support build on OS with non-UTF8 as default charset

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[codecov-commenter]

Codecov Report

Base: 39.94% // Head: 39.94% // No change to project coverage 👍

Coverage data is based on head (e18bc73) compared to base (7fbdc6d).
Patch has no changes to coverable lines.

❗ Current head e18bc73 differs from pull request most recent head afb5bb3. Consider uploading reports for the commit afb5bb3 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #96   +/-   ##
=========================================
  Coverage     39.94%   39.94%           
  Complexity     1494     1494           
=========================================
  Files           145      145           
  Lines          9492     9492           
  Branches       1192     1192           
=========================================
  Hits           3792     3792           
  Misses         5320     5320           
  Partials        380      380           

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