Our make currently "misbehaves" and doesn't treat this as a problem.
A=a
a:
echo ${A
there are several possibilities.
1/ do like gmake and treat this as an actual error.
2/ keep the status quo
3/ do something else: if it's not a complete variable reference, then it
should be seen as a string
2/ is error-prone.
1/ is easy to implement
3/ is a bit more complex but probably more compatible with lots of stuff.
Opinions ? examples of Makefiles where something similar would actually
be used ?
