ldconfig-native: don't write auxiliary cache

The auxiliary cache written by ldconfig is only useful for speeding up
future runs of ldconfig, and as it contains inode numbers as the keys
in a dictionary it is entirely pointless to generate on the build host.

(From OE-Core rev: 67c1ceb193130fcb30853c2cd1a6ef33a814886e)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glibc/ldconfig-native-2.12.1/no-aux-cache.patch

@@ -0,0 +1,19 @@
+The ldconfig auxiliary cache is a dictionary where the keys include inode, so
+there is no point in writing these files on the build host. 
+
+Upstream-Status: Inappropriate
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+
+diff --git a/ldconfig.c b/ldconfig.c
+index 2c4eb57..2d6dc92 100644
+--- a/ldconfig.c
++++ b/ldconfig.c
+@@ -1399,8 +1399,6 @@ main (int argc, char **argv)
+   if (opt_build_cache)
+     {
+       save_cache (cache_file);
+-      if (aux_cache_file)
+-        save_aux_cache (aux_cache_file);
+     }
+ 
+   return 0;

meta/recipes-core/glibc/ldconfig-native_2.12.1.bb

@@ -14,6 +14,7 @@ SRC_URI = "file://ldconfig-native-2.12.1.tar.bz2 \
            file://ldconfig-default-to-all-multilib-dirs.patch \
            file://endian-ness_handling_fix.patch \
            file://add-64-bit-flag-for-ELF64-entries.patch \
+           file://no-aux-cache.patch \
 "
 
 PR = "r2"