gdb/testsuite/ChangeLog
2016-09-04  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* lib/future.exp: Set CCACHE_DISABLE, clear CCACHE_NODISABLE.

diff --git a/gdb/testsuite/lib/future.exp b/gdb/testsuite/lib/future.exp
index 2ecff2e..e7c9d9a 100644
--- a/gdb/testsuite/lib/future.exp
+++ b/gdb/testsuite/lib/future.exp
@@ -666,3 +666,8 @@ if {[info procs lreverse] == ""} {
 	return $retval
     }
 }
+
+# Various ccache versions provide incorrect debug info such as ignoring
+# different current directory, breaking GDB testsuite.
+set env(CCACHE_DISABLE) 1
+unset -nocomplain env(CCACHE_NODISABLE)