From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 19 Feb 2015 12:47:20 +0000 (+0100)
Subject: MIPS: Makefile: Pass -march option on Loongson3A cores
X-Git-Tag: fixes-v4.0-rc1~21^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a8140f36af2a8b63fd507bd8c1fa00df7819e0de;p=pandora-kernel.git

MIPS: Makefile: Pass -march option on Loongson3A cores

The loongson 3A cores do not select a suitable -march option so the build
system uses the default one from the toolchain. This may or may not be
suitable for a loongson 3A build. In order to avoid that, we explicitly set
a suitable -march option for that core.  Furthermore, some very old
compilers don't support -march= at all and there is the possibility of
toolchain combinations such as GCC 4.9 and binutils 2.24 for which
-march=loongson3a will result in MIPS64 R2 code being generated but then
rejected by GAS.  So treat the Longsoon 3A as an R2 CPU.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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