[yocto] libgfortran or cross compiling a fortran application

[Matthias Schöpfer]

Hi there,

I am trying to cross compile a fortran library (lapack), which fails
because it cannot find libgfortran.

So I am trying to build libgfortran. I added:

FORTRAN_forcevariable = ",fortran"

to enable support for fortran cross compile in local conf. Anyhow,
bitbake libgfortran still fails:

| /bin/sh ./libtool  --tag=CC   --mode=compile x86_64-idp-linux-gcc
-m64 -march=core2 -mtune=core2 -msse3 -mfpmath=sse
--sysroot=/home/mschoepf/identpro/yocto/ros-devel/tmp/work/core2-64-idp-linux/libgfortran/7.2.0-r0/recipe-sysroot
-DHAVE_CONFIG_H -I.
-I../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran
 -iquote../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran/io -I../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran/../gcc -I../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran/../gcc/config  -I/home/mschoepf/identpro/yocto/ros-devel/tmp/work/core2-64-idp-linux/libgfortran/7.2.0-r0/gcc-7.2.0/build.x86_64-idp-linux.x86_64-idp-linux/x86_64-idp-linux/libgfortran/../.././gcc -I../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran/../libgcc -I/home/mschoepf/identpro/yocto/ros-devel/tmp/work/core2-64-idp-linux/libgfortran/7.2.0-r0/gcc-7.2.0/build.x86_64-idp-linux.x86_64-idp-linux/x86_64-idp-linux/libgfortran/../libgcc -I../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran/../libbacktrace -I/home/mschoepf/identpro/yocto/ros-devel/tmp/work/core2-64-idp-linux/libgfortran/7.2.0-r0/gcc-7.2.0/build.x86_64-idp-linux.x86_64-idp-linux/x86_64-idp-linux/libgfortran/../libbacktrace -I../libbacktrace  -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings -Werror=implicit-function-declaration -Werror=vla -fcx-fortran-rules -ffunction-sections -fdata-sections   -std=gnu11  -O2 -pipe -g -feliminate-unused-debug-types -fdebug-prefix-map=/home/mschoepf/identpro/yocto/ros-devel/tmp/work/core2-64-idp-linux/libgfortran/7.2.0-r0=/usr/src/debug/libgfortran/7.2.0-r0 -fdebug-prefix-map=/home/mschoepf/identpro/yocto/ros-devel/tmp/work/core2-64-idp-linux/libgfortran/7.2.0-r0/recipe-sysroot-native= -fdebug-prefix-map=/home/mschoepf/identpro/yocto/ros-devel/tmp/work/core2-64-idp-linux/libgfortran/7.2.0-r0/recipe-sysroot=  -Wunknown-pragmas -c -o main.lo `test -f 'runtime/main.c' || echo '../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran/'`runtime/main.c
|
../../../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/libgfortran/runtime/backtrace.c:36:10:
fatal error: backtrace-supported.h: No such file or directory
|  #include "backtrace-supported.h"
|           ^~~~~~~~~~~~~~~~~~~~~~~
| compilation terminated.

Any help, hints and wild guesses are welcome.

Regards,

	Matthias

-- 
Dr.-Ing. Matthias Schöpfer

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