ax_warning_default_aclocaldir
=============================

Synopsis
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     AX_WARNING_DEFAULT_ACLOCALDIR [(dirvariable [,[defsetting][,[A][,[N/A]]]])]
     AX_ENABLE_DEFAULT_ACLOCALDIR [(dirvariable [,defsetting])]

Description
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print a warning message if the $(datadir)/aclocal directory is not in the dirlist searched by the aclocal tool. This macro is useful if some `make install` would target $(datadir)/aclocal to install an autoconf m4 file of your project to be picked up by other projects.

      default $1 dirvariable = aclocaldir
      default $2 defsetting  = ${datadir}/aclocal
      default $3 action = nothing to do
      default $4 action = warn the user about mismatch

In the _WARNING_ variant, the defsetting is not placed in dirvariable nor is it ac_subst'ed in any way. The default fail-action $4 is to send a warning message to the user, and the default accept-action $3 is nothing. It is expected that a Makefile is generated with aclocaldir=${datadir}/aclocal

The _ENABLE_ variant however will set not only the $aclocaldir shell var of the script, but it is also AC-SUBST'ed on default - and furthermore a configure option "--enable-default-aclocaldir" is provided. Only if that option is set then $2 default is not set to the canonic default in the a $prefix subpath but instead $2 default is set to the primary path where `aclocal` looks for macros. The user may also override the default on the command line.

Source Code
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Download the latest version of ax_warning_default_aclocaldir.m4 (http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_warning_default_aclocaldir.m4) or browse the macro's revision history (http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=history;f=m4/ax_warning_default_aclocaldir.m4).

License
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Copyright © 2008 Guido U. Draheim guidod@gmx.de

Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.  This file is offered as-is, without any warranty.