The program that will be run when the `:make` command is executed.
When you run the
:make [arguments] command, Vim runs the program defined in the
makeprg variable. The default for
makeprg is simply the "make" program (with the arguments as defined in the
[arguments] part of the command) but it can be changed.
It is common to have different
makeprg configurations for different file formats, see autocmd for information on how to perform this.
Since different programs may require extra arguments, you can use Vim expansions in
%expands to name of the file being edited.
#expands to the name of the alternate file.
%<expands to the name of the current file without the extension.
set makeprg=ghc\ %<
set makeprg=python\ %