Re: Build without libgloss?

[Werner Tuchan <32768 at gmx dot net>]

> Are you using cygwin with David Knuth's patch to the gcc source
> and what configure options did you use?
The only patch I've applied is undoing the effects of a quick hack that 
makes eh_frame info cluttering the data section with __global__.F chunks 
on elf targets. This is for 2.95.3 only. What does David's patch do?

I'm useing this environment:
export TARGET=m68k-elf
export PREFIX=/usr/m68k-elf
export PATH=$PREFIX/bin:$PATH

This configuration for the first pass:
../gcc-3.2/configure --target=$TARGET --prefix=$PREFIX --without-headers 
--with-newlib --with-gnu-as --with-gnu-ld --enable-languages=c,c++

And this for the second pass:
../gcc-3.2/configure --target=$TARGET --prefix=$PREFIX --with-gnu-as 
--with-gnu-ld --enable-languages=c,c++

Or this for the single pass build:
../gcc-3.2/configure --target=$TARGET --prefix=$PREFIX --with-newlib 
--with-gnu-as --with-gnu-ld --enable-languages=c,c++

> It seems to work 'better' with /cygdrive/c instead of c:
> On one attempt the first pass install tried to use /c:/ and failed (another
> one for the FAQ).
Gcc doesn't like windows file names at all.

> Something I read seemed to suggest the C library, be it newlib or glibc
> should always be built as part of the gcc tree.  What is the current
> received
> wisdom on this?
Both should work. As newlib is distributed as a seperate package it can 
be build as such. There are claims that the compiler might not work 
correctly if it doesn't see the target headers during configuration but 
I have seen no evidence of this. At least if you install and 
reconfigurate the compiler over this issue should be solved.

> I'm obvious doing something wrong.  Maybe someone could enlighten me with
> some answers
> to the following (admittedly most of which should be RTFM or STFW items).  I
> have a least partial answers but independent verificat
> ion would be nice.
>
> How can I test my binutils are actually working?  
> I've tried make check but I'm not sure if this is valid as I don't have
> deja-gnu installed.
When in doubt try a different version. I have 2.12.1 right now.

> Why are --with-gnu-as & --with-gnu-ld necessary?
Some host systems have their own assembler & linker with different 
properties than gnu as & ld. By default the configuration script assumes 
that they'd be used. Cygwin is not one of those so it doesn't make a 
difference.

> Which as and ld is it after and where will it look for them?
You need to have $PREFIX/bin before cygwin/bin in your PATH. Otherwise 
cygwin's native gcc may be invoked for compiling the target libraries 
indeed.

> Which headers does --without-headers refer to? what is the relationship of
> these
> headers to the newlib ones?
--without-headers referes to the target C library headers. For embedded 
cross targets they are ususally installed with newlib. The point is that 
you need to have a cross compiler first to compile newlib so you need to 
tell the build process that you are going to produce a minimal cross 
compiler without the need of target headers.












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