GNU Debugger

No idea what MinGW Installation Manager is or why you were trying to use it when you are using msys2.

To install mingw64 gdb in msys2, you really just need to:

pacman -S mingw-w64-x86_64-gdb

You should probably run pacman -Syu twice before you run the above though.

As you can see, if you need other mingw64 builds of programs (toolchain programs or not), their package names would be prefixed with mingw-w64-x86_64-. There's also the package group mingw-w64-x86_64-toolchain which you can pacman -S --needed instead to get a somewhat full toolchain.

You may also want to use the urt64 toolchain instead. See this page for more details. (You can e.g. pacman -Ss gdb to find out what's the package name prefix for each of the variants.)

Note that to use any of the toolchain (or any non-msys2 builds of programs), you should use the corresponding "launcher" of shell/terminal instead of msys2.exe.

1. download the most recent GDB from https://www.sourceware.org/gdb/download/

2. expand the gdb-7.12.1.tar.xz file: tar xopf gdb-7.12.1.tar.xz

3. cd gdb-7.12.1 in terminal to open the gdb folder

4. then follow the instructions in the README file in the gdb folder, or simply follow the following steps:

5. ./configure, wait for the terminal

6. make and wait again (which can take some time)

7. sudo make install

Now gdb is installed at /usr/local/bin/