My favorite answer to this was posted by Chris Down at Unix & Linux Stack Exchange. I'll quote.
This is how the bash completion module for
make
gets its list:make -qp | awk -F':' '/^[a-zA-Z0-9][^$#\/\t=]*:([^=]|$)/ {split($1,A,/ /);for(i in A)print A[i]}'
It prints out a newline-delimited list of targets, without paging.
User Brainstone suggests piping to sort -u
to remove duplicate entries:
make -qp | awk -F':' '/^[a-zA-Z0-9][^$#\/\t=]*:([^=]|$)/ {split($1,A,/ /);for(i in A)print A[i]}' | sort -u
Source: How to list all targets in make? (Unix&Linux SE)