acinclude.m4, configure.in: In recent autotools, ${datadir} is

defined in terms of ${datarootdir}, so EXPANDED_DATADIR needs to be
expanded recursively. Rather than fixing configure.in to do this, I
grabbed the AS_AC_EXPAND macro from autostars.sf.net, which seems to be
commonly used.

1 files changed, 50 insertions, 0 deletions

diff --git a/acinclude.m4 b/acinclude.m4
index a8d649e6..5dac6478 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -81,3 +81,53 @@ $2])
 CPPFLAGS="$save_CPPFLAGS"
 ])
 
+
+dnl as-ac-expand.m4 0.2.0                                   -*- autoconf -*-
+dnl autostars m4 macro for expanding directories using configure's prefix
+
+dnl (C) 2003, 2004, 2005 Thomas Vander Stichele <thomas at apestaart dot org>
+
+dnl Copying and distribution of this file, with or without modification,
+dnl are permitted in any medium without royalty provided the copyright
+dnl notice and this notice are preserved.
+
+dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)
+
+dnl example:
+dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)
+dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local
+
+AC_DEFUN([AS_AC_EXPAND],
+[
+  EXP_VAR=[$1]
+  FROM_VAR=[$2]
+
+  dnl first expand prefix and exec_prefix if necessary
+  prefix_save=$prefix
+  exec_prefix_save=$exec_prefix
+
+  dnl if no prefix given, then use /usr/local, the default prefix
+  if test "x$prefix" = "xNONE"; then
+    prefix="$ac_default_prefix"
+  fi
+  dnl if no exec_prefix given, then use prefix
+  if test "x$exec_prefix" = "xNONE"; then
+    exec_prefix=$prefix
+  fi
+
+  full_var="$FROM_VAR"
+  dnl loop until it doesn't change anymore
+  while true; do
+    new_full_var="`eval echo $full_var`"
+    if test "x$new_full_var" = "x$full_var"; then break; fi
+    full_var=$new_full_var
+  done
+
+  dnl clean up
+  full_var=$new_full_var
+  AC_SUBST([$1], "$full_var")
+
+  dnl restore prefix and exec_prefix
+  prefix=$prefix_save
+  exec_prefix=$exec_prefix_save
+])