[GRASS-git] [OSGeo/grass] daa8cd: make: Add support for Makefile variable DESTDIR (#...

[nilason]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: daa8cd7f96060685901e7fa990a9d4ba96da9398
      https://github.com/OSGeo/grass/commit/daa8cd7f96060685901e7fa990a9d4ba96da9398
  Author: nilason <n_larsson at yahoo.com>
  Date:   2021-02-17 (Wed, 17 Feb 2021)

  Changed paths:
    M include/Make/Install.make

  Log Message:
  -----------
  make: Add support for Makefile variable DESTDIR (#1234)

Addresses issues https://trac.osgeo.org/grass/ticket/764 and
https://trac.osgeo.org/grass/ticket/1839.

DESTDIR is commonly used in package creation, see:
https://www.gnu.org/prep/standards/html_node/DESTDIR.html

This is a modification of https://github.com/macports/macports-ports/blob/4e2a26e42de94067ac78b3f26dbb54d5931158e0/gis/grass7/files/patch-Install_make.diff
originally created by @Veence.

Creates DESTDIR directory if needed.