Dongsu Park c335e197bd eclass: exclude unnecessary architectures from DTC in Kernel ...

DTC (Device Tree Compiler) source tree in Flatcar Kernel modules
unnecessarily takes too much space, especially the `include-prefixes`
directory.

```
$ sudo du -a /usr/lib64/modules/$(uname -r)/source/ | sort -n -r | head -n5
130100  /usr/lib64/modules/5.8.11-flatcar/source/
69180   /usr/lib64/modules/5.8.11-flatcar/source/include
56324   /usr/lib64/modules/5.8.11-flatcar/source/scripts
51384   /usr/lib64/modules/5.8.11-flatcar/source/scripts/dtc
50728   /usr/lib64/modules/5.8.11-flatcar/source/scripts/dtc/include-prefixes
$ sudo ls /usr/lib64/modules/$(uname -r)/source/scripts/dtc/include-prefixes/
arc  arm  arm64  c6x  dt-bindings  h8300  microblaze  mips  nios2 openrisc  powerpc  sh  xtensa
```

Most of them are for architectures that are not supported by Flatcar, so
we can remove them from the production image.

OTOH, as `dt-bindings` looks more like an architecture-independent one,
for now we keep it.

Before:

```
$ du -s /usr/lib64/modules/$(uname -r)/source/scripts/dtc/
51384   /usr/lib64/modules/5.8.11-flatcar/source/scripts/dtc/
$ du -s /usr/lib64/modules/
250308  /usr/lib64/modules/
$ df /usr
Filesystem      1K-blocks   Used Available Use% Mounted on
/dev/mapper/usr   1007760 934152     21592  98% /usr
```

After:

```
$ du -s /usr/lib64/modules/$(uname -r)/source/scripts/dtc/
6632    /usr/lib64/modules/5.8.11-flatcar/source/scripts/dtc/
$ du -s /usr/lib64/modules/
205144  /usr/lib64/modules/
$ df /usr
Filesystem      1K-blocks   Used Available Use% Mounted on
/dev/mapper/usr   1007760 907628     48116  95% /usr
```

2020-10-06 11:20:11 +02:00

sdk_container/src/third_party/coreos-overlay

eclass: exclude unnecessary architectures from DTC in Kernel

2020-10-06 11:20:11 +02:00

Description

image build and composition scripts for Flatcar Container Linux

flatcarflatcar-linuxhacktoberfestsdk

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