- [Breaking change!]
Require the user to pass '-R' to make(1). This is necessary to be
able to do the following change. When GNU make(1) releases a new
version, it will not be necessary to pass -R, but in current
versions of make(1) it is necessary.
- [Breaking change!]
Use '?=' assignments instead of ':=', to support setting make(1)
variables in the environment. Now one can do this:
$ export prefix=/usr
$ make -R
$ sudo make install -R
(The -R is only necessary in GNU make(1) versions prior to the
yet-unreleased 4.5.)
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