arm64: Add detection code for broken .inst support in binutils
authorMarc Zyngier <marc.zyngier@arm.com>
Tue, 6 Dec 2016 15:27:43 +0000 (15:27 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Tue, 6 Dec 2016 15:54:21 +0000 (15:54 +0000)
commitbbb56c27228d4ad64aca858c5af49d0f2f11c645
treebee9381f7216018593b2a687db02f183b2672c5d
parent49f5522e495aba58feb1ca58123805929710bddd
arm64: Add detection code for broken .inst support in binutils

Binutils version up to (and including) 2.25 have a pathological
behaviour when it comes to mixing .inst directive and arithmetic
involving labels. The assembler complains about non-constant
expressions and compilation stops pretty quickly.

In order to detect this and work around it, let's add a bit of
detection code that will set the CONFIG_BROKEN_GAS_INST option
should a broken gas be detected.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/Makefile