Quoth Philip Hazel on Thu, Nov 12, 1998:
> > PERL_CC != perl5 -MConfig -e 'print $$Config{cc}'
>
> No idea! I copied exactly what Malcolm Beattie sent me, being scared to
> tamper with such deep Black Magic. :-)
Here are the versions of make I used:
BSD make: make(1) on BSDI 4.0 (based on pmake), must be
more or less the same as these of other
4.4BSD-based systems.
gmake: version 3.76.
Solaris make: make(1) on Solaris 5.6 for i386, used in hope
that it is the standard SysV make.
Here's what happens:
PERL_CC != perl5 -MConfig -e 'print $$Config{cc}'
works with BSD make, doesn't work with gmake. Solaris make
shouts at me.
PERL_CC = $(shell perl5 -MConfig -e 'print $$Config{cc}')
works with gmake, doesn't work with BSD make. Solaris make gives
empty variable (maybe because it thinks that shell... is just a
very long variable name).
PERL_CC = `perl5 -MConfig -e 'print $$Config{cc}'`
works with BSD make, gmake, and Solaris make, but re-evaluates the
expression every time the variable is referenced, so the command
like:
all:
echo ${PERL_CC}
gives you the following output:
echo `perl5 -MConfig -e 'print $Config{cc}'`
gcc
(the first line is the command itself, the second is the output).
And I don't even want to touch IRIX to check what happens there.
Vadik.
--
It was state of the art, he said.
The art in this case was probably pottery.
-- Terry Pratchett and Neil Gaiman, "Good Omens"
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