[PATCH] parisc: dont unconditionally override CROSS_COMPILE for 64 bit.

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Using the 64 bit toolchains from kernel.org[1], one finds that
you can't build the a500_defconfig, because the Makefile will
stomp whatever value you have in your env. for CROSS_COMPILE.

This shows up since the kernel.org toolchains for parisc-64
do not have the "-gnu" prefix, and so you run into it always
saying hppa64-linux-gnu-gcc not found, regardless of the fact
you've not got "-gnu" put anywhere into CROSS_COMPILE.

[1] ftp://ftp.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.5.2/

Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>

diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 55cca1d..cefff6d 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -31,7 +31,9 @@ ifdef CONFIG_64BIT
 UTS_MACHINE	:= parisc64
 CHECKFLAGS	+= -D__LP64__=1 -m64
 WIDTH		:= 64
-CROSS_COMPILE	:= hppa64-linux-gnu-
+ifndef CROSS_COMPILE
+ CROSS_COMPILE	:= hppa64-linux-gnu-
+endif
 else # 32-bit
 WIDTH		:=
 endif
-- 
1.7.9.1

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