Re: Autoheader variable resolution

[Eric Blake]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

According to ptriller on 1/9/2009 10:26 AM:
> Hello,
> 
> I have a little problem, I want to make my own authheader variable:
> 
> gladedir="${datadir}/myApp"
> gladefile="${gladedir}/client.glade"
> AC_DEFINE_UNQUOTED(GLADE_FILE, "${gladefile}", Glade file for client)

This topic came up last month:
http://lists.gnu.org/archive/html/autoconf/2008-12/msg00040.html

$datadir is intentionally unexpanded at configure-time, in order to meet
GNU Coding Standards that it can be changed at make-time.  The best
solution is to not expect AC_DEFINE_UNQUOTED to do the work, but rather to
use a Makefile snippet that expands the variable during make-time into a
helper file (but not config.h), which you then include in your sources.

For an example of how gnulib does this, see the configmake module:
http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=blob;f=modules/configmake;h=5160128;hb=78f5fbf

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (Cygwin)
Comment: Public key at home.comcast.net/~ericblake/eblake.gpg
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkloADoACgkQ84KuGfSFAYDj4ACeP4/XUpELkt5EiB5Nm6jWOiD5
B7MAnjTZvk+AUiUNjWMFyFluCMoYVULy
=Z955
-----END PGP SIGNATURE-----