Re: Build gcc 10.3.0 for avr on a amd64 linux host

[Senthil Kumar]

On Sat, May 22, 2021 at 1:21 AM BERTRAND Joël <joel.bertrand@systella.fr> wrote:
>
>         Hello,
>
>         I'm trying to build a recent gcc to check if my issue comes from
> compiler or not. Thus, I have downloaded gcc 10.3.0 sources. Of course,
> on my debian/testing workstation, I have avr avr-binutils and avr-libc.
>
>         I have configured gcc with :
>
> hilbert:[~/cvs/cross-gcc/build] > ../gcc-10.3.0/configure -v
> --enable-languages=c,c++,fortran --prefix=/home/bertrand/cvs/cross-gcc
> --disable-nls --disable-libssp --target=avr --with-dwarf2
>
> but build process hangs with :
>
> make[3] : on quitte le répertoire
> « /home/bertrand/cvs/cross-gcc/build/avr/libgcc »
> make[2] : on quitte le répertoire
> « /home/bertrand/cvs/cross-gcc/build/avr/libgcc »
> Checking multilib configuration for libbacktrace...
> Configuring in avr/libbacktrace
> configure: loading cache ./config.cache
> checking build system type... x86_64-pc-linux-gnu
> checking host system type... avr-unknown-none
> checking target system type... avr-unknown-none
> checking for avr-gcc... /home/bertrand/cvs/cross-gcc/build/./gcc/xgcc
> -B/home/bertrand/cvs/cross-gcc/build/./gcc/
> -B/home/bertrand/cvs/cross-gcc/avr/bin/
> -B/home/bertrand/cvs/cross-gcc/avr/lib/ -isystem
> /home/bertrand/cvs/cross-gcc/avr/include -isystem
> /home/bertrand/cvs/cross-gcc/avr/sys-include
> checking whether the C compiler works... no
> configure: error: in `/home/bertrand/cvs/cross-gcc/build/avr/libbacktrace':
> configure: error: C compiler cannot create executables
> See `config.log' for more details
> make[1]: *** [Makefile:12412 : configure-target-libbacktrace] Erreur 1
> make[1] : on quitte le répertoire « /home/bertrand/cvs/cross-gcc/build »
> make: *** [Makefile:938 : all] Erreur 2
> hilbert:[~/cvs/cross-gcc/build] >
>
>         Config log contains:
> configure:3078: /home/bertrand/cvs/cross-gcc/build/./gcc/xgcc
> -B/home/bertrand/cvs/cross-gcc/build/./gcc/
> -B/home/bertrand/cvs/cross-gcc/avr/bin/
> -B/home/bertrand/cvs/cross-gcc/avr/lib/ -isystem
> /home/bertrand/cvs/cross-gcc/avr/include -isystem
> /home/bertrand/cvs/cross-gcc/avr/sys-include    -g -O2   conftest.c  >&5
> /usr/bin/avr-ld: cannot find -lm
> /usr/bin/avr-ld: cannot find -lc
> collect2: error: ld returned 1 exit status
> configure:3082: $? = 1
> configure:3120: result: no
> configure: failed program was:
> | /* confdefs.h */
> | #define PACKAGE_NAME "package-unused"
> | #define PACKAGE_TARNAME "libbacktrace"
> | #define PACKAGE_VERSION "version-unused"
> | #define PACKAGE_STRING "package-unused version-unused"
> | #define PACKAGE_BUGREPORT ""
> | #define PACKAGE_URL ""
> | /* end confdefs.h.  */
> |
> | int
> | main ()
> | {
> |
> |   ;
> |   return 0;
> | }
> configure:3125: error: in
> `/home/bertrand/cvs/cross-gcc/build/avr/libbacktrace':
> configure:3127: error: C compiler cannot create executables
> See `config.log' for more details
>
>         OK. xgcc tries to build an avr executable and doesn't find libm and
> libc. But even if I add LDFLAGS on configure command line, make always
> returns this error. I suppose I have done a mistake...

Did you try building and installing avr-libc also at the same --prefix location?

Regards
Senthil

>
>         Any idea to bulid gcc 10.3.0 ?
>
>         Best regards,
>
>         JB
>