Re: Multiple expansion works in rules, but not in actions

[Greg Chicares]

On 2007-10-29 17:00Z, Alexander Kriegisch wrote:
> 
> FOO:=bla
> 
> $(FOO):
>       @echo "## $(FOO) ##"
> 
> FOO:=
> 
> The target name $(FOO) is expanded to "bla", but $(FOO) is expanded to
> nothing inside the action. I studied the manual of GNU make 3.81, but
> found no explanation for this effect. Can you point me to the section I
> should read in order to unserstand how changing values affect actions?

This section may help, especially the "Rule Definition" part
at the bottom:

http://www.gnu.org/software/make/manual/html_node/Reading-Makefiles.html#Reading-Makefiles

but probably a more useful answer is to suggest

$(FOO):
        @echo "## $@ ##"

which does what I suspect you want.