Re: unable to cross compile for target avr

[Jonathan Wakely <jwakely.gcc@xxxxxxxxx>]

On Fri, 15 Mar 2019 at 19:32, Klaus Rudolph <lts-rudolph@xxxxxx> wrote:
>
> I try to get a avr toolchain up and running.
>
> I have the following Makefile
>
> GCC_VER=8.3.0
> PRE_PREFIX=/opt
> LINUX=linux-gnu
> AVR=avr
>
> unpack:
>      mkdir unpack
>      ( cd unpack; \
>          tar xf ../mpc* ;\
>          tar xf ../mpfr* ; \
>          tar xf ../gmp* ; \
>          tar xf ../gcc* ; \
>          tar xf ../binutils* ; \
>          cd gcc* ;\
>          mv ../mpc* ./mpc ;\
>          mv ../mpfr* ./mpfr ; \
>          mv ../gmp* ./gmp ; \
>          )
>
>
>
> avrbinutils:
>      ( cd unpack/binutils* ; \
>          mkdir build_binutils_avr ; \
>          cd build_binutils_avr ; \
>          ../configure --prefix=$(PRE_PREFIX)/$(AVR)_$(GCC_VER)
> --target=avr --disable-nls --enable-gold --enable-plugins; \
>          make -j8 ; \
>          sudo make install \
>          )
>
> avrgcc:
>      ( cd unpack/gcc* ; \
>          mkdir build_gccavr; \
>          cd build_gccavr ; \
>          ../configure --prefix=$(PRE_PREFIX)/$(AVR)_$(GCC_VER)
> --target=avr --enable-languages=c,c++ --enable-lto --disable-nls
> --disable-libssp; \
>          make  ; \
>          )
>
> So I do:
> make unpack
> make avrbinutils
> make avrgcc
>
> During compiling gcc for target avr I got:
>
> make[3]: Entering directory
> '/home/krud/git_my_checkout/first/own_components/gcc_install/unpack/gcc-8.3.0/build_gccavr/gcc'
> TARGET_CPU_DEFAULT="" \
> HEADERS="auto-host.h ansidecl.h" DEFINES="" \
> /bin/sh ../../gcc/mkconfig.sh config.h
> TARGET_CPU_DEFAULT="" \
> HEADERS="options.h insn-constants.h config/elfos.h config/avr/elf.h
> config/avr/avr-arch.h config/avr/avr.h config/avr/specs.h
> config/dbxelf.h config/avr/avr-stdint.h config/avr/avrlibc.h
> config/initfini-array.h defaults.h" DEFINES="LIBC_GLIBC=1 LIBC_UCLIBC=2
> LIBC_BIONIC=3 LIBC_MUSL=4 WITH_AVRLIBC" \
> /bin/sh ../../gcc/mkconfig.sh tm.h
> TARGET_CPU_DEFAULT="" \
> HEADERS="config/avr/avr-protos.h tm-preds.h" DEFINES="" \
> /bin/sh ../../gcc/mkconfig.sh tm_p.h
> TARGET_CPU_DEFAULT="" \
> HEADERS="auto-host.h ansidecl.h" DEFINES="" \
> /bin/sh ../../gcc/mkconfig.sh bconfig.h
> g++ -c   -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 -fno-PIE -I.
> -Ibuild -I../../gcc -I../../gcc/build -I../../gcc/../include
> -I../../gcc/../libcpp/include  \
>         -o build/genmodes.o ../../gcc/genmodes.c
> /opt/avr_8.3.0/avr/bin/as: unrecognized option '--64'
> make[3]: *** [Makefile:2669: build/genmodes.o] Error 1
> make[3]: Leaving directory
> '/home/krud/git_my_checkout/first/own_components/gcc_install/unpack/gcc-8.3.0/build_gccavr/gcc'
> make[2]: *** [Makefile:4254: all-gcc] Error 2
> make[2]: Leaving directory
> '/home/krud/git_my_checkout/first/own_components/gcc_install/unpack/gcc-8.3.0/build_gccavr'
> make[1]: *** [Makefile:889: all] Error 2
> make[1]: Leaving directory
> '/home/krud/git_my_checkout/first/own_components/gcc_install/unpack/gcc-8.3.0/build_gccavr'
> make: *** [Makefile.gcc8.3.0:65: avrgcc] Error 2
>
> Looks very crazy, because it calls g++ from host and got an error from
> avr-as if I did not interpret the things wrong here.

Check the output of 'env' -- is /opt/avr_8.3.0/avr/bin in your PATH?
Do you have any variables like AS_FOR_BUILD set?