[OE-core] How to export variable in bitbake build for MPICH

[Victor Rodriguez]

HI MPICH build is facing a problem due to the fact that the configure has a
variable call BASH_SHELL the which set the bash shell of the developer
computer. However if the developer has /usr/bin/bash  the configure set
this for the rest of compilation ( you can check this in config.log). Due
to the fact that Yocto just has /bin/bash the build of any image that
includes mpich fails.

ERROR: Unable to install packages. Command
'/home/vrodri3/poky/build/tmp/sysroots/x86_64-linux/usr/bin/smart --quiet
--data-dir=/home/vrodri3/poky/build/tmp/work/qemux86-poky-linux/core-image-minimal/1.0-r0/rootfs/var/lib/smart
install -y mpich at i586 gcc at i586 run-postinsts at all
packagegroup-core-boot at qemux86 bash at i586' returned 1:
error: Can't install mpich-3.1.1-r0 at i586: no package provides /usr/bin/bash


I tested on the mpich src and the problem is fixed with a simple :

export BASH_SHELL=/bin/bash

( configure does not have an option for this )

I have 2 points :

1) When I do the same export and then bitbake os-core-image-minimal the
build still fails , Why is that happening?

2) What is the best way to fix this ? How can I set the environment
variable on the recipe ? Should I patch the Configure ?

Thanks a lot and regards

Victor Rodriguez
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