gluon/patches/openwrt/0028-rules.mk-make-the-locked-template-available-even-if-flock-has-not-been-built-yet-fall-back-to-unlocked-shell-command.patch

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From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sun, 24 Apr 2016 08:45:44 +0200
Subject: rules.mk: make the locked template available even if flock has not been built yet (fall back to unlocked shell command)
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Backport of r48414
diff --git a/rules.mk b/rules.mk
index 9d0134d..ece5026 100644
--- a/rules.mk
+++ b/rules.mk
@@ -310,12 +310,16 @@ endef
# Execute commands under flock
# $(1) => The shell expression.
# $(2) => The lock name. If not given, the global lock will be used.
-define locked
+ifneq ($(wildcard $(STAGING_DIR_HOST)/bin/flock),)
+ define locked
SHELL= \
- $(STAGING_DIR_HOST)/bin/flock \
+ flock \
$(TMP_DIR)/.$(if $(2),$(strip $(2)),global).flock \
-c '$(subst ','\'',$(1))'
-endef
+ endef
+else
+ locked=$(1)
+endif
# Recursively copy paths into another directory, purge dangling
# symlinks before.