On 04/21/2015 03:18 PM, Jim Wilson wrote:
> On Tue, Apr 21, 2015 at 12:35 PM, Joel (Xi Zhou) Zhou
> <joel.z...@broadcom.com> wrote:
>> The u-boot built with gcc-linaro-arm-none-eabi-4.9-2014.09_linux can boot on
>> the development board. This toolchain was pre-built toolchain from Linaro,
>> built with crosstool-NG. The version is gcc version 4.9.2 20140904
>> (prerelease) (crosstool-NG linaro-1.13.1-4.9-2014.09 - Linaro GCC
>> 4.9-2014.09)
>>
>> With the same u-boot source, the binary built with the Linaro gcc 4.9
>> 2015.04 hang on the same board. The 2nd toolchain was compiled locally on
>> RHEL6, built with ABE tool. We build it locally to avoid “GLIBC_2.14 not
>> found” issue on the pre-built toolchain. The version is gcc version 4.9.3
>> 20150413 (prerelease) (Linaro GCC 2015.04)
> The older toolchain is built with crosstool-NG. The newer one is
> built with ABE. There are likely some subtle differences in behaviour
> between them, and this might be causing the problem. This would not
> be a problem normally, but low level code like bootloaders are more
> sensitive to these kinds of things. Or it could be a latent bug in
> the new release.
There are differences between crosstool-ng built toolchains and ABE
built ones, but they're mostly minor tweaks. Crosstool-ng applies it's
ow patches to get things to build. ABE doesn't do any patching. It's
probably a compiler bug, I just found out our 2015.04 release can't
compile all of Open Embedded, whereas a older release worked fine.
- rob -
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