phobos and sysroots

[Johannes Pfau]

Am Sun, 12 May 2013 15:38:46 +0100
schrieb Iain Buclaw <ibuclaw at ubuntu.com>:

> On 12 May 2013 14:23, Johannes Pfau <nospam at example.com> wrote:
> 
> > I noticed that we do not have any sysroot handling in gdc yet.
> >
> > If gcc is build with --with-sysroot=SYSROOT certain libraries &
> > headers are not installed in PREFIX/lib but in SYSROOT/lib. At
> > runtime it is then possible to use the --sysroot=NEWPATH switch and
> > the compiler will then look for includes & library files in
> > NEWPATH/ instead of in SYSROOT/. This is often used for cross
> > compilers so you can have one compiler targeting different systems
> > (for example with different libc versions) by using different
> > sysroots.
> >
> > The question here is mainly whether we want phobos & druntime to be
> > installed in the sysroot or whether we should treat them as
> > belonging to the compiler and always use the same, shipped
> > libphobos, even if the --sysroot switch is used.
> >
> > Right now we have some weird hybrid form: The libraries are in the
> > sysroot (x86_64-gdcproject-linux-gnu/sysroot/lib) but the includes
> > are not
> >
> > (x86_64-gdcproject-linux-gnu/lib/gcc/x86_64-gdcproject-linux-gnu/4.7.2/include/d2)
> >
> 
> I think there's nothing wrong with the rationale, they're shipped
> with the compiler, so they belong to the compiler.
> 
> Another missing configure switch is: --with-gdc-include-dir
> 
> Also need to remove the logic in Make-lang.in that decides on where
> phobos/druntime will be.  It should all be configured.
> 

OK, then we don't have to do anything special for sysroot support as
long as we don't have default system includes (like gcc always looks
for C headers in {SYSROOT}?/usr/include and
{SYSROOT}?/usr/local/include).