[PATCH] pattern-specific variable expansion

[Boris Kolpackov]

Good day,

The following makefile prints 'B' instead of 'A'.

a := A

%bar : arg := $a
%bar : ; @echo $(arg)

a := B

foobar:

Patch is attached for those who find this behavior surprising.

Also note that this patch does not address the following cases:


%bar : a := a
%bar : $a_b := a_b  # doesn't work, equivalent to _b := a_b
                    
%bar : a := a
%bar : a_b := $a_b  # doesn't work, equivalent to a_b := _b

comments are welcome,
-boris

pattern-specific-expansion.patch
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