I just tried to get tui up and it said:
Cannot enable the TUI when output is not a terminal
Which I though was odd because I thought I had it up before. Turns out it worked when I was using cmd but doesn't work using mintty.exe. The bash shell says that TERM=xterm. I also tried some other vt terminals without success. So I'm thinking that gdb isn't respecting the TERM variable.
Anyone know anything about this?
The source code for GDB (line 380 of the linked source) uses stderr.isatty() to check whether the output file (in this case MinTTY) is a terminal or not. However, this check fails using MSYS/MinGW because, according to the developer of MinTTY,
Quoting from mingw.org: “MinGW … is a minimalist development environment for native Microsoft Windows applications.” Native Windows means no tty.
Looking at this patch suggests that a workaround may be to unset the $TERM variable to enable the native Windows console driver (rather than using a Unix tty). So try unset TERM to see if that will resolve the issue.