Bootstrap Builds about sw

[egorpugin]

Hi!

Yes, sure.
Just removed "bootstrap" way of building with cppan (sw v1) from readme today.
a1485d5
(And cppan may be build with cmake. Full chain was make -> cmake -> cppan -> sw.)

SW already has makefile generator as well as ninja one
https://github.com/SoftwareNetwork/sw/blob/master/src/driver/cpp/generator/generator.cpp#L2354
https://github.com/SoftwareNetwork/sw/blob/master/src/driver/cpp/generator/generator.h#L20
(implementations may be just a little bit outdated - not sure 100%)

But here comes interesting question, because sw needs its dependencies downloaded from the network storage. I thought about writing simple script or better implementing it also as part of makefile.
Last step would be running non-sw configure steps (configure files, perform checks etc.).
All this is not so trivial.

Instead it is possible to keep minimal bootstrapped storage (like initrd or initramfs in linux) somewhere on the web which will be downloaded by bootstrap makefile, unpacked and then participate in fresh build.

If you'd like to contribute, I appreciate.
Otherwise this item is not on top of todo currently, sorry.

@egorpugin that's totally fine, I'm willing to patch. I'll read more into it in a shortly.

[egorpugin]

Also this features is needed when porting, for example, to other linux distros.
For example, I've built linux sw on ubuntu 18.04 and cannot run it on 16.04 because of older libc.

I implemented such bootstrap procedure for cppan & cmake some time ago.

[egorpugin]

I have some theoretical progress (couple of ideas) on this.
But still it's for later time.

Awesome! I'll be waiting to see what comes of it

[egorpugin]

Added in 994bb80

To provide a bootstrap build for you, please, provide your OS & ver.