Re: I managed to build guix natively on Debian GNU/Hurd , what's next?

[Svante Signell]

On Sat, 2019-08-31 at 00:17 +0200, Ricardo Wurmus wrote:
> Svante Signell <address@hidden> writes:
> 
> > On Fri, 2019-08-30 at 23:30 +0200, Ricardo Wurmus wrote:
> > > Svante Signell <address@hidden> writes:
> > > 
> > > > Where to install the bootstrap-binaries: Natively in GNU/Hurd, which
> > > > already
> > > > hase.g. /bin/tar from the tar package or within Guix on amd64? But
> > > > installing
> > > > tar to /bin does not find that file, even with setting PATH??
> > > 
> > > That’s expected.  Guix will not use arbitrary binaries that happen to be
> > > on PATH.  That’s by design.  The bootstrap binaries are at the roots of
> > > the package graph – changes to them would result in the complete graph
> > > to be rebuilt from scratch.
> > 
> > Sorry but the tarballs have files like ./bin/tar Where to unpack them, on
> > the
> > native Hurd image or the guix one?
> 
> The generated archives are to be placed in the Guix source tree under
> gnu/packages/bootstrap/…/.

Here:
/gnu/store/2b48z82a5bjfkcqhr8d80zq1agiglyx8-guix-1ec29df/gnu/packages/bootstrap 

or here:
/usr/share/guile/site/2.2/gnu/packages/bootstrap/

I assume the first is correct.

> > How is that cross-build done? Within the Linux guix image or a Linux amd64
> > image? And cross package build order?
> 
> The order doesn’t matter, because in Guix the order is fixed anyway.
> You just build the bootstrap binaries as a single target on your
> GNU/Linux host and you’ll end up with all the archives you’ll need to
> copy to the Hurd target machine.

I issued guix build --target=i586-pc-gnu bootstrap-tarballs in my GNU/Linux Guix
image (thanks Julien): uname -a
Linux gnu 5.1.2-gnu #1 SMP 1 x86_64 GNU/Linux

Everything looked fine until:
g++   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings 
-Wcast-qual 
-Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-
variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -DGENERATOR_FILE
-static-libstdc++ -static-libgcc  -o build/genattrtab \
    build/genattrtab.o build/rtl.o build/read-rtl.o build/ggc-none.o build/vec.o
build/min-insn-modes.o build/gensupport.o build/print-rtl.o build/read-md.o
build/errors.o ../build-x86_64-unknown-linux-gnu/libiberty/libiberty.a
build/genattrtab ../../gcc-5.5.0/gcc/common.md ../../gcc-
5.5.0/gcc/config/i386/i386.md insn-conditions.md \
        -Atmp-attrtab.c -Dtmp-dfatab.c -Ltmp-latencytab.c
make[2]: *** [Makefile:2156: s-attrtab] Killed
make[2]: Leaving directory '/tmp/guix-build-gcc-cross-sans-libc-i586-pc-gnu-
5.5.0.drv-0/build/gcc'
make[1]: *** [Makefile:4095: all-gcc] Error 2
make[1]: Leaving directory '/tmp/guix-build-gcc-cross-sans-libc-i586-pc-gnu-
5.5.0.drv-0/build'
make: *** [Makefile:853: all] Error 2
Backtrace:
           4 (primitive-load "/gnu/store/745pxg9235s6x3szcxim8xs03fp…")
In ice-9/eval.scm:
   191:35  3 (_ _)
In srfi/srfi-1.scm:
   863:16  2 (every1 #<procedure 761180 at /gnu/store/ihzxrhpzk15qv…> …)
In /gnu/store/ihzxrhpzk15qvz4bjibymj9qniifnxdf-module-import/guix/build/gnu-
build-system.scm:
   799:28  1 (_ _)
In /gnu/store/ihzxrhpzk15qvz4bjibymj9qniifnxdf-module-
import/guix/build/utils.scm:
    616:6  0 (invoke _ . _)
...

which g++
/home/guest/.guix-profile/bin/g++

/home/guest/.guix-profile/bin/g++ --version
g++ (GCC) 9.1.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

What should be modified to build a newer version of gcc?
Any ideas?