gitignore binary files that have no extension

Question

How can binary files be ignored in git using the .gitignore file?

Example:

$ g++ hello.c -o hello

The

Answer 1

I don't know any other solution but adding them one by one to .gitignore.

A crude way to test is to grep the file command's output:

find . \( ! -regex '.*/\..*' \) -type f | xargs -n 1 file | egrep "ASCII|text"

EDIT

Why don't you simply name you executable hello.bin?