Re: exported vs command line variables

[Philip Guenther]

On Fri, Sep 23, 2016 at 4:09 PM, David Boyce <address@hidden> wrote:
> In that case there does seem to be at least one bug here. In reference to
> the sentence:
>
> "Macros defined by the MAKEFLAGS environment variable and macros defined in
> the makefile(s) shall not be added to the environment of make if they are
> not already in its environment."
>
> And building on Eddy Welbourne's example:
>
> % cat Makefile
> WURGLE = 11
> MAKEFLAGS = WURGLE=$(WURGLE)

You need to read all the applicable bits in the standard before
calling behavior incorrect.  In particular, the Macros section has
this line earlier in it:
        The result of setting MAKEFLAGS in the Makefile is unspecified.

So if you want POSIX-like behavior, don't do that; if you do that,
you're at the whims of GNU make's choices.


Philip Guenther