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Re: HOWTO debug makefiles?
From: |
Paul D. Smith |
Subject: |
Re: HOWTO debug makefiles? |
Date: |
Sat, 6 Mar 2004 02:04:34 -0500 |
%% "Villalovos, John L" <address@hidden> writes:
vjl> I was wondering if there was some information out there on howto
vjl> debug makefiles.
Flags passed to the top-level make _should_ be passed to all submakes,
unless the parent make goes out of its way to remove them.
So you should be able to use make -p and/or make -d and that should be
true when your makefile is invoked.
vjl> Is there a way to echo out a variable even if I don't have a target
vjl> which is getting called in my Makefile?
Sure; just use something like:
$(warning variable FOO = $(FOO))
You can also use $(shell) to run shell commands, like this:
$(shell env | sort 1>&2)
this will show what variables are exported to the environment for
example. Remember for $(shell) that you have to redirect the output to
stderr, because $(shell) in make behaves like `` (backquotes) do in the
shell or Perl.
--
-------------------------------------------------------------------------------
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