[llvm-dev] unable to compile llvm with gcc 4.7.4

[Daniel Berlin via llvm-dev]

On Mon, Oct 17, 2016 at 1:41 PM, Renato Golin <renato.golin at linaro.org>
wrote:

> On 17 October 2016 at 19:44, Daniel Berlin <dberlin at dberlin.org> wrote:
> > First stage of gcc is the entire compiler, not a subset or a different
> > compoiler.
>
> I didn't mean a different compiler, just not a full "toolchain".
>

Ah.
You said "GCC has a reduced sub-set of the compiler that works with many old
compiler".

This is the part i meant is not correct anymore. It does not have a reduced
subset.
This was kind of true at one point.  It used to be that the C compiler even
worked with K&R through conversion.
Nowadays, even this has fallen by the wayside.

>
> As far as my knowledge of Linaro's process goes, stage 1 uses the
> system libraries and tools (could be cross), and they use the stage 1
> to build the intended versions of the libraries and tools (stage
> 1.5?),


Yes.


> and use that "incomplete" build + new libraries and tools to
> build stage 2.


I wouldn't call it "incomplete". In most cases, it includes all compilers
and languages and libraries :)

> Stage 3 should be identical, for verification
> processes.
>
Yes.


>
> The difference with LLVM is that we don't build the libraries with
> stage 1's Clang, but the system compiler/tools/libraries as well,
> making it a simple 2-stage build, as opposed to a 2.5 stage build.
> When it comes to the C libraries, we don't even build them at all, and
> use the system libraries even on stage 2.
>
> cheers,
> --renato
>
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