Hello Michal,
Here is my patch for dealing with race between 2 jobs of main Makefile:
>From 697f6ffa0d67b676fc2d75f65541c6e12108829d Mon Sep 17 00:00:00 2001
From: Noam Camus <noamc@xxxxxxxxxx>
Date: Fri, 16 Nov 2012 15:12:48 +0200
Subject: [PATCH] Makefile: solve race between make jobs.
Fix occasionally compilation failures when source tree is distcleaned.
The compilation is failing over file scripts/mod/empty.c
The error is because empty.o depends on some headers from:
arch/<arch>/include/generated/asm/
I see that there is a race between two targets in main Makefile (j=2):
1) asm-generic
2) scripts_basic
asm-generic:
generates all wrappers in arch/<arch>/include/generated/asm/
scripts_basic:
calls scripts/Makefile.build
--> performs target __build
--> depends on targets defined at variable $(always)
--> compile scripts/mod/empty.c
Occasionally compilation of empty.c starts before all its required
headers created by asm-generic are available.
This dependency will make sure that this situation can not happen.
Signed-off-by: Noam Camus <noamc@xxxxxxxxxx>
---
Makefile | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/Makefile b/Makefile
index 5be2ee8..00330a1 100644
--- a/Makefile
+++ b/Makefile
@@ -415,7 +415,7 @@ export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
# Basic helpers built in scripts/
PHONY += scripts_basic
-scripts_basic:
+scripts_basic: asm-generic
$(Q)$(MAKE) $(build)=scripts/basic
$(Q)rm -f .tmp_quiet_recordmcount
--
1.7.1
Please comment.
Noam Camus
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