I built the .dll's using VS2017 as compiler with MSVC2015 qt qmake.
Follow the below steps to build your own webengine support for 32bit application.
- Open "X86 native tools command prompt for VS 2017"
- Command: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Auxiliary\Build\vcvarsall.bat" x86
- Command: C:\Qt\Qt5.11.1\5.11.1\msvc2015\bin\qmake.exe C:\Qt\Qt5.11.1\5.11.1\Src\qtwebengine -- -webengine-proprietary-codecs
- Command: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.16.27023\bin\Hostx86\x86\nmake.exe"
It will take time to build (apprx. 4-5hrs)
Then your dlls will be placed in the path "C:\Qt\Qt5.11.1\5.11.1\msvc2015\bin".
Enjoy and do coding lovely even to support 32bit applications.