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Re: ifdef expessions in

From: Ralf Wildenhues
Subject: Re: ifdef expessions in
Date: Fri, 18 Dec 2009 08:45:41 +0100
User-agent: Mutt/1.5.20 (2009-10-28)

* Joakim Tjernlund wrote on Thu, Dec 17, 2009 at 11:29:19PM CET:
> if @TEST@ then
>  SUBDIRS+= dir1/dir2/@TEST@
>  SUBDIRS+= dir3/dir2/@TEST@
>  SUBDIRS+= dir4/@TEST@
> ....
> endif

The syntax is
  if TEST
    SUBDIRS += ...

and there should not be any indentation of `if' and `endif', and at most
spaces for indentation of variable assignments, no TABs.

You already learned that running aclocal and autoconf is required;
the first time you use AM_CONDITIONAL, the code of this macro needs to
be added to your aclocal.m4 file.

If you need to maintain a patch against a Libtool macro, then what most
users do is write a bootstrap or script which consists of
something like

  libtoolize [--copy] [--install]
  patch -p0 - <<EOF
  here comes your patch text for m4/libtool.m4
  aclocal -I m4
  automake -Wall


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