On Thu, Apr 22, 2010 at 09:23:28AM +0200, Jonas Bonn wrote:
> In the toplevel Linux Makefile, INSTALL_HDR_PATH is hardcoded as
> follows:
>
> # Kernel headers
>
> #Default location for installed headers
> export INSTALL_HDR_PATH = $(objtree)/usr
>
> Should this not be done with ?= so that the install path can be
> overridden on the command line?
>
> export INSTALL_HDR_PATH ?= $(objtree)/usr
What you can do today is:
make INSTALL_HDR_PATH=/my/dir
Difference between "=" and "?=" is that the latter
only assign a new value if the variables was not defined.
Sam
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