--- a/make/common/MakeBase.gmk Fri Jul 08 09:35:14 2016 -0700
+++ b/make/common/MakeBase.gmk Fri Jul 08 12:12:52 2016 -0700
@@ -801,15 +801,20 @@
# of the build in case of failure. The command line itself is stored in a file,
# and also logged to stdout if the LOG=cmdlines option has been given.
#
+# NOTE: If the command redirects stdout, the caller needs to wrap it in a
+# subshell (by adding parentheses around it), otherwise the redirect to the
+# subshell tee process will create a race condition where the target file may
+# not be fully written when the make recipe is done.
+#
# Param 1 - The path to base the name of the log file / command line file on
# Param 2 - The command to run
ExecuteWithLog = \
$(call LogCmdlines, Exececuting: [$(strip $2)]) \
$(call WriteFile, $2, $(strip $1).cmdline) \
- ( ( $(strip $2) > >($(TEE) $(strip $1).log) 2> >($(TEE) $(strip $1).log >&2) || \
+ ( $(strip $2) > >($(TEE) $(strip $1).log) 2> >($(TEE) $(strip $1).log >&2) || \
( exitcode=$(DOLLAR)? && \
$(CP) $(strip $1).log $(MAKESUPPORT_OUTPUTDIR)/failure-logs/$(subst /,_,$(patsubst $(BUILD_OUTPUT)/%,%,$(strip $1))).log && \
- exit $(DOLLAR)exitcode ) ) && wait )
+ exit $(DOLLAR)exitcode ) )
################################################################################
# Find lib dir for module