Gunwant Jain <therealgunwant@gmail.com> writes:

> This week, I had relatively less work done.
> I spent most of my time perusing the LFS guide and osdev.org learning
> about building toolchains. Then I went onto building the
> aarch64-linux-android toolchain as described in [1]. I updated the
> kernel sources for my phone [2]. And in general tidied up my kernel
> repository. 

So the newly compile kernel works.  Well done.

> But while building the toolchain, I was not able to compile `gcc` as I
> was riddled with errors along the way. Most of them are related to the
> newer `gcc` (version 9.x) finding incompatibility in the sources of
> the `gcc` I am trying to build (version 4.9).  I will continue to
> build the toolchain and hopefully move onto separating `Bionic` from
> the other side of Android mid-week.

Why do you need to build gcc-4.9?

>
> [1]
> https://wiki.gentoo.org/wiki/Android/SharkBait/Building_a_toolchain_for_aarch64-linux-android

> [2]
> https://github.com/WantGuns/overlay/blob/master/sys-kernel/linux-headers/linux-headers-4.4.222.ebuild

Does the version number "4.4.222" coresspond to the kernel of your
phone?  Generally, when compiling a toolchain, you don't need to match
the linux-header version to the running kernel. The newest linux-header
will do.

Benda