Should make consider the prerequisite newer than target in case when
the file mod time for the prerequisite and the target are identical?
We have make file that uses 'cp -p' command to preserve file mod time.
The following is a simplified version of the makefile that illustrates
the problem:
> uname -a
SunOS cns-build2 5.6 Generic_105181-16 sun4u sparc
> make -v
GNU Make version 3.79.1, by Richard Stallman and Roland McGrath.
Built for sparc-sun-solaris2.6
Copyright (C) 1988, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Report bugs to <[EMAIL PROTECTED]>.
> cd /tmp
> touch bar
> cat > Makefile
foo: bar
cp -p bar foo
> make
cp -p bar foo
> make <== why it rebuild?
cp -p bar foo
> /usr/ccs/bin/make <== Sun's make thinks differently
`foo' is up to date.
Which make behavior is the 'appropriate' behavior? IMHO the Sun make
behaves the way most useful for the users. Should this be filed as a
bug against GNU make, or a feature?
Thanks in advance..
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