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[PATCH] pattern-specific variable expansion

From: Boris Kolpackov
Subject: [PATCH] pattern-specific variable expansion
Date: Fri, 9 Apr 2004 14:01:52 -0500
User-agent: Mutt/1.5.4i

Good day,

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

a := A

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

a := B


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,

Attachment: pattern-specific-expansion.patch
Description: Text document

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