https://issues.dlang.org/show_bug.cgi?id=14698
--- Comment #5 from Rainer Schuetze <r.sagita...@gmx.de> --- Maybe the Windows versions don't have it? I tried >"c:\l\GDC-2.066\bin\c++filt.exe" --version GNU c++filt (crosstool-NG 1.20.0 - 20150413-2.066.1-f378f9ab41) 2.23.1 >"c:\l\GDC-2.066\bin\c++filt.exe" --format=dlang c:\l\GDC-2.066\bin\c++filt.exe: unknown demangling style `dlang' --