Regarding Qt switching from Qt5.9 to Qt5.12 when Windows uses the mingw32 compiler, the solution to "C2001: There is a newline character in the constant" without modifying the encoding

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question

  The R&D project first uses Qt5.9.3 mingw32 and needs to switch to the mingw64 version of Qt5.12.7. In theory, they are all mingw32-type compilers, and there will be no newline problems like msvc, but in fact it does.
  

Solution

  Modify the text encoding first:
  

  At this time, it still doesn't work. You need to modify each file that is wrong (modify it to save it again, for example, just type a space and delete it. Then compile and pass
  :
  

  (PS: Errors are reported for multiple files, each file has to be operated once), no need to modify any codes and set encoding codes, etc.

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