[PATCH v2] binutils/ARC: cleanup

[Thomas Petazzoni]

Hello Vineet,

On Thu, 10 Sep 2020 23:21:43 +0000
Vineet Gupta <Vineet.Gupta1 at synopsys.com> wrote:

> >> -ifeq ($(BINUTILS_VERSION),arc-2019.09-rc1)
> >> +ifeq ($(BR2_BINUTILS_VERSION_ARC),y)  
> 
> Looks like we need this specific thunk anyways. When I select pristine upstream
> binutils (not ARC fork @ github), the above forces it to download from github
> which it should not and will not if the tag/branch has not been mirrored there.

So I guess you're talking about the situation where a host-binutils is
not enabled, and only a target binutils is used. In this case, indeed:

ifeq ($(BINUTILS_VERSION),)
ifeq ($(BR2_arc),y)
BINUTILS_VERSION = arc-2020.03-release
else
BINUTILS_VERSION = 2.33.1
endif
endif # BINUTILS_VERSION

will kick in and set BINUTILS_VERSION to arc-2020.03-release, which
will lead to:

ifeq ($(BINUTILS_VERSION),arc-2020.03-release)
BINUTILS_SITE = $(call github,foss-for-synopsys-dwc-arc-processors,binutils-gdb,$(BINUTILS_VERSION))
BINUTILS_SOURCE = binutils-gdb-$(BINUTILS_VERSION).tar.gz
BINUTILS_FROM_GIT = y
endif

being taken into account.

What happens with target binutils is:

 (1) If a host-binutils is built (because Buildroot is building the
     toolchain), then we're using the same version as the
     host-binutils, which is defined by the choice in
     package/binutils/Config.in.host.

 (2) If not host-binutils is built (because we're using an external
     toolchain), then there is no version selection: we unconditionally
     use 2.33.1, except on ARC where we use the special ARC fork.

So I guess the decision to take is: do we want to switch to using the
upstream binutils, even for ARC, when no host-binutils is built ?

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com