[Buildroot] Issue for the integration of Codesourcery external toolchains

[Baruch Siach <baruch@tkos.co.il>]

Hi Lionel,

On Tue, Jan 12, 2010 at 01:56:03PM +0100, Lionel Landwerlin wrote:
> On Tue, Jan 12, 2010 at 1:48 PM, Baruch Siach <baruch@tkos.co.il> wrote:
> > On Tue, Jan 12, 2010 at 11:54:41AM +0100, Thomas Petazzoni wrote:
> > > On Wed, 6 Jan 2010 08:59:53 +0200
> > > Baruch Siach <baruch@tkos.co.il> wrote:
> > >
> > > > >  * Build a more normal sysroot in $(STAGING_DIR) by combining the
> > > > >    contents of armv4t and the header files. But this would require
> > > > >    telling gcc that the libraries aren't in armv4t anymore. This is
> > > > >    probably possible using a custom spec file, but is quite
> > > > >    complicated.
> > > >
> > > > How about generating symlinks in the staging directory:
> > > >
> > > > armv4t/usr/include -> ../../usr/include
> > > > thumb2/usr/include -> ../../usr/include
> > > >
> > > > and then using the output of -print-sysroot for each target?
> > >
> > > Because everything in Buildroot assumes that the libraries and headers
> > > must be installed in $(STAGING_DIR)/usr/include and
> > > $(STAGING_DIR)/usr/lib, not in $(STAGING_DIR)/armv4/usr/include and
> > > $(STAGING_DIR)/armv4/usr/lib.
> >
> > I'll clarify. I suggest the following steps:
> >
> > 1. Copy the entire CodeSourcery sysroot (as reported by -print-sysroot)
> > into
> >   $(STAGING_DIR).
> >
> > 2. Create the following symlinks:
> >
> >    $(STAGING_DIR)/armv4t/usr/include -> ../../usr/include
> >    $(STAGING_DIR)/thumb2/usr/include -> ../../usr/include
> >
> 
> Or just
>        $(STAGING_DIR)/armv4t/ -> $(STAGING_DIR)
> 
> ;)

Probably not. The $(STAGING_DIR)/armv4t directory is a real one containing the 
ARMv4T version of the standard shared libraries in $(STAGING_DIR)/armv4t/lib 
and $(STAGING_DIR)/armv4t/usr/lib.

baruch

> >
> > 3. Set as necessary:
> >
> >    STAGING_DIR=$(STAGING_DIR)/armv4t
> >
> >    or
> >
> >    STAGING_DIR=$(STAGING_DIR)/thumb2
> >
> > Buildroot then sees libraries and headers in $(STAGING_DIR)/usr/lib and
> > $(STAGING_DIR)/usr/include respectively, as expected.
> >
> > baruch

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