[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: include files with :=
From: |
Paul D. Smith |
Subject: |
Re: include files with := |
Date: |
Wed, 15 Dec 2004 11:27:29 -0500 |
%% Noel Yap <address@hidden> writes:
dj> my_var:=$(shell script)
ny> File open/close is a very expensive operation. If you're
ny> including many makefiles, this may be where your lag is coming
ny> from.
File open/close is a trivial operation compared to invoking a shell,
though! :-)
ny> Also, whenever you include a makefile, there's a chance that make
ny> will re-exec although the details aren't coming to me right now.
If (a) make can find a rule that will build the included makefile, and
(b) that rule shows the included makefile is out of date, then make will
rebuild the included makefile and re-exec.
--
-------------------------------------------------------------------------------
Paul D. Smith <address@hidden> Find some GNU make tips at:
http://www.gnu.org http://make.paulandlesley.org
"Please remain calm...I may be mad, but I am a professional." --Mad Scientist