[Buildroot] Altera SoC Buildroot external toolchain incompatible error

[lemonoje <lemonoje@gmail.com>]

Hello,

I have been trying to find an answer for this error and I found something
close posted here, but I don't understand fully the problem/solution.  I am
building a Linux system for my Altera Arria 10 SoC Cortex-A9.  I'm new to
Buildroot, and building Linux in general, so I have been pretty closely
following the instructions on Rocketboards.org (except now I am trying to
get newer versions of buildroot and gcc toolchain).

More spcifically for my question I am on part 9. (Building rootfs) in this
guide:  
https://rocketboards.org/foswiki/Documentation/EmbeddedLinuxBeginnerSGuide
<https://rocketboards.org/foswiki/Documentation/EmbeddedLinuxBeginnerSGuide>  

When I try to make buildroot I am selecting an external toolchain
(pre-downloaded from releases.linaro.org), and configuring accordingly.  I
then run  

*make -C buildroot ARCH=ARM BR2_TOOLCHAIN_EXTERNAL_PATH=$TOOLCHAIN all*

and I get the error:
>>> toolchain-external  Configuring
/sf/ArriaX/ltsi_4_1_33/gcc-linaro-5.4.1-2017.01-x86_64_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld:
error: /sf/ArriaX/ltsi_4_1_33/buildroot/output/build/.br-toolchain-test.tmp
uses VFP register arguments, /tmp/ccbU9FJ0.o does not
/sf/ArriaX/ltsi_4_1_33/gcc-linaro-5.4.1-2017.01-x86_64_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld:
failed to merge target specific data of file /tmp/ccbU9FJ0.o
collect2: error: ld returned 1 exit status
Incorrect ABI setting: EABI selected, but toolchain is incompatible
package/pkg-generic.mk:206: recipe for target
'/sf/ArriaX/ltsi_4_1_33/buildroot/output/build/toolchain-external/.stamp_configured'
failed
make: ***
[/sf/ArriaX/ltsi_4_1_33/buildroot/output/build/toolchain-external/.stamp_configured]
Error 1
make: Leaving directory '/sf/ArriaX/ltsi_4_1_33/buildroot'


Thanks in advance for any help!!



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