Building without bootstrapping

[Brooks Moses]

Kai Ruottu wrote:
> Paul Brook wrote:
>>> How can I get the build scripts to use the precompiled gcc throughout
>>> the build process ?
>>>     
>> Short answer is you can't. The newly build gcc is always used to build the 
>> target libraries.
>>   
>  Nice statement but what does this really mean?
> 
>  Does this for instance mean that: "The newly build gcc is always used 
> to build the
> target C libraries ?  A native GCC builder now expecting those 
> '/usr/lib/*crt*.o'
> startups, '/lib/libc.so.6', '/lib/ld-linux.so.2', '/usr/libc.a' etc. 
> "target libraries" being
> rebuilt with the new "better" GCC  to be "smaller and quicker" ?

No, it doesn't.  In this case, "target libraries" only means the runtime 
library files that are part of the GCC distribution, in their form 
that's intended for execution on the target computer -- things like 
libgcc, libgfortran, and so forth.  It does not mean the 
compiler-independent library files that you're thinking of.

The reason for this is that things like libgcc and libgfortran are 
effectively "part of" the compiler.  Calls to things in these libraries 
are almost always inserted by the compiler, not directly by the 
programmer, and they are specific to the particular compiler that's in 
use and can even change from version to version of the same compiler.

- Brooks