m4/log.m4 contains bashisms

[desrt]

On many systems, #!/bin/sh is not bash.

Meanwhile, autoconf generates its ./configure script with #!/bin/sh at the top and dleyna-core (and -dbus-connector and -renderer) use arrays (which are a bash extension) from the DLEYNA_LOG_LEVEL_CHECK macro in m4/log.m4.

It's possible to work around this issue by calling autogen.sh with the CONFIG_SHELL variable set to the location of bash, but this is suboptimal. It must surely be possible to rewrite this macro in a way such that it doesn't depend on bash.

[jku]

@rsbells or @rasikana please review (if you can, it's m4...)

The _DLEYNA_LOG_LEVEL_CHECK_VALUE macro is pure error checking for --log-level: you can only input 0,7 or 8 as single values or any combination of 1,2,3,4,5 and 6: anything else should result in error.

[rsbells]

I looked at the m4 changes and they looked fine. It looks like you already signed-off on them. Do you need me to do anything else?

[jku]

No, just wanted a second pair of eyes to look at it. Thanks, I'll merge