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Date: Mon, 15 Dec 1997 00:43:38 GMT
From: Mark Valentine <mark@thuvia.demon.co.uk>
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Subject: bin/5297: make incompatibility with System V style variable substitions
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>Number:         5297
>Category:       bin
>Synopsis:       make incompatibility with System V style variable substitions
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Dec 14 16:50:01 PST 1997
>Last-Modified:
>Originator:     Mark Valentine
>Organization:
>Release:        FreeBSD 3.0-CURRENT i386
>Environment:

>Description:

	make(1) has an incompatibility with other implementations (such
	as GNU make and Sun's make) when performing System V style variable
	substitions involving empty strings.

>How-To-Repeat:

	Using the following makefile and "make all",

	    FOO = 
	    FOOBAR = $(FOO:=bar)

	    all:
		    @echo FOOBAR = $(FOOBAR)

	GNU make and Sun's make generate the output:

	    FOOBAR = 

	whereas FreeBSD's make produces:

	    FOOBAR = bar

	If FOO is non-empty, FreeBSD does the right thing, e.g.
	with "make all FOO='foo1 foo2'":

	    FOOBAR = foo1bar foo2bar

>Fix:
>Audit-Trail:
>Unformatted: