[Buildroot] [PATCH] Makefile: unset MAKEFLAGS

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Dear Thomas De Schampheleire,

On Thu, 11 Jul 2013 13:36:28 +0200, Thomas De Schampheleire wrote:

> dependencies.sh does not complain on the existence of LD_LIBRARY_PATH
> in the environment, only on the presence of the current working
> directory inside of it. But of course, if we decide to unexport this
> variable, then checking its contents is no longer needed.
> Is there any valid use case for someone setting LD_LIBRARY_PATH during
> a buildroot build?

I guess it could be used if someone is building manually some host
tools needed by Buildroot, and a special LD_LIBRARY_PATH is needed to
run such tools. But it really seems like a corner case.

> For the check on the presence of the current working dir in PATH, we
> could question whether it makes sense to raise a message and exit, or
> to manipulate PATH during the build and continue.

True.

> Another variable checked in dependencies.sh is PERL_MM_OPT. This seems
> a good candidate to add to the existing list in Makefile.

Indeed. I'm the one to blame here, I'm the one who added this variable
check in dependencies.sh, if I remember correctly :)

> Is there any particular reason why some unexports are done always, and
> some are done inside a check on BR2_HAVE_DOT_CONFIG ?

So, PKG_CONFIG_PATH, PKG_CONFIG_SYSROOT_DIR and DESTDIR get unset
outside of the BR2_HAVE_DOT_CONFIG conditional, all the other are
inside. I don't really see why we're doing that.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com