I get gdb by brew install gdb.
brew install gdb
The source file content is:
#include int main(){ int a = 10; for(int i = 0; i<
I published a temporary brew formula that seems to work, while awaiting for official brew formula to be updated:
brew install https://raw.githubusercontent.com/timotheecour/homebrew-timutil/master/gdb_tim.rb