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-rw-r--r--make_helpers/unix.mk5
1 files changed, 4 insertions, 1 deletions
diff --git a/make_helpers/unix.mk b/make_helpers/unix.mk
index 61b1368b..17f8a7c2 100644
--- a/make_helpers/unix.mk
+++ b/make_helpers/unix.mk
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@@ -43,11 +43,14 @@ ifndef UNIX_MK
# ${1} is the directory to be generated.
# ${2} is optional, and allows a prerequisite to be specified.
+ # Do nothing if $1 == $2, to ignore self dependencies.
define MAKE_PREREQ_DIR
+ ifneq (${1},${2})
${1} : ${2}
${Q}mkdir -p "${1}"
+ endif
endef
define SHELL_REMOVE_DIR