Findutils failure due to reliance /bin/echo

[Ludovic Courtès]

Hi James,

Hydra Build Daemon <address@hidden> writes:

> FAIL: l1, unexpected failure, child process exited abnormally, 
> /tmp/nix-build-iqdrm25mpg40iivc59hjmdjjay1rfifp-findutils-4.5.10-git.drv-0/findutils-4.5.10-git/xargs/testsuite/../xargs:
>  /bin/echo: No such file or directory

This is due to the fact that there’s no /bin/echo in the build
environment (actually /bin on NixOS contains only /bin/sh).

If you want to rely on ‘echo’ other than the shell’s built-in, you
should use AC_PATH_PROG([echo]) in ‘configure.ac’ or something similar.
(Though I can’t think of any reason why the shell built-in wouldn’t
work.)

Thanks,
Ludo’.