https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108865
--- Comment #4 from Costas Argyris <costas.argyris at gmail dot com> --- Using the manifest approach described in: https://learn.microsoft.com/en-us/windows/apps/design/globalizing/use-utf8-code-page it is possible to convert a full existing gcc + mingw-w64 toolchain (all executables) to use UTF-8 as their active code page. The proper solution would be to integrate the UTF-8 manifest into gcc's own build process. Until that happens, and to enable existing installations to work with Unicode paths, this is the procedure to convert an existing gcc (mingw-w64) installation on Windows to use the UTF-8 code page. Requirements: 1) See above link to check if your version of Windows supports this. 2) You must have the manifest tool mt.exe installed and know its location. 3) Go to a temp dir and create a 'utf8_acp_setting.manifest' file with this content: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1"> <application> <windowsSettings> <activeCodePage xmlns="http://schemas.microsoft.com/SMI/2019/WindowsSettings";>UTF-8</activeCodePage> </windowsSettings> </application> </assembly> Assume that the current installation is at C:\mingw64. We are going to create a copy of it in C:\mingw64-UTF8 and apply the UTF-8 manifest in every executable using mt.exe. Add the folder of mt.exe to the path, for example set PATH=C:\Program Files (x86)\Windows Kits\10\bin\10.0.19041.0\x64;%PATH% ('where mt' should find it) Copy the entire C:\mingw64 directory to C:\mingw64-UTF8 from the UI or using robocopy C:\mingw64 C:\mingw64-UTF8 /e Cd into the folder where utf8_acp_setting.manifest is and run: for /F %f in ('dir /B /S C:\mingw64-UTF8\*.exe') do mt "-outputresource:%f;1" -manifest "utf8_acp_setting.manifest" After this, the toolchain under C:\mingw64-UTF8 should be able to compile the file that was previously failing. Make sure that you add C:\mingw64-UTF8\bin to the path instead of C:\mingw64\bin set PATH=C:\mingw64-UTF8\bin;%PATH% and check with 'where gcc' - it should return the one under C:\mingw64-UTF8\bin Now compile the file in the Unicode path that was previously failing: C:\Users\cargyris\temp>gcc ﹏\src.c C:\Users\cargyris\temp>echo %errorlevel% 0 no errors this time.
