 4244. So that line for me since I'm using that particular configuration of "Debug | x64", would be:
<DisableSpecificWarnings>4100;4244;4505;4820;4464;4514;4710;4571;5205%(DisableSpecificWarnings)</DisableSpecificWarnings>.

Once you have done that, do build.cmd again and it will compile no problem. Since it's only a conversion warning, there won't be any huge issues. Let me know if that works for you!

[keliyang]

I just had this issue. This is talking about a conversion warning that I'm pretty sure isn't going to be fixed anytime soon, since msr::airlib::real_T is a struct with whatever precision they gave it.

What I would recommend (what I did), was go to the file AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj and scroll down in the XML until you find a section that looks like this.

Once you have that, look at the tag that says DisableSpecificWarnings and add in this particular warning, which is 4244. So that line for me since I'm using that particular configuration of "Debug | x64", would be:
<DisableSpecificWarnings>4100;4244;4505;4820;4464;4514;4710;4571;5205%(DisableSpecificWarnings)</DisableSpecificWarnings>.

Once you have done that, do build.cmd again and it will compile no problem. Since it's only a conversion warning, there won't be any huge issues. Let me know if that works for you!

perfect,I solved my problem,thank you!

[alter409]

I just had this issue. This is talking about a conversion warning that I'm pretty sure isn't going to be fixed anytime soon, since msr::airlib::real_T is a struct with whatever precision they gave it.

What I would recommend (what I did), was go to the file AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj and scroll down in the XML until you find a section that looks like this.

Once you have that, look at the tag that says DisableSpecificWarnings and add in this particular warning, which is 4244. So that line for me since I'm using that particular configuration of "Debug | x64", would be:
<DisableSpecificWarnings>4100;4244;4505;4820;4464;4514;4710;4571;5205%(DisableSpecificWarnings)</DisableSpecificWarnings>.

Once you have done that, do build.cmd again and it will compile no problem. Since it's only a conversion warning, there won't be any huge issues. Let me know if that works for you!

it works for me, thank you!

[jonyMarino]

Another way would be to add a static cast in the source files. So a PR can be submitted

[Alexzzdfjcn]

I just had this issue. This is talking about a conversion warning that I'm pretty sure isn't going to be fixed anytime soon, since msr::airlib::real_T is a struct with whatever precision they gave it.

What I would recommend (what I did), was go to the file AirSim\AirLibUnitTests\AirLibUnitTests.vcxproj and scroll down in the XML until you find a section that looks like this.

Once you have that, look at the tag that says DisableSpecificWarnings and add in this particular warning, which is 4244. So that line for me since I'm using that particular configuration of "Debug | x64", would be:
<DisableSpecificWarnings>4100;4244;4505;4820;4464;4514;4710;4571;5205%(DisableSpecificWarnings)</DisableSpecificWarnings>.

Once you have done that, do build.cmd again and it will compile no problem. Since it's only a conversion warning, there won't be any huge issues. Let me know if that works for you!

it's very helpful!! thank you!