Makefile install flags incompatible with macOs version of `install`

## description While trying to `sudo make install` under macOs the `-D` flag returns an error as it is not defined While this is the linux behaviour ([docs](https://linux.die.net/man/1/install)) ``` -D create all leading components of DEST except the last, then copy SOURCE to DEST ``` Looks like there is no equivalent under macOs, closest is `-d` From `man install`: ``` -d Create directories. Missing parent directories are created as required. ``` which still does not work with how the current Makefile is written ## working version I ran a modified version with this and it worked: ```Makefile PREFIX ?= /usr/local # just to mirror where Homebrew puts symlinks, not sure if the best option BINARY_NAME=dynomark all: build build: go build -o ${BINARY_NAME} . run: go build -o ${BINARY_NAME} . ./${BINARY_NAME} install: @install -m755 ${BINARY_NAME} $(DESTDIR)$(PREFIX)/bin/${BINARY_NAME} # removed -D flag uninstall: @rm -f $(DESTDIR)$(PREFIX)/bin/${BINARY_NAME} clean: go clean rm ${BINARY_NAME} ``` ## conclusion I'm not sure if my version makes sense from a _best-practices_ point of view as I could not find resources to confirm it. I still think it could be useful to add a warning in the README for this mismatch between operating systems.