[yocto] Writing do_install_append for target and virtclass-native in a bbappend

[Richard Purdie]

On Mon, 2012-04-16 at 20:32 -0700, Darren Hart wrote:
> I'm trying to address a symlink naming issue in the bzip2 package when
> used with Chrome. Chrome is looking for a specific soname, which the
> default install of bzip2 doesn't setup. I can address this easily by
> adding the symlink via a bzip2 bbappend in do_install_append().
> Unfortunately, this fails for the virtclass-native variant. I tried
> adding and empty:
> 
> do_install_append_virtclass-native() {
> 	:
> }
> 
> function to the bbappend, which still failed. I then added an echo
> statement which appeared in the output, but it still ran non-native
> do_install_append() and failed. Switching the order of the functions
> made the echo output disappear, but the native variant still failed.
> 
> I figure I must be missing something rather fundamental here. Any ideas
> what it might be?

_append variables stack so if you do:

A_append = "x"
A_append = "y"
A_append = "z"

You'll end up with A = "xyz".

You can do something a little more ugly to work around it like:

do_install_append () {
	${SYMLINK}
}

SYMLINK = "ln -s a b"
SYMLINK_virtclass-native = ":"

Cheers,

Richard