[ccache] [PATCH]: test: export SHELL from Makefile

[Joel Rosdahl]

Hi Eric,

I get the following test failure when 'SHELL' is not defined in the
> environment [...]
> SHELL is exported by 'configure', so we can easily export its value when
> running
> test/main. The attached patch does just this. I hope you can consider
> applying it.


Thanks for the patch!

The subst_env_in_string test only needs any arbitrary environment variable
to play with, so I suggest making the test set up its own environment
instead of relying on an external variable being set. I made it so in
14ea3b69801213eee7aaa0a64f7d0144d23f58a1
<https://git.samba.org/?p=ccache.git;a=commit;h=14ea3b69801213eee7aaa0a64f7d0144d23f58a1>.
Are you OK with that approach?

-- Joel