[yocto] Libgfortran 6.2 doesn't compile

[david bensoussan]

Hello,
I am trying to compile libgfortran 6.2 on Yocto (Morty version) but can't.

    DEBUG: SITE files ['endian-little', 'bit-32', 'ix86-common',
'common-linux', 'common-glibc', 'i586-linux', 'common']
    DEBUG: Executing shell function do_compile
    NOTE: make -j 8
MULTIBUILDTOP=/var/www/toaster/openembedded-core/build-toaster-2/tmp-glibc/work/i586-oe-linux/libgf$
    /bin/bash
../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/mk-sik-inc.sh
'i586-oe-linux-gfort$
    /bin/bash
../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/mk-srk-inc.sh
'i586-oe-linux-gfort$
    /bin/bash
../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/mk-kinds-h.sh
'i586-oe-linux-gfort$
    grep '^#' <
../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/c99_protos.h
> c99_protos.inc
    cp
../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/config/fpu-387.h
fpu-target.h
    grep '^#define GFC_FPE_' <
../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/../gcc/fortran/li$
    grep '^#define GFC_FPE_' <
../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/libgfortran.h
>> $
    grep '^#' < kinds.h > kinds.inc
    make  all-am
    make[1]: Entering directory
`/var/www/toaster/openembedded-core/build-toaster-2/tmp-glibc/work/i586-oe-linux/libgfo$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    /bin/bash ./libtool  --tag=CC   --mode=compile i586-oe-linux-gcc  -m32
-march=i586 --sysroot=/var/www/toaster/opene$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$
    libtool: compile:  i586-oe-linux-gcc -m32 -march=i586
--sysroot=/var/www/toaster/openembedded-core/build-toaster-2/$

../../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgfortran/runtime/backtrace.c:37:33:
fatal error: back$
     #include "backtrace-supported.h"
                                     ^
    compilation terminated.
    make[1]: *** [backtrace.lo] Error 1
    make[1]: *** Waiting for unfinished jobs....

I have default yocto configuration, I simply added:

    FORTRAN_forcevariable = ",fortran"

to enable it.

Am I doing something wrong or is it unstable?
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