lvm2: fixed detection of malloc() and realloc() when cross-compiling

base/lvm2/lvm2.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../lvm2/lvm2.conf
-# Copyright (C) 2007 - 2011 The OpenSDE Project
+# Copyright (C) 2007 - 2013 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -18,6 +18,16 @@ set_confopt
 
 var_append extraconfopt ' ' '--datarootdir=$datadir'
 
+# always regenerate autotools files
+# also fixes malloc() detection avoiding undefined reference to `rpl_malloc'
+hook_add preconf 9 'autoreconf -vfi'
+
+# cross-compiling help
+if atstage cross; then
+	# assuming a gnu compatible realloc
+	var_append configcache ' ' 'ac_cv_func_realloc_0_nonnull=yes'
+fi
+
 if [ "$SDECFG_STATIC" == 1 ]; then
 	var_append patchfiles ' ' "$confdir/no_dynamic.diff"
 	var_append confopt ' ' '--enable-static_link=yes'