On Mon, 2013-10-21 at 04:05 +0100, Ken Moffat wrote:
> With GNU Make 4.0 on x86_64-unknown-linux-gnu I am unable to build
> qemu 1.6.{0,1} because it fails with
> AR libfdt/libfdt.a
> ar: two different operation options specified
> Makefile:234: recipe for target 'libfdt/libfdt.a' failed
>
> If I try to build it with make V=1 the output shows it has
> ARFLAGS=""
>
> It builds if I export ARFLAGS="rv". If I have understood
> the reply on the qemu-devel list correctly, qemu deliberately passes
> empty ARFLAGS and relies on the following in 'info make' :
> `ARFLAGS'
> Flags to give the archive-maintaining program; default `rv'.
There must be something else going on in your makefile. The built-in
value for ARFLAGS is still present; you can see it set:
$ make -p -f /dev/null | grep ARFLAGS
make: *** No targets. Stop.
ARFLAGS = rv
$(AR) $(ARFLAGS) $@ $<
Something in your makefile is overriding this value.
Perhaps you are setting MAKEFLAGS to add the -R flag (which disables
built-in variables)? Or, you're overriding it somehow.
If you run:
$ make -p -n
and search the output for ARFLAGS, the comment before should tell you
where that variable is being assigned.
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