https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106728
--- Comment #2 from John Smith <johntravolski1 at gmail dot com> --- (In reply to Andrew Pinski from comment #1) > > g++ -std=c++11 iterate.cpp -o "Z:\28sec\out.exe" > > > Does `g++ -c -std=c++11 iterate.cpp -o "\\machine_name\d\performance > testing\t.o" ` work? > > Also if it is failing like this, it is not a problem with GCC rather than > mingw. Here's what I got: ``` g++ -c -std=c++11 iterate.cpp -o "\\the-warpstar\d\perfor mance testing\t.o" Assembler messages: Fatal error: can't create \\machine_name\d\performance testing\t.o: Invalid argument ``` Same if I use the mapped drive letter Z. The mingw people told me to come here. https://github.com/brechtsanders/winlibs_mingw/issues/112 Should I go back to them? I'm confused with whom the issue actually lies.